ALEXA SXT Plus - Camera ARRI - Free user manual and instructions

USER MANUAL ALEXA SXT Plus ARRI

ALEXA SXT Family of Cameras

Software Update Packet 2.0

USER MANUAL

12 September 2017

Copyright

All rights reserved.

This document is provided under a license agreement containing restrictions on use and disclosure and is also protected by copyright law.

Due to continued product development this information may change without notice. The information and intellectual property contained herein is confidential between ARRI and the client and remains the exclusive property of ARRI. If you find any problems in the documentation, please report them to us in writing. ARRI does not warrant that this document is error-free.

Arnold & Richter Cine Technik

Tuerkenstr. 89

D-80799 Munich

Germany

mailto: [e-mail]

http://www.arri.com

Contents

1 Disclaimer....7

2 About This Manual....9

3 Scope.... 10

4 Introduction to the ALEXA SXT Camera System.... 11

5 Layout of the ALEXA.... 19

6 Safety Guidelines....21

6.1 Explanation of Warning Signs and Indications....21

6.2 General Safety Guidelines.... 21

6.3 Specific Safety Instructions.... 21

7 General Precautions....23

7.1 Storage and Transport.... 23

7.2 Condensation....23

8 Power Supply....24

8.1 Power Management.... 24

8.2 BAT Connector.... 24

8.3 Mains Unit NG 12/26 R....25

8.4 Cine-Style Batteries.... 25

8.5 Onboard Batteries.... 26

8.5.1 V-Lock Batteries.... 26

8.5.2 Gold Mount Batteries....27

8.6 Power Outputs....28

8.6.1 Powering 12 V Accessories.... 28

8.6.2 Powering 24 V Accessories.... 29

9 Camera Support....30

9.1 Minimum Equipment Recommended For Operation.... 30

9.2 Tripod and Remote Heads.... 30

9.3 Electronic Viewfinder EVF-1....30

9.3.1 Viewfinder Cables....31

9.3.2 Viewfinder Mounting Bracket....32

9.4 Center Camera Handle CCH-1.... 34

9.5 Side Camera Handle SCH-1.... 35

9.6 Bridge Plates BP-12/BP-13.... 35

9.7 Bridge Plate adapter BPA-1.... 36

9.8 Wedge Adapter WA-1 and Quick-Release Plate QR-HD-1.... 36

9.9 Levelling Block LB-1....36

9.10 Shoulder Pad SP-3....37
10 Connectors.... 38
10.1 BAT....39
10.2 RET SYNC IN.... 39
10.3 MON OUT 1/2/3....40
10.4 EXT.... 40
10.5 ETHERNET....40
10.6 EVF 40
10.7 AUDIO IN....40
10.8 RS....41
10.9 12 V....41
10.10 TC....41
10.11 AUDIO OUT....41
10.12 SD Card....41
10.13 Recording Module.... 43

11 Lens Mounting.... 47

11.1 Lens Adapter PL-Mount LA-PL-2....47

11.2 Lens Support.... 48

12 In-Camera Filter Module IFM-1....50

12.1 Safety instructions for in-camera filtration.... 51

12.1.1 Maximum lens mounting depth.... 51

12.1.2 Basic precautions.... 52

12.1.3 Required shimming and maximum lens mounting depth.... 52

12.2 Available FSND Filter Sets....52

12.2.1 FSND Filter Set (Basic)....53

12.2.2 FSND Filter Set (Completion).... 53

12.2.3 FSND Filter Set (Full)....54

12.3 Shimming the lens mount.... 55

12.4 Mounting in-camera filters.... 61

12.5 Filter cleaning....64

13 Camera Controls....66

13.1 Main Controls....66

13.1.1 Display....66

13.1.2 Screen Buttons....67

13.1.3 HOME screen....67

13.1.3.1 Lists and User Lists....70

13.1.3.2 FPS....71

13.1.3.3 AUDIO....72

13.1.3.4 SHUTTER....75

13.1.3.5 El....75

13.1.3.6 COLOR....77

13.1.3.7 WB....80

13.1.4 Function Buttons....81

13.1.4.1 TC....83

13.1.4.2 INFO....85

13.1.4.3 USER....88

13.1.4.4 PLAY....91

13.1.5 Menu....94

13.1.5.1 Recording....94

13.1.5.2 Monitoring....97

13.1.5.3 Project....105

13.1.5.4 System....107

13.1.5.5 Frame Grabs.... 116

13.1.5.6 User Setups....117

13.2 Operator controls....119

13.3 EVF-1 Controls.... 120

13.3.1 Viewfinder EVF menu....120

13.3.2 Viewfinder CAM menu....122

13.4 Web Remote....122

14 Operation of the Camera.... 123

14.1 Internal recording....123

14.1.1 Recording Module.... 123

14.1.2 Internal Recording Formats....123

14.2 Monitoring.... 131

14.2.1 Frame Lines....131

14.2.2 Status Info Overlays.... 132

14.3 Using Timecode....134

14.4 Syncing the Sensors of Two Cameras....135

14.5 Syncing the Settings of Two Cameras....137

15 ALEXA SXT Plus....139

15.1 Radio System.... 140

15.2 Wireless Remote System.... 141

15.2.1 Setting the region of the wireless function.... 141

15.2.2 Lens Motors....142

15.2.3 Hand Units....143

15.3 Lens Data Display LDD-FP 144

15.4 Plus Camera Controls.... 144

16 ALEXA SXT W....150

16.1 WiFi....150

16.2 Wireless Video....151

16.2.1 Preparation.... 152

16.2.2 Status LEDs....153

16.2.3 Pairing camera and receivers.... 153
16.2.4 Supported resolutions....154
16.2.5 Supported frequencies.... 155
16.2.6 Sample setups....155
16.2.7 Software update.... 156
17 ALEXA SXT Studio.... 157
17.1 ALEXA Studio Images....157
17.2 Optics....159
17.2.1 Electronic Mirror Shutter....159
17.2.2 Lens Adapter PL Mount LA-PL-2.... 159
17.2.3 Optical Viewfinder....161
17.2.4 ND Filter.... 167
17.3 Studio Camera Controls.... 168
18 Remote Control Unit RCU-4.... 172
19 Index....173
20 Appendix....175
20.1 Technical data....175
20.2 Connector Pin Outs.... 177
20.3 False Color Display.... 182
20.4 Warning and Error Messages....183
20.5 Dimensions and Weights....188
20.6 Declarations of Conformity.... 189

1 Disclaimer

Before using the products described in this manual be sure to read and understand all respective instruction.

The ARRI ALEXA is only available to commercial customers. The customer grants by utilization that the ARRI ALEXA or other components of the system are deployed for commercial use. Otherwise the customer has the obligation to contact ARRI preceding the utilization.

While ARRI endeavors to enhance the quality, reliability and safety of their products, customers agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely. To minimize risk of damage to property or injury (including death) to persons arising from defects in the products, customers must incorporate sufficient safety measures in their work with the system and have to heed the stated canonic use.

ARRI or its subsidiaries do not assume any responsibility for incurred losses due to improper handling or configuration of the camera or other system components, due to sensor contamination, occurrence of dead or defective pixels, defective signal connections or incompatibilities with third party recording devices.

ARRI assumes no responsibility for any errors that may appear in this document. The information is subject to change without notice.

For product specification changes since this manual was published, refer to the latest publications of ARRI data sheets or data books, etc., for the most up-to-date specifications. Not all products and/or types are available in every country. Please check with an ARRI sales representative for availability and additional information.

Neither ARRI nor its subsidiaries assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from the use of ARRI products or any other liability arising from the use of such products. No license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual property right of ARRI or others.

ARRI or its subsidiaries expressly exclude any liability, warranty, demand or other obligation for any claim, representation, or cause, or action, or whatsoever, express or implied, whether in contract or tort, including negligence, or incorporated in terms and conditions, whether by statute, law or otherwise. In no event shall ARRI or its subsidiaries be liable for or have a remedy for recovery of any special, direct, indirect, incidental, or consequential damages, including, but not limited to lost profits, lost savings, lost revenues or economic loss of any kind or for any claim by third party, downtime, good-will, damage to or replacement of equipment or property, any cost or recovering of any material or goods associated with the assembly or use of our products, or any other damages or injury of the persons and so on or under any other legal theory.

In the case one or all of the foregoing clauses are not allowed by applicable law, the fullest extent permissible clauses by applicable law are validated.

ARRI is a registered trademark of Arnold & Richter Cine Technik GmbH & Co Betriebs KG.

The ALEXA viewfinder EVF-1 contains proprietary technology owned by Fourth Dimension Displays Limited and licensed by ARRI.

This product contains licensed technology from Linotype.

Quicktime and Quicktime logo are trademarks or registered trademarks of Apple Computer, Inc., used under license therefrom.

Apple ProRes 422 Proxy, Apple ProRes 422 LT, Apple ProRes 422, Apple ProRes 422 HQ, Apple ProRes 4444, Apple ProRes 444 XQ, and the ProRes logo are trademarks or registered trademarks of Apple Computer, Inc., used under license therefrom.

mkdosfs

Portions ©1998, Robert Nordier. All Rights Reserved.

© 1998, Robert Nordier. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

2 About This Manual

ARRI recommends that all users of the ALEXA read the manual in its entirety prior to use. For experienced users, the manual's structure also provides quick access for reference.

How to Use This Manual

All directions are given from a camera operator's point of view. For example, camera-right side refers to the right side of the camera when standing behind the camera and operating it in a normal fashion.

Connectors are written in all capital letters, for example, MON OUT. Menus and screens on the Main Camera Controls are written in all capital letters, for example, RECORDING menu and HOME screen. Buttons are written in italic typeface capital letters, for example, PLAY button.

The appendix at the back of the manual contains useful reference material including ALEXA specifications, connector pin-out diagrams, a false color display explanation, error and warning message explanations, ALEXA dimensional drawings and a menu structure tree.

3 Scope

This instruction manual applies to the following hardware, software and firmware versions:

ALEXA SXT EV, ALEXA SXT Plus, ALEXA SXT W: with Electronic Viewfinder EVF-1;

ALEXA SXT Studio: with optical viewfinder or with Electronic Viewfinder EVF-1;

Camera Software Update Packet (SUP) for ALEXA SXT cameras: 2.0

Document revision history

Document ID: 10001880

Version Release Date

1.0 K09044 23 November 2016

2.0 K09398 12 September 2017

4 Introduction to the ALEXA SXT Camera System

ALEXA SXT (Super Xtended Technology) is an extraordinary 35mm format digital camera system designed for motion pictures and television, consisting of four cameras and an extensive range of primes, zooms, accessories and recording solutions. Combining innovative digital technology with a century of ARRI history and experience has created a camera system that makes it easy to create great looking images.

ALEXA's stellar overall image quality makes ALEXA images future-proof, no matter what the intended delivery format. Whether in High Dynamic Range (HDR), with delivery resolutions anywhere from HD to 4K or when being used with spherical or anamorphic lenses, ALEXA images look spectacular. ALEXA's reliability, simplicity of operation, as well as unequalled workflow efficiency and versatility ensures lowest overall production costs.

What's New in ALEXA SXT Cameras?

ALEXA SXT cameras share the same high-performance electronics and image processing with the ALEXA 65, and the same look management and noise reduction as can be found in ALEXA Mini and AMIRA. A new media bay allows the use of new high speed and high capacity SXR Capture Drives, as well as XR Capture Drives, SxS PRO, SxS PRO+ and CFast 2.0 cards.

New recording formats

• Carefully fine-tuned recording options for any production
• All sensor modes now available in ARRIRAW and ProRes
• ProRes 4K UHD
ProRes 4K Cine
• ProRes 2K anamorphic
• ProRes 4K Cine anamorphic
• Open Gate ProRes 3.4K
• ARRIRAW 3.2K

New ARRI Look Management

• comprehensive look management from pre-production to post-production
• ARRI Look File ALF-2 with 3D LUT, CDL values and name of target color space
• looks are always stored in metadata
• live grading on-set
• automated dailies
• editing with looks

Super flexible on-set monitoring

• High Dynamic Range (HDR) monitoring
• four independent monitoring outputs
• Rec 709 or Rec 2020 output

Integrated HD video transmitter and WiFi radio (SXT W only)

• wireless HD monitoring
• wireless color management on-set
• wireless camera remote control

Improved image quality

• optional mild ARRI Noise Reduction (ANR)
• advanced defect pixel correction
• 3D LUTs provide more flexibility for baked-in looks

Single speed mode

New media bay and drives

• supports SxS PRO, SxS PRO+ and CFast 2.0 cards
• supports XR Capture Drives and SXR Capture Drives
- new SXR Capture Drives are modern high capacity and high speed drives
• new SXR Capture Drive Dock (Thunderbolt)

ALEXA SXT Camera Models

The ALEXA SXT EV (Entry Version) provides the most affordable entry with full ALEXA image quality, a Super 35 Open Gate sensor, ARRI Lens Data System, as well as in-camera ARRIRAW and ProRes recording in a variety of recording formats.

The ALEXA SXT Plus is a true allrounder. On top of the ALEXA SXT EV features, the ALEXA SXT Plus provides an integrated wireless radio for camera and lens remote control (with the ARRI Electronic Control System (ECS) or emotion evolution system), Lens Data System, built-in tilt and roll sensors, as well as additional connectors for remote control, video outputs (HD-SDI) and accessory power (RS).

The ALEXA SXT W (Wireless) is the most versatile and flexible of the ALEXA SXT cameras. The SXT W is based on the ALEXA SXT Plus and extends its features with an integrated HD video transmitter and an integrated WiFi radio.

The flagship of the range, the ALEXA SXT Studio, is the only digital motion picture camera with an optical viewfinder and a rotating mirror shutter.

ALEXA SXT Main Features

Best Overall Image Quality

• Film-like, organic look
• High Dynamic Range
14+ stops dynamic range over the entire EI range as measured with the ARRI Dynamic Range Test Chart
- gentle highlight roll-off
- low noise floor
- holds up extremely well when over or underexposed
- future proof for High Dynamic Range (HDR) displays

• Sharp, natural images for HD, 2K, 4K UHD and 4K Cine deliverables

• Unique tall sensor is ideal for anamorphic lenses

• High Frame Rate (HFR)

- up to 120 fps in full image quality

• High sensitivity

- true base sensitivity of EI 800

。 adjustable from EI 160 to EI 3200

• ARRI color science

o natural color reproduction, especially for skin tones

- excellent color separation

• great at resolving mixed color temperature sources
• optional mild ARRI Noise Reduction (ANR)

All ALEXA cameras provide the best looking digital image with the least amount of fuss. This is made possible by a unique imaging chain consisting of a high-end optical low pass filter, a custom made CMOS sensor, as well as custom electronics and processing software. Carefully crafted by ARRI engineers, these components work together to produce images with the organic look and feel of film.

The ALEXA has the highest dynamic range of any digital production camera, with special consideration given to a gentle highlight treatment. Creating a good looking roll-off in the highlights is probably one of the most difficult tasks for any camera designer. We have spent enormous resources to ensure ALEXA's outstanding performance in the critical area between almost overexposed and fully overexposed. ALEXA footage is (and has been since its introduction in June, 2010) the best starting point for creating stunning images for the emerging High Dynamic Range (HDR) display technologies.

By striking a perfect balance between photosite size and number, ALEXA's 3.4K sensor is able to produce beautiful, natural looking images for HD, 2K, 4K UHD and 4K Cine deliverables.

ALEXA is the only camera on the market with a sensor that is tall enough for anamorphic lenses to be used just as they were on film cameras. In addition, the ability to record at up to 120 fps in full image quality means that High Frame Rate (HFR) shooting can also be accommodated.

ALEXA's high sensitivity and its ability to hold up very well, even when extremely under or overexposed, work on any real-world set. ALEXA's color processing was developed by our own color scientists (who have been also working on the ARRILASER and ARRISCAN, so are intimately familiar with both film and digital color science), and creates clean and natural colors, especially noticeable in ALEXA's great looking skin tones. The low noise floor and great color separation helps greatly in color correction and compositing, aided, when needed, by the mild ARRI Noise Reduction (ANR).

Our goal is creating the best looking images. When assessing imaging technologies, we ask if they improve image quality, disregarding the marketing hype.

Efficient and Versatile Workflows

Multiple recording and monitoring options

• record/play back ARRIRAW or ProRes
• multiple recording media
• 14 recording formats
• ARRI Look Management
• super flexible on-set monitoring
• embedded rich metadata in ARRIRAW, ProRes and HD-SDI out

In-camera ARRIRAW

• uncompressed, unencrypted raw sensor data
• maximum image quality from ALEXA
• greatest flexibility in post
• best option for future-proof archiving
• published in SMPTE RDD 30:2014 and 31:2014

In-camera Apple ProRes™

• compressed color image data
• native Final Cut Pro X support

• ProRes 422, 422 HQ, 4444 and 4444 XQ
- pre-recording
• supports SxS PRO, SxS PRO+ and CFast 2.0 cards
• supports XR capture Drives and SXR Capture Drives

Multiple recording media

14 recording formats

• Carefully fine-tuned recording options for any production
• All sensor modes in ARRIRAW and ProRes
• Multiple resolutions: HD, 2K, 3.2K, 3.4K, 4K UHD and 4K Cine
• In-camera de-squeezed ProRes for most economical anamorphic shooting

ARRI Look Management

• Comprehensive look management from pre-production to post-production
• ARRI Look File ALF-2 with 3D LUT, CDL values and name of target color space
• looks are always stored in metadata
• live grading on-set
- wireless color management on-set with the WiFi module (SXT W only)
• automated dailies
• editing with looks

Super flexible on-set monitoring

• four independent monitoring outputs
• High Dynamic Range (HDR) monitoring
• Rec 709 or Rec 2020 output
• streaming metadata in HD-SDI for immediate use
- wireless HD monitoring with the HD video transmitter (SXT W only)

Online tools and free Mac applications

• Online Lens Illumination Guide
• Online Frameline Composer
• ARRI Formats & Datarate Calculator
• Online Camera Simulator
• Online LUT Generator
• ARRIRAW Converter (ARC)
• ARRI Color Tool (ACT)
• ARRI Meta Extract (AME)

All productions benefit from using an ALEXA SXT, because of the efficiency and versatility of the ALEXA workflows. ALEXA SXT cameras can record and play back ARRIRAW or Apple ProRes in one of 14 recording formats. Whatever the budget, intended market, resolution requirements, aspect ratio, lens choices or postproduction intentions, there is an ideal ALEXA SXT recording format to ensure easy operation onset and a seamless image pipeline. ALEXA SXT cameras work with SxS PRO cards, SxS PRO+ cards, CFast 2.0 cards, XR Capture Drives and SXR Capture Drives.

ARRIRAW is an unencrypted, uncompressed raw image format that contains the full raw data from the sensor for the absolute best image quality. For greatest flexibility in post, nothing is "baked" into an ARRIRAW image. Therefore image-processing steps like debayer, white balance, sensitivity or resampling can be optimized in post, based on image content and intent. Since we openly publish the ARRIRAW specs, ARRIRAW is also an excellent future-proof archiving format.

ProRes is the native file format used by Apple's Final Cut Pro software. ProRes provides a high image quality while using compression to reduce file size and thus costs. Different ProRes flavors are available with different compression ratios (422, 422 HQ, 4444 and 4444 XQ) for a trade-off between image fidelity and file size/costs. Productions appreciate the immediacy of ProRes, as it can be viewed on any Mac without special tools and there is an extensive infrastructure readily available to process ProRes files. ALEXA is capable of pre-recording with all ProRes recording formats.

The new ARRI Look Management provides comprehensive look management from pre-production through post-production, protecting the intended look of the cinematographer in an easy and transparent manner. The new ARRI Color Tool (ACT) is used to create the new ARRI Look File (ALF-2), which contains a 3D LUT, CDL values and the name of the target color space. The ALF-2 look file is always stored in metadata. A software library enables third parties to incorporate this look management system into their products, leading to exciting new applications, including live on-set grading, automated dailies and editing with looks.

Special attention has been paid to provide the most flexible on-set monitoring experience for the crew. Four independent monitoring outputs (the electronic viewfinder and three HD-SDI outputs) allow each crewmember to customize the image they need to see. The HD-SDI outputs support Rec 709 and Rec 2020, as well as Standard Dynamic Range (SDR) and High Dynamic Range (HDR) monitors. In addition, the ALEXA SXT W camera can be monitored wirelessly with the integrated HD video transmitter.

All files recorded with ALEXA SXT contain rich metadata that speeds up post-production. Metadata is also streamed as part of the HD-SDI outputs for immediate use.

A number of useful online tools and free Mac programs complete the workflow.

So, disregarding if you want to shoot a low budget TV series or Martin Scorsese's next big Hollywood feature film, ALEXA SXT cameras can be easily configured for the task at hand.

Simple and Safe Operation

• ARRI Product Quality
• Rugged and reliable

- sealed electronics compartment

• unique cooling system
• stable lens mount/sensor holder
• continuous file closing protects footage
• ARRIRAW checksum for safe and fast downloading
• self-healing metadata
• two auto-switching power inputs

• Intuitive, easy to use controls

• on-camera and EVF-1 controls
• remote control through WCU-4, RCU-4 and Web Remote

• High quality internal Full Spectrum Neutral Density (FSND) filters

- neutral color balance at all densities from ND 0.3 to ND 2.4

• High quality electronic viewfinder
• Powerful assistive displays, including

- surround view

- anamorphic de-squeeze

• false color exposure check
• smooth mode for better motion portrayal
• peaking focus check
• electronic horizon
• compare stored image with live image

。RETURN IN video

• Well balanced, ergonomic body design

• Global ARRI service network

ALEXA SXT cameras are part of a long heritage of cameras from ARRI, and we are quite familiar with the sometimes extreme and nightmarish things our cameras have to endure in the field. We just have to go into our own service department to see the carnage. Keeping that in mind, ALEXA SXTs are built to be rugged and reliable with a sealed electronics compartment, a unique cooling system and the most stable lens/sensor mount German engineering could devise. A special method of continuously closing and re-opening container files ensures that very little image data is lost during a power interruption, and the camera will heal any metadata damage automatically. A checksum for ARRIRAW ensures safe and fast downloading.

We know what it is like to try to change fps and shutter angle at 4:00 am in the morning in the rain after a long night's shoot. Professional cameras need to be simple to operate, and they need to make sure that a good looking image is recorded, no matter what. For ALEXA we have developed an intuitive user interface that is easy to learn and quick to operate. The same interface is used on all models of ALEXA, all with the same on-camera menu, buttons, etc., so there is no learning curve when using another ALEXA model. Remote control of an ALEXA is possible through the wireless WCU-4, the cabled and extremely sturdy RCU-4 or through any computer with the ALEXA Web Remote.

Using internal ND filters allows a rating at the base sensitivity of EI 800 without the need for external ND filters, even in bright sunlight. ALEXA's Full Spectrum Neutral Density (FSND) filters offer light attenuation that maintains a neutral color balance at all densities.

Critically important to camera operators is the viewfinder. Based on our experience with optical viewfinders, ALEXA's electronic viewfinder provides an exceptionally clear image with natural skin tones and smooth motion portrayal that is easy on the eye. For those who prefer optical viewfinders, the ALEXA SXT Studio can be operated with an optical or electronic viewfinder. The electronic viewfinder includes powerful assistive displays like surround view, anamorphic de-squeeze, false color exposure check, smooth mode, peaking and an electronic horizon. In order to check previz footage or the image from a second camera, ALEXA has a::SPACE SPACE::IN video input, and when it is critical to perfectly line up a product shot, it is possible to compare a stored still image with the live camera image.

The hardware of the camera is designed for the best and most ergonomic use on the set, including a built-in shoulder cut-out, many attachment points on the camera's precision machined housing and a large variety of accessories. With meticulous attention to detail we have added many small but helpful design refinements, including built-in supports for 15 mm lightweight. Additionally, the camera has various extrusions (eyebrows) above some buttons so the operator can feel the button's position even from the other side of the camera or when shooting in low light. The same care has been taken to ensure compatibility with the extensive range of existing accessories.

ALEXAs are well balanced and can be quickly switched from shoulder use to tripod, crane or Steadicam. They accept a wide range of power input from 10.5 to 34 V DC. Multiple power sources can be simultaneously connected (with hot-plug capability) and a smart circuit will automatically switch to the one with the highest voltage.

All ALEXA SXTs are backed by ARRI's global service network, providing a friendly ARRI service technician accessible 24/5.

Open, Future-proof Architecture

• Compatibility with industry standards
Super 35 PL mount lenses
- Apple ProRes, HD-SDI
- SxS PRO, SxS PRO+ and CFast 2.0 cards
Gold mount or V-lock on-board batteries
- 12 or 24 V power inputs and outputs
o support for ARRI ECS and emotion evolution wireless lens control systems

• ARRI Partner Program

。ARRI Look Management library

- ARRIRAW Software Developers Kit (SDK)

- ARRI Metadata Bridge (AMB) library

- White papers and information about ARRI color science

• Flexible upgrade options

- upgradable in-camera recording module

- upgradable electronics interface module (Plus side panel)

- upgradable HD video transmitter and WiFi radio (SXT W upgrade)

Exchangeable Lens Mount (ELM)

- free Software Update Packets (SUPs)

• Long and reliable product cycles

We are open to equipment and standards from other manufacturers, as can be seen in ALEXA's compatibility with Super 35 PL mount lenses, SxS PRO, SxS PRO+ and CFast 2.0 cards, Apple ProRes, HD-SDI, Gold or V-mount on-board batteries, the emotion lens control system and both 12 and 24V accessories. We want to make sure that you can put together the right ALEXA package with the accessories you want.

To ensure a smooth workflow, we share our know-how with third parties through the ARRI Partner Program. The ARRI Look Management library allows third parties access to all look management functions found in the ARRI Color Tool, including the ability to change looks live in-camera. The ARRIRAW Software Development Kit (SDK) allows them to integrate the ARRI debayering algorithm and various other image processing steps into their own products. The ARRI Metadata Bridge (AMB) tackles the tricky problem of getting metadata from the ARRIRAW or ProRes recording files into the file formats (DPX and OpenEXR) of those who can actually benefit from the metadata. We have published our color science in various white papers and the ARRIRAW debayering method in two SMPTE Recommended Disclosure Documents (RDD 30:2014 and RDD 31:2014).

In addition, ALEXAs can be upgraded, as we have shown with numerous hardware upgrades in the past. The Software Upgrade Packets (SUPs) are continuously improving ALEXA cameras with new and exciting features. All this, combined with our long product cycles, creates a sustainable business model for all owners of ARRI cameras.

Older Generation ALEXA Cameras

ALEXA Classic Cameras

First generation ALEXAs are called ALEXA Classic cameras. They were released between 2010 and 2012. They have exceptional image performance and are simple to operate, reliable in the most extreme environments and versatile enough to cover a

wide range of workflows and budgets. ALEXA Classic camera models are the ALEXA, ALEXA Plus, ALEXA Plus 4:3, ALEXA M, ALEXA Studio, ALEXA HD and ALEXA HD Plus. The ALEXA HD and HD Plus are the basis for the ALEXA Fiber Remote Option (FRO) and Fiber Remote Option Plus camera sets. All ALEXA Classic cameras are equipped with an SxS Module located on the left side of the camera with two slots for SxS PRO or SxS PRO+ cards.

ALEXA XT Cameras

Second generation ALEXAs are called ALEXA XT cameras (Xtended Technology), sold from 2013 until 2016. In addition to all the features of the ALEXA Classic cameras, they are equipped with a Super 35 sensor with Open Gate and 4:3 sensor modes, in-camera ARRIRAW up to 120 fps, ProRes 4444 XQ, ProRes 3.2K, internal FSND filters, Lens Data System, integrated CDL capture and ARRIRAW checksum. In addition, they use a new viewfinder mounting bracket (VMB-3), include anamorphic de-squeeze and high speed licenses, as well as a super silent fan. ALEXA XT cameras are the ALEXA XT, ALEXA XT Plus, ALEXA XT M and ALEXA XT Studio. The XR Module is on the left side of the camera. It has one slot for either an XR Capture Drive, the SxS Adapter for use with one SxS PRO or SxS PRO+ card or the CFast 2.0 Adapter for use with one CFast 2.0 card.

With the exception of the Open Gate sensor mode, ALEXA Classic cameras can be upgraded with the XR Module and other parts for most of the features of ALEXA XT.

5 Layout of the ALEXA

The following images show the ALEXA SXT EV:

Close-up of a black mechanical device with circular top and mounting holes (no visible text or symbols)

Exterior view of a black ARRI (Advanced Radar System) device with control panel and display screen (no readable text or symbols beyond branding)

Close-up of a black electronic device with multiple ports and mounting brackets (no visible text or symbols)

Exterior view of a black ARRI camera module with control panel and display (no readable text or symbols beyond branding)

Top-down view of a mechanical component with ventilation grilles and mounting holes (no visible text or symbols)

Top-down view of a mechanical assembly with cooling fins and mounting features (no visible text or symbols)

6 Safety Guidelines

Any violation of these safety instructions or non-observance of personal care could cause serious injuries (including death) to users and affiliates and damage to the equipment or other objects.

6.1 Explanation of Warning Signs and Indications

Indicates a possible risk of injury or damage to the equipment

Indicates the risk of electric shock or fire danger that could result in injury or to the equipment.

NOTICE

Indicates further information or information from other instruction manuals

6.2 General Safety Guidelines

• Always follow these guidelines to ensure against injury to yourself or others and damage to the system or other objects.
• This safety information is in addition to the product specific operating instructions in general and must be strictly observed for safety reasons.
• Read and understand all safety and operating instructions before you operate or install the system!
  • Retain all safety and operating instructions for future reference.
• Heed all warnings on the system and in the safety and operating instructions before you operate or install the system. Follow all installation and operating instructions.
• Do not use accessories or attachments that are not recommended by ARRI, as they may cause hazards and invalidate the warranty!
• Do not attempt to repair any part of the system! Repairs must only be carried out by authorized ARRI Service Centers.

6.3 Specific Safety Instructions

• Do not remove any safety measures from the system!
- Do not operate the system in areas with humidity above operating levels or expose it to water or moisture!
• Do not cover the fan openings at the camera back top and bottom!

• Do not subject the system to severe shocks!
- Do not place the system on an unstable trolley/hand truck, stand, tripod, bracket, table or any other unstable support device! The system may fall, causing serious personal injury and damage to the system or other objects.
- Operate the system using only the type of power source indicated in the manual! Unplug the power cable by gripping the power plug, not the cable!
- Never insert objects of any kind into any part of the system if not clearly qualified for the task in the manual, as objects may touch dangerous voltage points or short out parts! This could cause fire or electrical shock.
- Unplug the system from the power outlet before opening any part of the system or before making any changes to the system, especially the attaching or removing of cables!
• Do not use solvents to clean!
• Do not remove any stickers or paint marked screws!
• Always place a lens or a protective cap in the lens mount receptacle!
- Never run a camera with a mirror shutter without a lens or a protective cap in the lens mount receptable!
- Changing camera lenses should be done in a dry and dust-free environment. If this is not possible, take extra care that no dust enters the camera while the lens is off!
- When no lens is attached to the camera, immediately place the protective on the lens mount to avoid contamination of the sensor cover glass!
- After changing lenses, always perform a dust check to make sure no dust has settled on the sensor cover glass!
- Clean optical lens surfaces only with a lens brush or a clean lens cloth. In cases of solid dirt or grease, moisten a lens cloth with pure alcohol. Discard contaminated lens cloth after use! Never attempt to clean a lens brush with your fingers!
- NEVER USE CANS WITH COMPRESSED AIR OR GAS TO BLOW OFF THE DUST! This can severely damage optical elements.
- If the sensor cover glass has been contaminated by solid dirt or grease, special optical cleaning kits should be used for dirt removal under very high care! If the contamination cannot be removed, the camera should be taken to an ARRI service center for cleaning.
- THE USE OF METHANOL TO CLEAN OPTICAL SURFACES IS NOT RECOMMENDED!
• NEVER USE ACETONE TO CLEAN OPTICAL SURFACES!
• NEVER TRY TO REMOVE THE SENSOR COVER GLASS!
- DO NOT POINT THE CAMERA INTO DIRECT SUNLIGHT, VERY BRIGHT LIGHT SOURCES, OR HIGH-ENERGY LIGHT SOURCES (e.g. laser beams)! This may cause permanent damage to the camera image sensor.
- DO NOT POINT THE VIEWFINDER INTO DIRECT SUNLIGHT, VERY BRIGHT LIGHT SOURCES, OR HIGH-ENERGY LIGHT SOURCES (e.g. laser beams)! This may cause permanent damage to the viewfinder display and optical elements.
- During extended operation, high data rates and/or operation at high ambient temperatures, the camera's surfaces and especially the area around the ventilation grille on top of the camera at the camera rear can get hot. Use caution and never cover, obstruct or block the fan inlets or outlets while the camera is powered.

7 General Precautions

7.1 Storage and Transport

• Use a lens port cap to prevent damage to the sensor cover glass and sensor whenever there is no lens attached.
  • Unplug all cables when transporting the ALEXA in a camera case.
• Do not store the camera in places where it may be subject to temperature extremes, direct sunlight, high humidity, severe vibration, or strong magnetic fields.

7.2 Condensation

When moving the camera from a cool to a warm location or when the camera is used in a damp environment, condensation may form inside the lens port, on the sensor cover glass, between the sensor and the sensor cover glass, and on internal or external electrical connections.

Operating the camera while condensation is present may result in personal injury or damage to the equipment.

Condensation on the optical components may have a visible effect on the output images. To reduce the risk of condensation:

• Find a warmer storage location.
- Attach the ARRI air-drying cartridge (silica bottle) to the PL-Mount of the camera during storage
- Note: Do NOT leave the air-drying cartridge attached to the PL-Mount during transportation of the camera!
- If the camera needs to be stored in a place that is considerably cooler than the location where it will be used, consider keeping the camera powered from a mains unit in addition to using the air-drying cartridge.
- In ambient temperatures above 30^ C/ 86^ F and/or humidity above 60%, always attach the air-drying cartridge to the PL-Mount of the camera when not in use. This not only applies to storage, but also to shooting breaks and situations when the camera remains without an attached lens for an extended time.
- MAKE SURE THE SILICA BOTTLE IS SECURELY FASTENED. UNDER NO CIRCUMSTANCES SPILL SILICA INTO THE LENS PORT!

8 Power Supply

• Use only ARRI-recommended power supply solutions.
- Manipulation of power supplies could result in serious injury or death, or damage to the ALEXA.

The ALEXA accepts an input voltage range from 10.5 to 34 V DC. Do not supply power outside the specified voltage range. The camera can be powered through the BAT connector or battery adapters accepting V-Lock or Gold Mount batteries.

The power supply should deliver an output of more than 90 W to power the camera sufficiently. The power draw of the camera in basic configuration is about 85 W.

A 12 to 15 V battery should have at least 6 A maximum output current.

NOTICE

• When powering accessories through the camera, the total power draw of the camera is increased by the amount of power drawn by the accessories.
• Always keep the BAT connector or attached battery accessible so that they can be unplugged quickly in case of emergency.

8.1 Power Management

When using the BAT connector and one or more onboard battery adapters simultaneously, the camera's power management system ensures that the power source with the highest voltage level is used. When the voltage level of one power source drops below the level of the other, or a power source is disconnected from the camera, the power management system automatically switches to the other power source, avoiding shutdown of the camera.

For example, a 12 V onboard battery can be used as backup for the main 24 V battery. Using a 12 V onboard battery in addition to the main 24 V battery also allows for quick switchover to handheld mode—the power cable can simply be disconnected from the BAT connector.

When using two onboard battery adapters (with batteries in parallel—one on top and one on the back), the camera will treat them as a single source. When used this way, the load is spread across two batteries, creating a strong power source.

8.2 BAT Connector

The BAT connector is the primary power input on the ALEXA. It is a Fischer 2-pin socket located at the back of the camera on the camera-right side.

The socket accepts power cables KC-20S and KC-29S. The cables can either be connected to the mains unit NG 12/26R or to 24 V cine-style batteries with three-pin XLR outputs. Do not use cables longer than 4m.

Close-up of a black electronic device component with a metallic connector and labeled 'BAT' (no other text or symbols visible)

Fig. 1: BAT connector

8.3 Mains Unit NG 12/26 R

Use of the mains unit is recommended for shooting in the studio and when using electronic accessories with high power consumption.

To power the ALEXA using the Mains Unit NG 12/26 R:

1. Set the correct mains voltage on the mains unit using the fuse on the back of the unit. For example, set it to 220 V if the AC mains power source is 220 V.
2. Connect the mains unit to AC mains power.
3. Ensure that the camera power is turned off.
4. Set the voltage switch on the mains unit to 26 V.
5. Connect the battery cable KC-20S or KC-29S (spiral cable) to the power supply socket on the camera and the 26 V socket on the mains unit.

NOTICE

The NG 12/24 R was the original design that provided 12 & 24 volts output – it was superseded by the NG 12/26 R, which outputs 12 & 26 volts. The NG 12/24 R can easily be upgraded to NG 12/26 R specification at an ARRI service center.

8.4 Cine-Style Batteries

Any 24 V cine-style battery with a three-pin XLR output can be used to power the camera through a KC-20S or a KC-29S battery cable.

To connect the battery to the camera:

1. Ensure that the main switch on the camera is off.
2. Connect the battery cable KC-20S or KC-29S (spiral cable) to the power supply socket on the camera and the 28V output on the battery.

NOTICE

When the battery voltage drops below the warning level, the BAT1 level in the camera display will start flashing. A white i will appear, signaling more information is available on the INFO screen. For more information on setting the low battery warning level, see Menu>System>Power (on page 110).

8.5 Onboard Batteries

The camera can be equipped with adapters for either V-Lock or Gold Mount video-style batteries. When a battery equipped with the TI-protocol for battery communication is used, the ALEXA will display remaining capacity as a percentage on the HOME screen. For these batteries, the user does not need to set the battery warning level.

Four different adapters are available:

• BAB-G: Battery Adapter Back for Gold Mount batteries
• BAB-V: Battery Adapter Back for V-Lock batteries
• BAT-G: Battery Adapter Top for Gold Mount batteries
• BAT-V: Battery Adapter Top for V-Lock batteries

NOTICE

Adapters must be installed by a trained technician!

8.5.1 V-Lock Batteries

V-Lock batteries from different manufacturers may be used on the ALEXA. When batteries from manufacturers such as ID-X and bebob are used, their remaining capacity will be displayed as a percentage on the HOME screen.

To attach a V-Lock battery:

1. Align the v-shaped wedge on the battery with the v-shaped notch on the battery plate.
2. Press the battery downwards until you hear a click.
3. Check that the battery is securely mounted on the battery plate.

To release a V-Lock battery:

1. Press the release button on the camera-left side or top of the battery (manufacturer dependent).

2. While pressing the release button, slide the battery upwards.

Two black industrial electrical modules with visible mounting holes and a label 'UR 00013' on the right (no readable text or symbols on the modules themselves)

Fig. 2: ALEXA with BAB-V and V-Mount battery

NOTICE

Not all V-Lock batteries deliver enough power to supply the camera. Use only batteries with a capacity of 90 Wh or more to prevent damage to the battery and unpredictable camera behavior. Any camera-battery combination should be tested prior to use, especially when accessories are powered through the camera.

8.5.2 Gold Mount Batteries

If the ALEXA is equipped with a Gold Mount, Anton/Bauer batteries can be used. Their remaining capacity will be displayed as a percentage on the HOME screen.

To attach a Gold Mount battery:

1. Align the three pins on the back of the battery to the three corresponding holes on the battery plate.
2. Press the battery to camera-right until you hear a click.
3. Check that the battery is securely mounted on the battery plate.

To release a Gold Mount battery:

1. Press the release button on the camera-left side of the battery plate.
2. While pressing the release button, slide the battery camera-left, and pull it straight out.

Two black electronic device modules labeled 'DIONIC 180' with gold connectors, shown from front and side views (no readable text beyond branding)

Fig. 3: ALEXA with BAB-G and a Gold Mount battery

NOTICE

Not all Gold Mount batteries deliver enough power to supply the camera. Use only batteries with a capacity of 90 Wh or more to prevent damage to the battery and unpredictable camera behavior. Any camera-battery combination should be tested prior to use, especially when accessories are powered through the camera.

8.6 Power Outputs

The ALEXA SXT EV has two 24 V power outputs and one 12 V power output for accessories. ALEXA SXT Plus, ALEXA SXT Studio and ALEXA SXT W models have three 24 V power outputs and one 12V power output.

Close-up of a camera module with labeled ports and connectors (no readable text or symbols beyond labels)

Fig. 4: 24 V outputs (RS) and 12 V output

8.6.1 Powering 12 V Accessories

One 12 V output with a 2-pin LEMO connector is located on the right side of the camera. It is limited to 12 V and can supply a device with a current of up to 2.2 A, depending on the camera power supply.

8.6.2 Powering 24 V Accessories

Two 24 V remote start/stop (RS) outputs with 3-pin Fischer connectors are located on the right side of the camera. They can supply two devices with a combined load of up to 2.2 A (shared with the EXT connector power out), depending on the camera power supply. When the camera is powered from a source with a voltage below 24 V, they output 24 V. If the camera's power source supplies more than 24 V, this voltage level is also present on the RS outputs.

Besides powering accessories, the RS outputs can also be used to send a remote start/stop signal to the camera.

9 Camera Support

9.1 Minimum Equipment Recommended For Operation

• ALEXA SXT EV camera body and Lens Adapter PL mount
• Electronic Viewfinder EVF-1
• Viewfinder Mounting Bracket
• KC 150-S Viewfinder Cable short 0.35m/1.2ft
• CCH-1 Center Camera Handle
- BP-12 Bridge Plate with base plate, or BPA-1 with BP-5/BP-8 Bridge Plate and base plate, or WA-1 Wedge Adapter and Quick Release HD Baseplate
- SD card
• Compatible power supply
• Suitable media for recording

9.2 Tripod and Remote Heads

Tripod and remote heads must have adequate load ratings to support the ALEXA and attached accessories. See the dimensional drawings and weights for your camera model in the Appendix of the manual.

NOTICE

Always check the payload limits of a remote head and crane before mounting a camera.

In applications where the camera mount is subject to high forces (e.g. car or helicopter mounts) the camera must be additionally secured with appropriate safety restraints. All mount screws must be tightened firmly with an appropriate screwdriver (not with the commonly used coin!).

9.3 Electronic Viewfinder EVF-1

Close-up of a black Alexi camera with lens and control buttons (no visible text or symbols)

The electronic viewfinder EVF-1 employs a liquid crystal on silicon (LCOS) imaging device with a temperature-stabilized LED light source to provide a bright, accurate view of the sensor image in all operating conditions. Each EVF-1 is calibrated to precisely match the image on the ALEXA's HD outputs.

The EVF-1 has a resolution of 1280x720 pixels, with 32 additional lines of resolution above and 32 below the image to display camera status information. The EVF-1 can also display a 10% surround view area of the sensor to help the operator track unwanted elements before they enter the recorded image area. Focus can be checked by temporarily zooming into the image with a magnification factor of 2.25x. The low-latency interface of the EVF-1 has a delay of less than 1 frame.

The EVF-1 has button controls for false color check and zoom, as well as buttons and a jogwheel to control EVF and camera settings.

Connect the viewfinder to the camera using the viewfinder mounting bracket.

Exterior view of a black ARRI camera with visible control panel and sensor components (no text or symbols on body)

NOTICE

Do not point the viewfinder into direct sunlight, very bright light sources, or high-energy light sources (e.g. laser beams)! This may cause permanent damage to the viewfinder display and optical elements. If possible, cover the eyepiece when not in use to prevent any damage.

9.3.1 Viewfinder Cables

The viewfinder cables are unidirectional with a male plug to connect to the camera and a female plug to connect to the viewfinder.

Cables are available in the following lengths:

Model Length	(m / ft)	Suggested use
KC-150-S 0.35 /	1.2 For use of EV	F-1 on camera left side in hand-held mode
KC-151-S 0.65 /	2.1 For use of EV	F-1 on camera right side or when using Viewfinder Extension Bracket VEB-1 or VEB-3
KC-152-S 2.00 /	6.6 Longest possible length for use with specialty rigs

Coiled black cable with metallic connectors and orange connectors, no visible text or symbols

Fig. 5: EVF cables: KC-150S (center), KC-151S (middle), KC-152S (outer)

9.3.2 Viewfinder Mounting Bracket

The Viewfinder Mounting Bracket VMB-3 is attached to the camera using two captive 3mm hex socket head screws on top of the camera at the front. The VMB-3 features a leveling bubble and two internally threaded 15mm rods with standard 60mm distance. These can be exchanged for or extended with standard 15mm rods for mounting matte boxes, lens motors and the like above the lens if need be.

Attach the EVF-1 to the Viewfinder Mounting Bracket by sliding the dove tail into the receptacle and closing the lever on the EVF-1.

The position of the EVF-1 can be adjusted by loosening the levers on the Viewfinder Mounting Bracket, adjusting the position as desired and closing the levers to retighten.

The EVF-1 can be mounted on the camera-right side by unscrewing the threaded end cap on the side-to-side adjustment rod, removing the rod itself and inserting it from the other side. Remember to reattach the threaded end cap.

NOTICE

Camera-right operation is not possible with the standard EVF cable KC-150-S. Instead, the longer cable KC-151-S is needed.

Exterior view of a black ARRI camera module with visible control buttons and antenna (no text or symbols on main body)

The Viewfinder Extension Bracket VEB-3 extends the mounting point of the EVF-1 further back. It can be attached to a tripod head for use with geared heads or greater comfort when using fluid heads using its standard attachment point for the ARRI Eyepiece Leveler EL-3. The VEB-3 has been improved over the VEB-1 in the following aspects:

• The redesigned shape provides greater sturdiness at a lighter weight.
- The blue security pin at the VMB-3 connecting end prevents the VEB-3 from accidentally dropping out when it is released.
- The connection part to the Eyepiece Leveler EL-3 is spring loaded so that it automatically moves away from the camera body when it is not in use.
- The VEB-3 features a fold-out arm that can be used to rest the VEB-3 on the camera body when moving the camera.

To avoid damage to the VMB-3 when using the VEB-3 with an eyepiece leveler, loosen the friction on VMB-3's rotating assembly.

Mechanical component with black frame and adjustment knobs, no visible text or symbols

Fig. 6: VEB-3 with closed fold-out arm

Mechanical device with articulated arms and mounting bracket (no visible text or symbols)

Fig. 7: VEB-3 with opened fold-out arm

Exterior view of a black ARRI camera with articulated arm and sensor array (no visible text or symbols)

9.4 Center Camera Handle CCH-1

The Center Camera Handle CCH-1 is attached to the camera top with three captive 3mm hex socket head screws (two at the front and one at the back). Ensure that the CCH-1 is securely fastened before attempting to lift the camera.

Exterior view of a black ARRI (Advanced Radar System) device with control panel and display screen (no readable text or symbols beyond branding)

Close-up of a black industrial electronic component with a cylindrical top and mounting base (no visible text or symbols)

The Handle Extension Block HEB-2 mounts to the front end of the CCH-1 and adds one more focus hook to the camera in a high position, allowing the tape measure to clear the matte box.

Close-up of a mechanical device with a cylindrical component and mounting bracket (no visible text or symbols)

9.5 Side Camera Handle SCH-1

The Side Camera Handle SCH-1 is used in conjunction with a BAT-V or BAT-G top-mounting battery adapter, or with third-party onboard recorders. It is attached to the camera using three captive 3mm hex socket head screws (two at the front and one at the back). Ensure that the SCH-1 is securely fastened before attempting to lift the camera.

If a tall battery or a tall third-party onboard recorder is used, the adjustable center grip of the SCH-1 can be replaced by the taller Adjustable Center Grip Tall (ACG-2).

Black mechanical device with dual cylindrical components mounted on a stand (no visible text or symbols)

Fig. 8: SCH-1

9.6 Bridge Plates BP-12/BP-13

The bridge plate BP-12 for 19 mm studio rods has been specifically developed for ALEXA. It mounts directly to the camera body using two 3/8"/16 screws and ensures that support rods, matte boxes and follow focus units are positioned properly in regards to the optical center of the camera, just like all other ARRI cameras.

Close-up of two black mechanical components with mounting holes and a cylindrical housing, shown from different angles (no text or symbols visible)

The bridge plate BP-13 is equivalent to the BP-12, but for 15 mm studio rods.

NOTICE

Make sure bridge plates are tightened firmly with a wide bladed screwdriver, not the commonly used coin!

9.7 Bridge Plate adapter BPA-1

The bridge plate adapter BPA-1 can be used to attach a BP-3/BP-5/BP-8/BP-9 to ALEXA. First attach the BPA-1 to the camera with the two screws. Then attach the bridge plate to the adaptor with its two screws. Make sure the screws are tightened firmly with a screwdriver.

Close-up of four mechanical components with mounting holes and connectors, shown from different angles (no text or symbols visible)

9.8 Wedge Adapter WA-1 and Quick-Release Plate QR-HD-1

The WA-1 can be mounted at the same position as a bridge plate. It has a dove tail that slides into the counter part of a quick-release plate, like the ARRI QR-HD-1. The quick-release plate has a pin at its back, which fits into the pin receptacle at the back of the camera base.

Close-up of a black industrial electrical connector with internal components and a blue housing (no visible text or symbols)

Fig. 9: ARRI QR-HD-1

9.9 Levelling Block LB-1

The Leveling Block LB-1 attaches to the bottom of the ALEXA in the pin receptacle on the back foot. It prevents the camera from resting on a rear-mounted battery when a bridge plate is attached and the camera is placed on a flat surface.

Attach the LB-1 by inserting its pin into the pin receptacle at the end of the shoulder arc in the camera base. Twist the knob clockwise to tighten.

Black plastic mechanical clip with a circular top and threaded base (no text or symbols visible)

Fig. 10: Leveling Block LB-1

9.10 Shoulder Pad SP-3

The camera base has an integrated arch to fit to the operator's shoulder. For extended handheld shots, the shoulder pad SP-3 can be attached to the base of the camera with velcro.

NOTICE

The SP-3 can only be used with a BP-12 and 19 mm rods or with 15 mm rods and a Wedge Adapter WA-1 and a Quick-Release Plate QR-HD-1. When using the BPA-1 with a BP-5/BP-8, the bridge plate has to be removed prior to attaching the SP-3.

Black plastic mechanical component with a textured grip and curved base (no text or symbols visible)

Fig. 11: SP-3 shoulder pad

Close-up of a black electronic device casing with visible internal components and mounting base (no text or symbols)

Fig. 12: SP-3 below camera

10 Connectors

Camera back

NOM OUT 10 RET/PMI 16 EXT NOM OUT 2 NOM OUT 3 EXT ELOW

From top to bottom: MON OUT 1A, RET/SYNC IN, EXT, MON OUT 2, MON OUT 3, BAT, ETHERNET

Camera right

Close-up of a camera module with labeled ports and connectors (no readable text or symbols beyond labels)

Fig. 13: Connectors on right side

From left to right, top to bottom: 2x RS (24 V) out, AUDIO OUT, TC, 12V out, AUDIO IN, SD CARD (camera bottom)

Camera left

Exterior view of a ARRI video camera with external camera and control panel (no visible text or symbols)

Camera front

Close-up of a mechanical control panel with buttons and a red 'REC' button (no readable text beyond labels)

Fig. 14: Camera front

EVF connector

10.1 BAT

The BAT connector can be used to power the camera from an external power source with cables KC-20S and KC-29S.

It is located at the back of the camera on the camera-right side.

10.2 RET SYNC IN

A return signal from another image source can be fed into the ALEXA's RET connector for displaying on EVF and/or MON OUT. The signal must be a 1920x1080 422 1.5G single link according to SMPTE 274M and 292M. The output routing of the RET in signal can be set in the Monitoring menu. The SYNC IN function has not been implemented.

The connector is located at the back of the camera on the camera-right side.

10.3 MON OUT 1/2/3

The MON OUT connectors are BNC connectors capable of carrying a 1920x1080422 YCbCr 1.5G HD-SDI signal with frame rates of 23.976, 24, 25, 29.97 or 30 fps according to SMPTE standards 274M and 292M. The signal format can be changed in the Monitoring menu.

The connectors are located at the back of the camera on the camera-right side.

10.4 EXT

The EXT connector is a multi-pin accessory connector that carries signals for communication with various accessories and 24V power. The maximum power output is 2.2A, shared with the RS outputs.

Cables are currently available for:

• Connecting a UMC-3 remote motor controller (model UMC Connection Cable (0.80m/2.6ft) K-UMC3-ALEXA)
• Connecting two ALEXA cameras for synchronized operation (model EXT to EXT Cable (2.00m/6.6ft) KC 155-S)

The connector is located at the back of the camera on the camera-right side.

10.5 ETHERNET

Standard Ethernet connectors cannot deliver the durability and reliability required by ARRI, so the ALEXA uses a specially designed 10-pin LEMO connector. The ARRI KC-153-S cable is required to connect the Ethernet socket to a standard RJ-45 Ethernet port.

The Ethernet port can be used to operate two ALEXA cameras with synced settings by connecting the cameras with a KC 156-S cable, or to connect the Remote Control Unit RCU-4 to the camera.

The Ethernet connector can output 24 V with 1.2 A power.

The connector is located at the back of the camera on the camera-right side.

10.6 EVF

The EVF connector connects the camera to an EVF-1 electronic viewfinder. The signals on this connector are proprietary and can only be used to drive an EVF-1. This proprietary signal assures low latency for the viewfinder image.

The connector is located at the front of the camera on the camera-left side.

10.7 AUDIO IN

2-channel analog line-level audio can be fed to the camera via the 5-pin XLR connector located at the front of the camera on the camera-right side.

The ALEXA converts the audio signal from analog to 24 bit 48 kHz PCM.

10.8 RS

The two RS connectors supply external accessories with at least 24 V power and a combined load of up to 2.2 A (shared with the EXT connector power out). The sockets also accept an ARRI remote start/stop trigger.

The connectors are located at the front of the camera on the camera-right side.

10.9 12 V

The 12 V connector supplies an external accessory with 12 V power and up to 2.2 A current.

The connector is located at front of the camera on the camera-right side.

10.10 TC

The TC connector is a 5pin LEMO socket. It accepts and distributes a Longitudinal Time Code (LTC) signal.

It can be used to

• jam-sync the ALEXA's time code to a Clockit, TC Slate or another camera
  • transmit the ALEXA's time code to a Clockit, TC Slate or another camera
• tune the frequency of the ALEXA's crystal oscillator with an Ambient ACC Clockit Controller

The connector is located at the front of the camera on the camera-right side.

Note that during playback, the timecode that is output via the TC connector does not match the timecode of the played clip.

10.11 AUDIO OUT

The AUDIO OUT is a 3.5mm TRS connector (headphone jack), which outputs audio fed to the 5-pin XLR AUDIO IN connector with a maximum power of 2.5 dBm.

The connector is located at the front of the camera on the camera-right side.

NOTICE

Connecting headphones to the camera while recording can cause a short audio signal interruption due to static electricity.

10.12 SD Card

The ALEXA saves data such as user setups, frame grabs and system logs to an SD card. Firmware, additional frame lines and ARRI Look File 2 files are loaded onto the camera from the SD card. The SD card slot is located on the bottom of the camera on the camera-right side. To access the SD card slot, slide the door towards the front of the camera.

SD Card Requirements

• SD or SDHC card (most brands are compatible)
• maximum capacity of 4GB
• FAT or FAT32 format

NOTICE

• Keep the SD card slot door closed to prevent dirt and moisture from entering the camera.
• After booting the camera or inserting an SD card, it might take some seconds until the SD card is recognized and usable.

The SD card can be formatted on the ALEXA or the following folder structure can be created manually on a computer. The SD card must be properly formatted prior to its first use.

SD CARD Name Date Modified Size Kind ARRI May 2, 2011, 1:33 PM -- Folder ALEXA May 2, 2011, 1:33 PM -- Folder Firmware May 2, 2011, 1:33 PM -- Folder Framelines May 2, 2011, 1:33 PM -- Folder Grabs May 2, 2011, 1:33 PM -- Folder LDA May 2, 2011, 1:33 PM -- Folder Licenses May 2, 2011, 1:33 PM -- Folder LookFiles May 2, 2011, 1:33 PM -- Folder Setups May 2, 2011, 1:33 PM -- Folder SEARCH FOR Today Yesterday Fast Week All Images All Movies All Documents © items, 3.79 GB available

Fig. 15: Folder structure required for SD card

To format an SD card on the ALEXA:

1. Press the MENU button.
2. Using the jogwheel, select System.
3. Select SD Card.
4. Select Format + prepare SD card.
5. Press both FORMAT buttons simultaneously. The ALEXA will create the required folder structure on the SD card after formatting.

NOTICE

Formatting the SD card will irreversibly remove all data on the SD card.

To create the required folder structure on the SD card in the ALEXA without formatting:

1. Press the MENU button.
2. Using the jogwheel, select System.
3. Select SD Card.
4. Select Prepare SD card. The ALEXA will create the required folder structure on the SD card without formatting or deleting any data.

NOTICE

Firmware update files are recognized by the camera anywhere within the structure, but it is recommended to copy them into the Firmware folder.

10.13 Recording Module

Exterior view of a modern ARRI camera with visible lens and control panel (no text or symbols on body)

The ALEXA records clips using the recording module on the camera-left side. For every recording medium type, the respective adapter needs to be inserted before a medium can be inserted. The media slot can take SXR Capture Drives with the SXR Capture Drive Adapter, XR Capture Drives with the XR Capture Drive Adapter, SxS PRO and SxS PRO+ cards with the SxS Adapter 2, or CFast 2.0 cards with the CFast 2.0 Adapter 2.

When the ALEXA is in ProRes mode, it can record onto SXR/XR Capture Drives, SxS PRO cards, SxS PRO+ cards, or CFast 2.0 cards. They do not need to be loaded or unloaded, but can be used directly after insertion and can be safely removed whenever they are in standby.

When the ALEXA is in ARRIRAW mode, it can only record onto SXR/XR Capture Drives, which need to be loaded after insertion and unloaded prior to removal. Refer to the respective sections below for more information.

The ALEXA supports recording to the following media:

• SxS PRO+ cards 256 GB (SBP-256D, SBP-256E)
• SxS PRO+ cards 128 GB (SBP-128B, SBP-128C, SBP-128D, SBP-128E)
• SxS PRO+ cards 64 GB (SBP-64B, SBP-64C)
• SxS PRO cards 64 GB (SBP-64A)
• LEXAR 3600x CFast 2.0 cards 256 GB
• SXR Capture Drives in 1 TB or 2 TB
• XR Capture Drives 512 GB

To access the media slot, slide the OPEN slider towards camera back so that the spring-loaded door jumps open.

Putting the lock slider in the (lower) lock position prevents accidental opening of the door. Ensure that the lock slider is in the (upper) unlocked position before attempting to open the door.

NOTICE

• Keep the door closed to prevent dirt and moisture from entering the camera.
• Only Sony SxS PRO and SxS PRO+ cards can be used with ALEXA. Sony SxS-1 cards are not supported.
• For the remainder of this manual, whenever SxS PRO is mentioned, this applies to SxS PRO+ likewise.
• SXR Capture Drives are specified for a temperature range from 0° Celsius to 70° Celsius (32° Fahrenheit to 158° Fahrenheit). When working in environments with ambient temperatures below 0° Celsius, ensure that SXR Capture Drives have a temperature of at least 0° Celsius when starting a recording to ensure proper operation.
• While we do everything we can to assure reliable functioning of different recording medias such as SXR Capture Drives, and while the mean time before failure (mtbf) for drives is excellent, a failure that results in loss of data may occur at any time. Therefore, you are obliged to implement and maintain at any time adequate and necessary data security measures and back up drive content as soon as possible. ARRI assumes or accepts no liability or responsibility for data loss or data corruption, or any other damages, loss or harm due to malfunction of recording drives.

Inserting media:

To insert an adapter:

1. Insert the adapter into the media slot with the contacts facing the front of the camera and the metal housing facing out (away from the camera body).
2. Push the adapter towards camera front until the two securing plastic lids lock the adapter.

To load an SXR/XR Capture Drive:

1. Insert the SXR/XR Capture Drive into the media slot with the contacts facing the front of the camera and the ribbed side facing out (away from the camera body).
2. Push the SXR/XR Capture Drive towards camera front until the lock engages.
3. Close the door.

When the camera is in ARRIRAW mode, it automatically loads the SXR/XR Capture Drive when the door has been closed, see "Explanation of LED States" below. If closing the door is not possible, e. g. because it has been damaged, loading an SXR/XR Capture Drive can also be triggered by pressing and holding the eject button for about five seconds.

Loading an SXR/XR Capture Drive in ARRIRAW mode normally only takes a few seconds. In certain situations, however, it may take up to 30 seconds, especially when an SXR/XR Capture Drive has been removed previously without unloading it properly.

NOTICE

Do not put any labels or adhesive tape on the back of an SXR/XR Capture Drive (the side facing the camera body). The SXR/XR Capture Drive must have full contact to the camera body to ensure proper heat conduction.

To load an SxS PRO card or CFast 2.0 card:

1. Insert the card into the adapter with the contacts facing the front of the camera and the label facing out (away from the camera body).
2. Push the card in against the spring until the lock engages.
3. Close the door.

NOTICE

• Do not force any media into the slot or into the adapter in wrong orientation—the contacts could be damaged.
  • Do not force the door closed if the media is not fully inserted.

Removing media:

When the camera is in ProRes recording mode, SxS PRO cards, CFast 2.0 cards and SXR/XR Capture Drives do not have to be mounted or unmounted—they can be inserted or removed whenever the camera is in STBY mode. If media is removed during recording, only the last second of the current clip will be lost. All clips on the media will remain accessible.

When the camera is in ARRIRAW recording mode, SXR/XR Capture Drives need to be unloaded before they can be safely removed. Unloading is triggered automatically when the door is opened and the SXR/XR Capture Drive is in standby. When the door is already open, but the SXR/XR Capture Drive is still loaded, press the eject button on the SXR/XR Capture Drive to trigger unloading. See "Explanation of LED States" below for information about how the camera signals loading state. If media is removed during recording, only the last five seconds of the current clip will be lost. All clips on the media will remain accessible.

NOTICE

• If the recording process is interrupted by power loss or media removal, transfer all the data from the media and format it before using it again.
• If the door is opened while an ARRIRAW recording is running, the recording is stopped and the medium is unloaded.

Before removing any media, open the door by sliding the OPEN slider towards camera back. Ensure the lock slider is in the (upper) unlocked position, otherwise the OPEN slider will be blocked.

To remove an SXR/XR Capture Drive:

▶ Carefully pull the SXR/XR Capture Drive towards camera back, taking care not to drop it accidentally.

To remove an SxS PRO card or CFast 2.0 card:

▶ Push the card inwards (towards camera front) until the lock disengages, then pull the card out backwards, taking care to prevent the card from dropping out of the adapter.

To remove an adapter:

▶ Carefully lift the two securing plastic lids that secure the adapter and pull it towards camera back, taking care not to drop it accidentally.

CAUTION!

It is possible that SXR/XR Capture Drives will get hot to the touch during extended operation and can cause pain or even burns if held for too long. It is advisable to handle the drive for no more than three seconds, and to remove the drive quickly and carefully. Allow it to cool before further handling and consider wearing protective gloves.

Explanation of LED States

SXR/XR Capture Drives, SxS Adapter 2 and CFast 2.0 Adapter 2 have an LED that signals the media's state to the user.

LED state Card state
Off	No media presentMedia is unreadable (e.g. wrong file system)Media is inactive
Solid green Media is in standby and ready
Solid red Media is being accessed	(read/write)DO NOT REMOVE MEDIA!
Red flashing Media error, see camera for details
Blue flashing(SXR/XR Capture Drive only)	SXR/XR Capture Drive is being loaded or unloaded
Solid blue(SXR/XR Capture Drive only)	SXR/XR Capture Drive is unloaded and can be ejected safely

11 Lens Mounting

The ALEXA is equipped with an interchangeable lens mount.

NOTICE

Lenses must cover an image circle of at least 27.3 mm for 16:9 sensor mode, 29.7 mm for 4:3 sensor mode and 33.5 mm for Open Gate sensor mode to prevent vignetting.

11.1 Lens Adapter PL-Mount LA-PL-2

The ALEXA lens mount supports the ARRI Lens Data System. An LDS lens must be mounted in the 12 o'clock or 3 o'clock position to enable the LDS functions. Take care not to damage the LDS contacts on the lens and the camera when mounting or unmounting a lens or lens port cover.

The LA-PL-2 also offers basic Cooke /i support for direct lens metadata capture through the LDS contacts. The cameras can store a subset of lens data (focus distance and lens iris settings) as dynamic camera metadata. Running the camera outside the standard speeds of 23.976 to 30 fps may produce an offset of several frames. Certain lens settings will produce an offset lens data readout (e.g. iris open). This can be corrected manually, after the metadata had been extracted (ARRI Meta Extract).

The basic /i compatibility has been tested and approved by Cooke Optics Limited. For support and questions about /i Technology, please contact Cooke Optics directly.

To mount a PL-mount lens:

1. Turn the bayonet ring anti-clockwise until it stops.
2. Remove the lens port cap.
3. Carefully insert the lens into the lens port. Align the notch in the lens flange with the index pin on the mount, keeping the lens rotated into a position where the lens markings are visible from either side of the camera.
4. Press the lens flange flat onto the lens mount.
5. Turn the bayonet ring clockwise until the lens is locked securely.
6. Ensure that the lens is properly mounted.

NOTICE

• When no lens is attached to the camera, use the lens port cap to prevent dust from entering the lens cavity.
• The sophisticated design principle of the camera's optical module delivers outstanding images with a cinematic look and feel, but also makes the imager sensitive to contamination. Dust particles that have settled on the sensor cover glass during a lens change may become visible as dark spots in the output image, similar to lint leaving marks on exposed film. The degree of this effect depends on the aperture of the lens.

Close-up of a circular optical or laser component with a green lens and metallic components (no visible text or symbols)

Fig. 16: Lens adapter PL-Mount LA-PL-2 (with LDS)

11.2 Lens Support

Heavy lenses may require additional lens support. Using a lens support guarantees that the weight of the lens will not influence the flange focal depth and reduces stress on the lens mount.

To support a lens use 15mm studio or 19mm studio rods and an appropriate lens bridge. 15mm studio rods require a bridge-plate with 15mm studio rod support, such as a BP-3/BP-9 + BPA-1, while 19mm studio rods require a bridge-plate with 19mm studio rod support, such as a BP-12 or BP-5/BP-8 + BPA-1.

Mount the lens bridge LS-10 for 15 mm studio rods by pushing it onto the rods from the front. Mount the lens bridge LS-9 for 19 mm studio rods by clipping it on the rods from the top.

Slide the bridge into position on the rods directly under the lens support ring on the lens, and fix it in place by tightening the lever on its side. Align and tighten the center screw in the lens support ring, adjusting the height of the center screw with the lever on the back of the lens bridge.

Exterior view of a black ARRI camera module with dual-axis motors and control panel (no visible text or symbols)

12 In-Camera Filter Module IFM-1

The In-Camera Filter Module IFM-1 is standard to all ALEXA SXT models (except ALEXA SXT Studio), which replaces the conventional reflex tube that is located inside the PL lens mount tube with the IFM filter holder and allows the use of ARRI Full Spectrum Neutral Density (FSND) filters (available separately).

By using internal filters you can rate the camera at the base sensitivity of EI 800 without the need for external filters, even in bright light conditions. In-camera filters for IFM-1 can be used with a large variety of lens sizes and are much lighter than external ND filters.

CAUTION!

DO NOT POINT THE CAMERA INTO DIRECT SUNLIGHT, VERY BRIGHT LIGHT SOURCES, OR HIGH-ENERGY LIGHT SOURCES (e.g. laser beams)! This may cause permanent damage to the internal filter or the camera.

NOTICE

Internal filtration requires additional shimming and does not work with ALEXA SXT Studio. For PL mount lenses, the IFM-1 filters work only with a lens mounting depth of 31.50 mm maximum.

Benefits of in-camera filtration

Filtering behind the lens rather than in front reduces weight, reflections and operational complexity. The filters' in-camera position significantly reduces the camera's total and front weight (because internal filters are smaller and lighter than external ones).

Also, internal filters are far less exposed to damage than external ones and, since lenses are changed more frequently than ND filters, the FSND filters provide extra protection for the sensor.

The Full Spectrum Neutral Density (FSND) filters for IFM-1 are based on new technologies that assure highest image quality. An absorptive full spectrum ND coating attenuates the light while maintaining a perfectly neutral color balance at all densities.

A base of water-white optical glass, precision-polished to create perfectly parallel surfaces, guarantees a clear and sharp image.

Additional broadband anti-reflective multi-coating reduces internal reflections and ensures a high image contrast. FSND filters for IFM-1 are available in eight densities from ND 0.3 to ND 2.4 and can be purchased separately or in sets.

All benefits at a glance:

• Internal filtration reduces reflections, weight, hassle – and filter damage
  • New high-tech filters based on white-water optical glass
  • Internal filtration protects sensor
  • Available in 8 densities from ND 0.3 to ND 2.4
  • Neutral color balance at all densities through absorptive full spectrum ND coating
  • High image sharpness through precision polishing
  • High contrast through anti-reflective multi-coating
• IFM-1 filter holder is standard to all ALEXA SXT models (except ALEXA SXT Studio)

12.1 Safety instructions for in-camera filtration

Proper shimming is crucial for the safe use of in-camera filters. Only correct shimming ensures the proper flange focal depth.

12.1.1 Maximum lens mounting depth

Only cameras with the original IFM-1 Shim allow for 31.50 mm maximum lens mounting depth of PL mount lenses, when using in-camera filters.

To avoid damage or injury when using PL mount lenses, use only lenses that do not exceed the following dimensions:

45° 45° 45° Ø14 Ø33,3 Ø37,3 Ø54 12 20,35 30,9 31,5

Fig. 17: Allowed lens dimensions with in-camera filters

NOTICE

The original ARRI IFM/Extenders Depth Gauge (K2.72144.0) will help you stay within allowed lens dimensions. Please ask your local ARRI Service Partner.

For a safe and correct use of internal filters, always shim your camera properly.

• Observe all precautions and use only proper tools, lenses and materials
  • For PL mount lenses, use only lenses with 31.50 mm maximum mounting depth

CAUTION!

Risk of damage and injury from improper lenses!

PL mount lenses with more than 31.50 mm mounting depth, might damage internal filters and the camera. Shards from broken filter glass might cause injury.

Always check the lens mounting depth before mounting or changing a lens.

CAUTION!

Risk of damage and injury from insufficient shimming!

All internal filters require a properly shimmed lens mount. Otherwise, even PL mount lenses with a nominal mounting depth of less than 31.50 mm might damage internal filters and the camera. Shards from broken filter glass might cause injury.

To ensure maximum allowable lens mounting depth, and to avoid damage or injury, always shim your camera correctly (see page 55).

The proper IFM-1 Shim comes with all three FSND Filter Sets (Basic, Full or Completion) and is also available individually. Use only this original shim when filtering with IFM-1.

CAUTION!

Risk of damage from improper tools, materials or negligence!

In-camera filters are very delicate. Always handle them very carefully and with proper tools (e.g. the original Ground Glass/Frameglow tool). Never touch the filter glass with bare fingers (sweat and physical contact might damage the sensitive coating).

Check and clean each filter before and after use. Store it properly. Use only original ARRI cleansing utensils and materials (others might damage the filter).

12.1.2 Basic precautions

When using IFM-1 and internal filters:

1. Ensure a clean, dust-and-moisture-free environment.
2. Wear fresh rubber gloves to avoid fingerprints and smear.
3. Place the camera on a flat, level and safe surface.
4. Never touch the sensor.
5. Work very carefully due to the delicate nature of tools/components.
6. Safely store all tools/components afterwards.
7. Shim you camera exactly to required flange focal depth.
8. Check each lens mounting depth and flange shape.
9. Use only lenses within allowed dimensions.

12.1.3 Required shimming and maximum lens mounting depth

Only proper shimming will ensure the maximum allowable lens mounting depth (see page 51):

• For safe use of in-camera filters, always prepare your camera with the original IFM-1 Shim.
  • See "Shimming the lens mount", page 55.

12.2 Available FSND Filter Sets

Three different FSND sets are available:

• FSND Filter Set (Basic): Basic set of filters and tools
• FSND Filter Set (Completion): Complementary set of filters
• FSND Filter Set (Full): Complete set of filters and tools

12.2.1 FSND Filter Set (Basic)

The FSND Filter Set (Basic) contains all components and filters essential for in-camera ND filtering:

• Storage Case
  • IFM Optical Clear (1) ND 0.0
  • Ground Glass/Frameglow tool (2)
  IFM Shim (3)
  • IFM/Extenders Depth Gauge (4)
  • Microfiber Cloth (5)
  • Eight 0.1 mm washers (also available separately as K4.0000762)
  • Three Internal Filters (6) FSND 0.6, 1.2, 1.8
  • Cleaning Instructions

Technical diagram of a mechanical gear assembly with numbered components and internal gears

Fig. 18: The FSND Filter Set (Basic)

12.2.2 FSND Filter Set (Completion)

The FSND Filter Set (Completion) is a useful completion. It offers:

• 5 Internal Filters FSND 0.3, 0.9, 1.5, 2.1, 2.4

3D rendered image of a black cylindrical mechanical component with multiple grooves (no text or symbols)

Fig. 19: Each filter of the FSND Filter Set (Completion) comes in a practical individual box and is also available separately

To insert or change a filter:

See "Mounting in-camera filters", page 61. Each filter is also available separately or in bundles.

12.2.3 FSND Filter Set (Full)

The FSND Filter Set (Full) is a set with all FSND filters and required tools. It consists of:

Storage Case
IFM Optical Clear (1) ND 0.0
• Ground Glass/Frameglow tool (2)
IFM Shim (3)
• IFM/Extenders Depth Gauge (4)
- Microfiber Cloth (5)
• Eight 0.1 mm washers (also available separately as K4.0000762)
• Eight Internal Filters (6) FSND 0.3, 0.6, 0.9 1.2, 1.5, 1.8, 2.1, 2.4
• Cleaning Instructions

Technical diagram of a mechanical assembly with numbered components for identification

Fig. 20: The FSND Filter Set (Full) for ALEXA XT

To insert or change a filter:

See "Mounting in-camera filters", page 61. Each filter is also available separately or in bundles.

12.3 Shimming the lens mount

In-camera filtration will change your flange focal depth. Therefore, all internal filters require a properly shimmed lens mount (see page 51).

NOTICE

Use only the original shim IFM Shim when filtering with IFM-1.

To compensate for the change in flange focal depth due to the shim, always insert the IFM Optical Clear filter when no filtering is needed.

When the camera is no longer shimmed for IFM-1, the glassless IFM Empty Filter Frame must be placed back into the filter position.

General shimming precautions:

• Fix the IFM Shim properly between lens lock and lens mount.
• The shim's inscription must face camera-outwards.
- Mount all proper shims correctly without omitting, adding or losing any. Otherwise, the flange focal depth will not be correct.
• Mark your cameras shimmed for IFM-1 to avoid confusion.

Once the camera is shimmed for IFM-1: Immediately replace the IFM Empty Filter Frame with an FSND filter or the IFM Optical Clear filter.

Store the IFM Empty Filter Frame in a safe place: When the camera is no longer shimmed for IFM-1 in the future, the IFM Empty Filter Frame must be placed back into the filter position.

If you de-shim the camera: Immediately replace the IFM Optical Clear filter or any other FSND filter with the IFM Empty Filter Frame.

To compensate for the change in flange focal depth due to the shim:

▶ Always use the IFM Optical Clear filter when no filtering is needed.

Tools needed:

TX6 torx screwdriver

To shim the mount:

1. Remove lens or lid (1) from the PL lens mount and turn the lens lock into position CLOSED (2).

Technical diagram of a mechanical device with labeled parts, showing component 1 and part 2 with visible internal structure.

1. Unscrew (only with a TX6 torx screwdriver!) the four accessible torx screws (1) that hold the lens lock (the other two torx screws are still hidden by lock position CLOSED).

Technical diagram of a mechanical device with numbered components labeled 1, 2, and dashed lines indicating assembly or alignment.

1. Turn the lens lock into position OPEN (2) to unhide and unscrew the other two torx screws (1).

Technical diagram of a mechanical device with labeled parts 1, 2, and a central circular component

1. Remove the lens lock (1) from the PL mount. Keep all installed shims (if any) carefully in place (2):

Technical diagram of a mechanical assembly with labeled parts 1 and 2, showing a circular component with internal components and a dashed line indicating alignment.

1. Remove the LDS pin support and MCA print (2) by unscrewing the four TX6 torx screws (1).

Technical diagram of a mechanical assembly with labeled parts 1 and 2, showing internal components and alignment indicators.

1. Add two 0.1 mm washers (1) on each of the four positioning pins (see detailed section).

Technical diagram of a mechanical assembly with labeled parts and an inset view showing internal components.

1. Reattach the LDS pin support and MCA print (2) by fastening the four TX6 torx screws (1) hand-tight.

Technical diagram of a mechanical assembly with labeled parts 1 and 2, showing internal components and alignment indicators.

1. Accurately place the IFM Shim, with its inscription always facing camera-outwards (2), onto the PL mount. The shim's screw holes must line up exactly with the mount's thread holes and the index pin (3):

1 2 3 WITH FILTER

1. Fasten the lens lock, still in position OPEN (2), back to the PL mount; use two of the six torx screws (1) hand-tight:

Technical diagram of a mechanical device with labeled parts 1, 2, and a central component marked '标准盒'

1. Turn the lens lock into Position CLOSED (2) and fasten the other four torx screws hand-tight (1). Check if all screws and the shim fit correctly:

Technical diagram of a mechanical device with numbered components and labeled parts

1. Before mounting a lens, always check its mounting depth (see "Safety instructions for in-camera filtration", page 51 and "Maximum lens mounting depth", page 51)

NOTICE

Make sure the LDS connection between lens and camera's PL mount works properly. If not, add more washers (see step 6).

12.4 Mounting in-camera filters

Internal filters are very delicate. Before you mount or change a filter, check the lens mounting depth (see "Safety instructions for in-camera filtration", page 51 and "Maximum lens mounting depth", page 51).

NOTICE

By default, the filter position in the lens mount of the ALEXA SXT (except ALEXA SXT Studio) is occupied by the IFM Empty Filter Frame. This glassless filter ring must be replaced by a real filter or IFM Optical Clear filter, once the camera is shimmed for IFM-1 use (see page 55)

Tools needed:

Ground Glass/Frameglow tool

To insert or change an in-camera filter:

1. Remove the lens or lid (1) from the PL lens mount (2).

Technical diagram of a mechanical device with labeled parts 1 and 2, showing internal components and assembly.

1. Carefully screw the Ground Glass/Frameglow tool (1) into the filter ring's (2) thread hole in the 12 o'clock position (1).

Technical diagram of a mechanical device with labeled parts 1 and 2, showing internal components and wiring.

1. Pull the filter (2) from the bottom ring in the camera's PL mount. If the filter position is held by an IFM Empty Filter Frame, remove it likewise.

Diagram of a camera module with labeled parts, showing lens and cable assembly

1. Clean the removed filter and stow it properly in its individual box and the storage case. If the filter position was held by an IFM Empty Filter Frame, store it likewise (in case the camera is no longer shimmed for IFM-1 in the future).

2. Place the removed filter into its padded filter box (2) in the storage case (3). Remove the Ground Glass/Frameglow tool (1) to pick up the next filter.

Technical diagram of a mechanical assembly with numbered components and labeled parts

1. Make sure the next filter is clean (2) and the Ground Glass/Frameglow tool is in the 12 o'clock position (1).

Diagram of a camera module with labeled parts, showing lens and cable assembly

1. Place the next filter onto the bottom ring in the camera's PL mount. The Ground Glass/Frameglow tool has to be in the 12 o'clock position (1).

Technical diagram of a mechanical device with labeled parts 1 and 2, showing internal components and wiring.

1. Align the filter ring's main notch with the bottom ring's red nut in the 6 o'clock position. To ensure an accurate fit, align the filter ring's other notches with the two red noses in the bottom ring's 10:30 and 1:30 positions.

2. After the magnetic filter ring has audibly snapped into position, carefully unscrew the Ground Glass/Frameglow tool. The filter has to sit precisely on the bottom ring.

3. Mount a lens (observe maximum lens dimensions!), or cover the PL lens mount properly with its lid (1).

NOTICE

• All internal filters require a properly shimmed lens mount (see page 55).
To compensate for the change in flange focal depth due to the shim, always insert the IFM Optical Clear filter when no filtering is needed.
When the camera is no longer shimmed for IFM-1, the glassless IFM Empty Filter Frame must be placed back into the filter position.
- Internal filtration does not work with ALEXA SXT Studio. For PL mount lenses, IFM-1 works only with a lens mounting depth of 31.50 mm maximum.

12.5 Filter cleaning

Tools needed:

• Cleaning Instructions
- Fresh rubber gloves
- Micro bellows
. Cotton swab
• Purified alcohol
• Microfiber Cloth from FSND Filter Set

To clean the filters:

NOTICE

To avoid in-camera damage, always clean all filters outside of camera.

1. Ensure a clean, dust-and-moisture-free environment
2. Wear fresh rubber gloves to avoid fingerprints and smear
3. Never touch the sensor
4. Check the coating for dirt, smear and scratches
5. Remove sand, dust or solid particles with micro bellows
6. Clean off oil, grease or smear with a cotton swab (or the microfiber cloth) slightly wetted in purified alcohol only

13 Camera Controls

The ALEXA can be controlled through three user interfaces:

Main controls Location: camera-right sideInterface: 3-inch LCD-screen with floating-function buttons, a jogwheel to navigate through menus and adjust parameters, and a range of fixed-function buttons.

Operator controls Location: camera-left sideInterface: three assignable function buttons plus three fixed-function buttons for easy operator access.

EVF controls Location: Electronic Viewfinder EVF-1Interface: fixed function buttons and a jogwheel for adjustment of viewfinder parameters and primary shooting parameters.

13.1 Main Controls

The main controls can be used to set all camera parameters.

USER MENU PLAY INFO GRAB TC LOCK REC ON/OFF HOME BACK ARRI® SD CARD

Fig. 21: Main controls

13.1.1 Display

The 3-inch LCD has a resolution of 400x240 pixels. The back-lit, transflective display has exceptional contrast even in bright sunlight.

To adjust the LCD brightness:

▶ On the HOME screen, rotate the jogwheel while pressing the BACK button.

A plastic shield protects the display from scratches. It can be removed by pulling it off the four pins.

13.1.2 Screen Buttons

Six screen buttons are located above and below the LCD display. Their function varies depending on the screen content and is shown directly above or below each button. If no function is shown above or below a button on the LCD, it has no function for that screen.

As a failsafe, operations that cannot be reversed and can result in the loss of data require pressing two buttons simultaneously to confirm the operation.

13.1.3 HOME screen

The HOME screen is the ALEXA's default screen. It shows the most important camera parameters and gives quick access to changing them through the screen buttons. To return to the HOME screen from any menu in the camera, press the HOME button.

NOTICE

To adjust the LCD brightness from the HOME screen, rotate the jogwheel while pressing the BACK button.

Screen buttons

Button Function
FPS Sets the frame rate of the sensor.
AUDIO Shows the current audio level. If AUDIO is set to Off, the audio input is switched off: no audio is embedded in the HD-SDI outputs, and no audio tracks are recorded onto internal media. The same applies if AUDIO is disabled, which is the case if the sensor frame rate is different from the project fps setting (for example, while over- or undercranking).
SHUTTER Sets the shutter angle of the sensor. Shutter angle and sensor fps determine exposure time of the sensor in seconds by the following equation: angle / (360 * fps).
EI Sets the exposure index rated in ASA. The ALEXA has a base sensitivity of 800 ASA.Note: ASA rating is identical to ISO rating.Note: Exposure Index is not applied to ARRIRAW signals.
COLOR Opens the color screen, where gamma and look settings for internal recording, MON OUT 1/2/3 and EVF can be changed.
WB Sets the camera's white balance. This is the color temperature of the light source that the ALEXA is currently adjusted for. In addition to the red/blue correction of the white balance, the ALEXA can also compensate for a green/magenta tint. This value, called CC (color compensation), is shown as an exponent of the WB value. Positive values are marked with a "+" and negative values with a "-".The user can execute an automatic white balance by pressing the AUTO WB button in the WB screen.

Camera Status Section

TC Displays the current time code including the source (INT: internal, EXT: external source). Frames are not displayed. The time-base of the time code is shown after the @ sign.
	Camera is set to Ext sync: MASTER
	Camera is set to Ext sync: SLAVE
	Settings sync is active
BAT 1 The voltage level of the power source present at the BAT connector, or the remaining capacity of an attached battery in percentage if it transmits this information.
BAT 2 The voltage level of a battery attached to the onboard battery adapter, or the remaining capacity of an attached battery in percentage if it transmits this information.
REEL Identifies the current reel with the camera index letter, such as A or B and the reel number.
CLIP Identifies the current clip with the clip index and clip number.
DUR Displays the duration (i.e. screen time in relation to project rate) of the current clip while recording or of the last recorded clip while in standby, in the format h:mm:ss.
	The camera is in standby and ready to record.
	The camera is recording.
	The camera is prerecording.
	An error occurred and recording is not possible. Press the INFO button for more information.If nothing is shown, the camera has detected no errors, but no media is present for recording.
SXR Drive	Type of inserted media (SXR/XR Capture Drive, SxS PRO, CFast 2.0)
00:16:53	During standby, shows remaining capacity of the inserted media in hours, minutes, and seconds. It is calculated for the current framerate and codec.*During recording, shows remaining length for current clip in hours, minutes, and seconds, prefixed with 'C'.Shows media status when media is not ready for recording.

* When recording is set to ProRes, the value shown is the minimum available recording time for the current sensor frame rate and codec combination. Apple ProRes™ is a variable bit rate codec, so the actual remaining recording time depends on the image content. The remaining time is updated during recording. After stopping recording, the remaining time may skip a few seconds because some media space is needed for file management.

NOTICE

Media that has been formatted with a newer or older SUP version may not be recognized correctly and be shown as invalid, or may trigger the warning "files not consistent". In this case, backup any data from the media and format it in-camera.In SUP 1.0, the maximum size of a single clip is limited to about 229 GB. Therefore, the camera shows a little 'C' (for clip) next to the clock icon as soon as recording starts, and it counts down the remaining time for the current recording. During standby, the camera shows the remaining capacity for the whole medium.

COLOR Section

Day4NightREC:Log C

Name of the selected ARRI Look File 2 fileSelected gamma for recording path

Icons

Name Icon Description
General Warning Imp		Information is waiting on the INFO screen.
General Error An error		ccurred. Check the INFO screen for more information.
Temperature Warning		There is a minor sensor-temperature offset. Image quality may be slightly affected.
Temperature Error		There is a substantial sensor-temperature offset. Image quality may be seriously affected.
Lock The Main Control	locked.
SD Card An SD card	ent. The icon turns orange when the card is accessed.
Grab The GRAB icon	while a still frame is being taken and written to the SD card.
High Humidity Mode		The sensor is in High Humidity mode (i.e. the sensor is kept at 40°C sensor temperature to avoid condensation).
Radio The ARRI Wire	remote System (WRS) radio is active.
		The wireless network/WiFi radio is active.
		The ARRI Wireless Remote System (WRS) radio and the wireless network/WiFi radio are active.

NOTICE

A sensor temperature warning or error after boot-up is normal, as it takes a few seconds for the sensor to reach its preset temperature.

13.1.3.1 Lists and User Lists

On the HOME screen, press the FPS, SHUTTER, WB (white balance) and EI (exposure index) buttons to open lists of preconfigured values for each setting.

User-defined values can be added to the FPS, SHUTTER and WB lists. The EI list is fixed and user-defined values cannot be added. It contains values from 160-3200 ASA in steps of 1/3 stops.

Setting a list value

Fig. 22: SENSOR FPS screen

Any value in a list may be set. Invalid values will appear grayed out.

To set a list value:

1. Rotate the jogwheel to select the desired list value.
2. Press the jogwheel to set the list value.

Adding a list value

If the desired list value does not appear in the list, a user-defined value can be added.

To add a list value:

1. Press the ADD button.
2. On the ADD screen, use the jogwheel and + or - buttons to enter a new list value.
3. When you are finished entering the new list value, press the jogwheel to add it to the list.

NOTICE

Each list supports a maximum of 16 entries. To add new user-defined list values to a full list, you must delete previously added user-defined list values.

Deleting a list value

User-defined list values that are no longer required can be deleted.

To delete a list value:

1. Press the DELETE button.
2. On the DELETE screen, use the jogwheel to select the user-defined value you wish to delete.
3. Press both DELETE buttons simultaneously.

NOTICE

Preconfigured values cannot be deleted and will appear grayed out on the DELETE screen.

DELETE SENSOR FPS

23.976 fps 24.000 fps 25.000 fps

Default entries cannot be deleted

Figure 23: DELETE SENSOR FPS screen

NOTICE

The EI list is static and cannot be changed by the user. It contains ASA values from 160-3200 ASA in steps of 1/3 stop.

13.1.3.2 FPS

Press the FPS (frames per second) button on the HOME screen to open the SENSOR FPS list screen, which lists the default frame rates as well as user-defined frame rates.

NOTICE

Access to this screen is disabled during record.

The maximum frame rate that can be set is dependent on the type of media and the codec.

If the desired frame rate cannot be set because it is grayed out, change the codec to one with a lower data rate.

There are shortcut buttons on the FPS screen for CODEC, INFO and SDI FPS. In the SDI FPS screen, MON OUT 1/2/3 frame rates can be adjusted within the limits of their current format.

The MON OUT should match the sensor frame rate. If the sensor frame rate exceeds the available MON OUT frame rates, set the MON OUT to half the sensor frame rate if possible to maximize the smoothness of the image when panning and tilting.

To correctly set frame rates for the MON OUT:

1. Press the MENU button.
2. Using the jogwheel, select the Monitoring menu.
3. Select MON OUT.
4. Set Frame rate to the same frame rate as the sensor frame rate. If the sensor frame rate exceeds the range of the available MON OUT frame rates, set the MON OUT frame rate to half the value of the sensor frame rate.
5. Press the HOME button to exit.

13.1.3.3 AUDIO

Press the AUDIO button on the HOME screen to open the AUDIO screen. This screen shows the ALEXA's two audio channel levels. The audio levels are displayed from -45 dBFS to 0 dBFS.

NOTICE

No audio meters are displayed on the HOME screen or AUDIO screen when audio is set to Off or audio is disabled. Audio is disabled when the sensor frame rate does not match the project frame rate. In this case, no audio is transmitted via HD-SDI.

Light blue markers show reference levels of -20, -18 and -9 dB FS.

Red markers at levels -1 and 0 dBFS warn of clipping. With proper audio signal levels, the red markers should almost never be visible.

Fig. 23: Audio screen

Gain can be applied to the audio channels by turning the jogwheel to set both channels, or by pressing the CH 1+, CH 1-, CH 2+ and CH 2- buttons. The amount of gain applied by the camera is indicated next to the levels as light gray numbers.

NOTICE

When adjusting audio input levels, a "clicking" noise can be heard on audio outputs. Adjustment of audio levels therefore is disabled during recording.

Press the OPTIONS button to open the AUDIO IN>OPTIONS screen and set audio parameters.

AUDIO IN>OPTIONS
Record	On
Channel 1 level	Manual
Channel 2 level	Manual
Channel 1 source	L in
Channel 2 source	L in
Soundroll (=Tape)	>

Fig. 24: AUDIO IN>OPTIONS screen

Option Description
Record Turns audio recording	On or Off.If audio recording is switched off, no audio is recorded internally, HD-SDI contains no audio and Audio out is muted.
Channel 1 level Manual allows the user to manually apply gain to the input signal on channel 1 to reach a correct level.Unity matches a 4 dBu input signal to -20 dBFS. This setting leaves enough headroom for recording and avoids audio clipping. When Unity is selected, audio levels cannot be adjusted by the user.
Channel 2 level Manual allows the user to manually apply gain to the input signal on channel 2 to reach a correct level. Unity matches a 4 dBu input signal to -20 dBFS. This setting leaves enough headroom for recording and avoids audio clipping. When Unity is selected, audio levels cannot be adjusted by the user.
Channel 1 source Select the left or right input signal as the source for Channel 1.
Channel 2 source Select the left or right input signal as the source for Channel 2.
Soundroll (=Tape) Enter a name for the sound roll (also known as Tape in the menus of some recorders) of an external audio recorder, for easier sound synching in post-production. The name will be written to the FCP XML file and the Avid Log Exchange (ALE) file on the recording media.

AUDIO OUT Left: Ch 1+2 Right: Ch 1 OPTIONS MAX MIN -

Fig. 25: Audio out screen

Press the AUDIO OUT button to open the AUDIO OUT>OPTIONS screen where the global volume for both Audio out channels can be adjusted. The OPTIONS button opens a list of AUDIO OUT options.

AUDIO OUT>OPTIONS
Left out	Channel 1+2
Right out	Channel 1
Audio out level	Unity max.

Fig. 26: AUDIO OUT>OPTIONS

Left out Sets which channel is routed to the left output.
Right out Sets which channel is routed to the right output.
Audio out level	Set the level of the audio out channels manually, or set it to fix the maximum output.

NOTICE

• These settings do not influence the audio signal embedded in the HD-SDI connectors or recorded in QuickTime clips. They only affect the AUDIO OUT connector.
• ALEXA automatically determines the internal signal run time and matches audio and images so they are always in sync. When changing sensor fps or project fps, it may take up to 2 seconds for the camera to resync image and audio signals.

13.1.3.4 SHUTTER

Press the SHUTTER button in the HOME screen to open the SHUTTER ANGLE screen.

NOTICE

Access to this screen is disabled during record.

The list of default shutter angles includes 11.2°, 22.5°, 45.0°, 90.0°, 172.8°, 180.0°, 270.0° and 358.0°. User-defined shutter angles can be set by pressing the ADD button. The exposure time for the current frame rate and shutter angle is indicated in seconds at the bottom of the SHUTTER ANGLE screen.

The shutter angle range is 5.0^ to 358.0^ up to 60 fps and 5.0^ to 356.0^ above 60 fps. Below the list, the actual exposure time at the currently set frame rate is shown.

NOTICE

Be aware that the combination of long exposure times (a low sensor frame rate and large shutter angle) and high exposure indexes can lead to image artifacts! Try to avoid exposure times longer than 1/25th of a second for maximum image quality.

DELETE SHUTTER ANGLE 45.0° 90.0° 172.8° 180.0° 270.0° Exposure time @ 24.000 fps: 1/50 s ADD

Fig. 27: Shutter list

13.1.3.5 EI

The Exposure Index (EI) is the applied sensitivity of the camera.

The ALEXA has a base sensitivity of 800 ASA. This means that the dynamic range is almost evenly distributed above and below neutral gray with low noise in the shadows and clean, smooth clipping behavior in the highlights.

Due to its high dynamic range, the ALEXA's sensitivity can be set from 160 to 3200 ASA in steps of 1/3 stops while maintaining high image quality.

EXPOSURE INDEX

500 ASA

640 ASA

800 ASA

1000 ASA

1280 ASA

Fig. 28: Exposure Index screen

NOTICE

The Exposure Index list has fixed content, meaning that it cannot be changed by the user.When changing the EI setting during recording, one or more frames on the recorded material may show artifacts resulting from the change.An area that is overexposed more than eight stops above clipping can appear darker than its surroundings.

Applying the exposure indexes at the extremes of the range will nonetheless have an influence on the images. At low exposure indexes, such as 160 ASA, the dynamic range below neutral gray increases, reducing noise even further. At the same time, the dynamic range above neutral gray is slightly reduced. Highlight clipping itself is not influenced by this, but the shoulder of the gamma curve will get slightly steeper, reducing the smoothness of the change from almost overexposed to overexposed.

At high exposure indexes, such as 1600 ASA, the images behave in the opposite way. Noise is increased, which makes it important to judge shadow detail, while there will be even more headroom in the highlights.

EI 160 ^+5.2-9.3 EI 200 ^+5.6-8.9 EI 400 ^+6.6-7.9 EI 800 ^+7.8-6.7 EI 1600 ^+8.6-5.9 EI 3200 ^+9.7-4.8

13.1.3.6 COLOR

The ALEXA SXT comes with very powerful color processing capabilities that can be configured on the COLOR screen. As the possible combinations of color processing parameters may become quite complex, ARRI provides a white paper titled "ARRI Look Management in ALEXA SXT", available for download on the ARRI ALEXA webpage.

Press the COLOR button to open the COLOR screen. The COLOR screen displays an overview of the color management settings applied to the camera's output paths, including:

• the current processing setting of internal recording
• a link to the processing settings of EVF and MON OUT 1/2/3
• the currently set ARRI Look File 2
• a link to the MON OUT color space configuration

If the ARRI Look File 2 file has been modified via an external Camera Access Protocol (CAP) enabled software, but is not yet saved, the look file name is appended by an asterisk.

COLOR
REC processing	Log C
EVF/MON processing	>
Look file	ARRI 709>
MON OUT color spaces	>

Processing defines the type of processing that is applied to the image path. The following list describes which image processing settings are available. Note that in case of ARRIRAW recording, REC processing is always set to ARRIRAW and cannot be changed.

Log C Log C is a	logarithmic gamma based on the Cineon format for output to film print or digital intermediate. Color-grading is a required post-production step in the Log C workflow. Standard broadcast monitors cannot properly display Log C images so a conversion look up table (LUT) is necessary for display, dailies and editing proxies. Log C images will appear flat and desaturated when displayed on standard broadcast monitors. ALEXA preview LUTs can easily be generated using the ARRI LUT Generator, a web application available on www.arri.com.
Look file The ARRI Look File 2 file that has been selected is applied on the respective image path.
ALEXA Classic 709	The ALEXA performs an image processing that is similar to the behavior of an ALEXA XT or ALEXA Classic with SUP 11.This setting is mainly useful if a standard REC 709 conform image should be output on the respective image path, but a more creative ARRI Look File 2 file has been loaded, e.g. for recording.This setting is not available for internal recording.

MON OUT color spaces

The MON OUT color spaces screen allows to configure the color space for MON OUT 1/2/3. This setting must match the color rendering capabilities of the connected monitors, otherwise color clipping may occur.

ARRI Look File 2 files

ARRI Look File 2 files are a way for the user to alter the parameters the ALEXA uses when converting the sensor image data to a video color space. This can be described as applying a custom "look" to the different image output paths. The ARRI Look File 2 file can be applied directly to the recorded image (destructive workflow), or just to the monitoring paths and included in the clip as metadata only (non-destructive workflow).

The ALEXA comes with several pre-installed ARRI Look File 2 files, including LCC 709, where LCC stands for Low Contrast Curve and 709 denotes the target color space. This ARRI Look File 2 file contains a custom tone map curve that creates a video image with lower contrast compared to the standard REC 709 output. As a

result, the image holds as much dynamic range information as possible, without using Log C encoding. Highlight and shadow detail that would be lost in the typical REC 709 tone mapping can still be accessed.

ARRI Look Creator, a free application from ARRI, and some third-party applications can be used to create ARRI Look File 2 files, which can be based on frame grabs taken with the ALEXA.

To apply an ARRI Look File 2 file:

1. On the HOME screen, press the COLOR button.
2. Select Look file from the menu.
3. Using the jogwheel, select an ARRI Look File 2 file from the list on the LOOK FILES screen. The default preloaded ARRI Look File 2 is ARRI 709.
4. Press the jogwheel to set the ARRI Look File 2.
5. On the COLOR screen, set the processing to Look file.

NOTICE

If REC gamma is set to Look file, the recorded image on the internal media will be permanently altered by that ARRI Look File 2 file.

Additional ARRI Look File 2 files can be added to the ALEXA from the SD card. The ARRI Look File 2 files must be copied into the lookfiles folder on the SD card. The required folder structure on the SD card can be created via MENU>System>SD card>Prepare SD card.

To add an ARRI Look File 2 files to the camera:

1. On the HOME screen, press the COLOR button.
2. Select Look file from the menu.
3. Press the ADD button.
4. Using the jogwheel, select an ARRI Look File 2 file from the list on the LOOK FILES (SD CARD) screen.
5. Press the jogwheel to add the ARRI Look File 2 file. The ARRI Look File 2 file will be added to the list on the LOOK FILES screen.

To delete an ARRI Look File 2 file from the camera:

1. On the LOOK FILES screen, select an ARRI Look File 2 from the list.
2. Press the DELETE button.
3. Press both new DELETE buttons simultaneously. The ARRI Look File 2 file will be deleted from the camera but will remain on the SD card.

Playback and ARRI Look File 2 files

During playback, the camera makes a distinction between clips recorded in ARRIRAW, Log C, or Look processing.

When a clip recorded in ARRIRAW or Log C is played back and an output is configured for Look processing, the look will be applied to this output. Please note that this is the currently enabled ARRI Look File 2, as the camera does not take into account which ARRI Look File 2 was active when the clip was recorded. It is the responsibility of the user to make sure the correct ARRI Look File 2 is applied during playback.

When a clip recorded with Look processing is played back, no ARRI Look File 2 will be applied by the camera during playback. For the duration of that clip, ARRI Look File 2 files will be disabled.

13.1.3.7 WB

White Balance (WB) is the color balance of the camera that should be set to the value appropriate for the light in use. There are three methods for setting the white balance:

• white balance presets
• user-defined white balance
• automatic white balance

On the HOME screen, press the WB button to open the WHITE BALANCE screen. The ALEXA has the following white balance presets:

Tungsten 3200K 0CC
Fluorescent 4300K 0CC
Daylight 5600K 0CC
Daylight Cool 7000K 0CC

White balance is a red-blue adjustment of the image. To adjust the green-magenta balance, use the color compensating (CC) adjustment.

For example, a fluorescent source will have peaks in its spectrum that cannot be corrected with the traditional white balance. The CC shift can correct these peaks up to a full green or full magenta gel. One step of CC SHIFT is equal to 035 Kodak CC values or 1/8 Rosco values.

NOTICE

When changing the WB setting during recording, one or more frames on the recorded material may show artifacts resulting from the change.

DELETE RENAME ADD WHITE BALANCE Auto WB 3900K -3CC Tungsten 3200K OCC Fluorescent 4300K OCC Daylight 5600K OCC AUTO WB

Fig. 29: WHITE BALANCE screen

ARRI recommends adjusting white balance and color compensation using appropriate measuring equipment such as a vectorscope with calibrated grey card or a color meter.

If the desired white balance setting does not appear in the WHITE BALANCE list, a user-defined white balance can be added.

To add a white balance:

1. On the HOME screen, press the WB button.
2. Press the ADD button.
3. Rotate the jogwheel to adjust the white balance value in steps of 100K or press the +1000K and -1000K buttons.

4. Press the jogwheel or <> button to select the CC adjustment.

5. Rotate the jogwheel to adjust the CC value.

6. Press the jogwheel to add the new white balance to the WHITE BALANCE list.

To perform an automatic white balance:

1. On the HOME screen, press the WB button.
2. Press the AUTO WB button.
3. Place a well-lit grey card in the center of the image and press the AUTO WB button. The ALEXA will calculate the white balance and color compensation values and set these values for the "Auto WB" entry in the list.

Note: The automatic white balance will be overwritten each time a new one is calculated.

Note: If the grey card is significantly over- or underexposed, the ALEXA may not be able to calculate a white balance value and will display an error message.

1. Place grey card in image center

1. Press button to calculate Auto WB

AUTO WB

To rename a white balance:

1. On the HOME screen, press the WB button.
2. Using the jogwheel, select the name of the white balance you wish to rename.
3. Press the RENAME button.
4. Use the jogwheel to enter a new name.
5. Press the DONE button to save the new name.

Aa ERASE CLEAR ALL SET NAME A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9 0 - _ [ ] . < > DONE

Fig. 30: WB SET NAME screen

NOTICE

Default white balance values cannot be renamed.

13.1.4 Function Buttons

The main controls feature the following function buttons:

ON/OFF Press	once to switch the camera on. Press and hold for 5 seconds to switch off the camera. A countdown will be displayed on the HOME screen. If the button is released before the countdown has elapsed, the camera does not switch off.
REC Press to start and stop internal recording. See section Prerecording for behavior in prerecording mode.
LOCK Press and hold for 3 seconds to lock or unlock the main camera controls and function buttons. The recessed function buttons USER, REC and ON/OFF cannot be locked and remain available. A lock symbol on the HOME screen indicates that the lock is engaged.
GRAB Press to take a still frame and write it to the SD card. The write process is indicated by a flashing camera icon, followed by a flashing SD card icon on the HOME screen. When writing is finished, a new still frame can be taken.
TC Press to open the TIMECODE screen.
WRS Press to open the Wireless Remote System screen. Available on ALEXA SXT Plus, ALEXA SXT Studio, and ALEXA SXT W.
PLAY Press to open the playback screen and activate playback on MON OUT and EVF. When the playback screen is opened, the last clip on the internal media that is on active standby will be loaded automatically.
INFO Press to open the LIVE INFO screen. The LIVE INFO screen displays the camera's current system state and any current error messages. On the LIVE INFO screen, there are buttons to access the following additional information screens:VERSIONMEDIASYSTEMSAVE TO SD (press to save a log file)FPS INFO
USER Press to open the USER BUTTONS screen. There are six user buttons that can be assigned by the user. Buttons 1, 2 and 3 are shared with User Buttons 1, 2, and 3 in the operator controls. Press the jogwheel to see a complete list of user button options.
MENU Press to open the MENU screen, where most camera settings can be adjusted.
BACK Press to go back to the previous menu or screen when navigating. Press to cancel settings adjustments and revert to the previous setting.
HOME Press to return to the HOME screen from any menu or screen.

13.1.4.1 TC

Press the TC button to open the TIMECODE screen. The TIMECODE screen displays the current timecode and timecode format settings.

SET TC

TIMECODE

00:00:00:00

Format: Int TC

Rec Run

Regen

23.976 fps

OPTIONS

USER BITS

PROJECT

Fig. 31: Timecode screen

NOTICE

Individual frame values are not shown but are still counted.

Press the SET TC button to set the TC counter (only when the timecode source is set to Int TC). On the SET TIMECODE screen, press the SET 2 TIME button to match the counter to the camera's system clock. Press the RESET button to reset counter to zero.

The PROJECT button is a quick link into the PROJECT menu screen, where project fps can be adjusted. Project fps sets the time base of the time code.

TIMECODE OPTIONS

Press the OPTIONS button to open the TIME CODE OPTIONS screen.
Select Source to choose the timecode source. Available sources are:

Int TC Internal TC counter

Ext LTC TC is read from the LTC input. Only possible with Mode set to Free Run, and the project frame rate must match the sensor frame rate.

Select Mode to define how the timecode is counted. Available modes are:

Rec Run TC will	only run while recording. The TC value increases with every frame generated by the sensor while recording in the project time base.
Free Run TC runs	free. If the source is set to Int TC, and the sensor frame rate does not match the time base of the TC, the value counts up with every new frame generated by the sensor in the project time base.

Select Generator to set the camera's timecode generator. Available generators are:

Regen Rec Run

TC is regenerated from the last valid TC value. When set to Ext LTC, the camera continuously reads the TC signal at the LTC connector as long as it is present. Upon disconnection or loss of signal, the camera continues counting on its own. When the external signal is reconnected, the camera uses the values of the external signal again.When set to Int TC, the value increases with each new frame generated by the sensor.

Jam sync Only E

Ext LTC can be jam sync'd. To perform a jam sync, connect the external TC source to the camera. The camera then reads the external TC count and continues counting on its own; the external TC source can be removed again. The precise crystal oscillator in the ALEXA will count accurately for up to eight hours. After eight hours, perform another jam sync to prevent timecode offset.The camera can be sync'd to TC signals whose time base differs from the camera's project time base, as long as both are integer (24, 25 and 30 fps) or non-integer (23.976 and 29.97 fps) signals. It is not possible to mix integer and non-integer signals.

NOTICE

• It is recommended to jam-sync after every shooting break to avoid the risk of losing timecode sync during a shot.
• The camera will keep its TC and TC tuning values for about 10 minutes after disconnection from the power source. If a power source is connected, the camera will remember its TC for as long as the power source is connected, even if it is switched off.

Select User bit source to set the source of the user bits. Available user bit sources are:

Internal User bits	are set manually in the User Bit screen.
UB in Ext TC When the timecode source is set to Ext LTC, the user bits are sampled from the external signal.

NOTICE

• The camera will force timecode to Int TC and Regen if the sensor frame rate does not match the project frame rate.
• Non-integer TC time base settings 23.976 and 29.97 are always counted as non-dropframe time code.

USER BITS

Press the USER BITS screen button to access the USER BITS screen. For each user bit, values from 0 to 9 and A to F can be set.

Press the SET UB button to start editing the user bits values.

SET UB

USER BITS

00:00:00:00

User bits source: Internal

Fig. 32: USER BITS screen

NOTICE

• On HD-SDI out, the last two digits of the user bits contain the Variflag, therefore the last two user bits cannot be set by the user.
• User bits are not stored in user setup files. When loading a user setup file, they are reset to 00:00:00:00.
  • Check user bits after changing the sensor mode.

13.1.4.2 INFO

STATUS Info

The STATUS INFO screen displays information about the current state of the camera system. System state: Good means that all components in the ALEXA are functioning normally. Other messages can contain error messages prefixed with E:, or warnings prefixed with W:. For more information about error messages and warnings, see "Warning and Error Messages" in the Appendix.

Press the SAVE TO SD button to save a system log to the SD card. This may take up to one minute.

NOTICE

It is only necessary to save a system log if the camera experiences multiple error messages or other abnormal behavior. The system log is not a human-readable file and should be sent to an ARRI Camera Service center for analysis.

LIVE INFO

VERSION

MEDIA INFO

System state: Good

SYSTEM

SAVE TO SD

FPS INFO

VERSION Info

Cam serial no.	The serial number of the camera.
Cam ID Translation of the camera serial number to Base36, with an additional prefix for 3D applications. This encoding of the serial number has been chosen so it can be part of each filename while using the fewest number of characters.
Firmware Version number of the currently installed camera Software Update Packet (SUP).
EVF serial no.	The serial number of the Electronic Viewfinder EVF-1 attached to the camera.
EVF firmware	Version number of the Electronic Viewfinder EVF-1 firmware.

LIVE INFO

VERSION

MEDIA INFO

Cam serial no.

2010

Cam ID

1JL

Firmware

SXT_1.0:35937

EVF serial no.

16

EVF firmware

1.27

SYSTEM

FPS INFO

Fig. 33: VERSION info screen
MEDIA Info

Int. Rec. Mode Current mode for internal recording.

Adapter type Type of the inserted storage adapter

Status Current status of internal media.

Free capacity Free storage space displayed as a percentage.

Max. fps current Maximum frame rate with current codec.

Size Total available storage space on media

Firmware version Firmware version of the media

LIVE INFO

VERSION

MEDIA INFO

Int. Rec. Mode

ProRes 4444 XQ

Adapter type

SXR Drive

Status

STBY

Free capacity

87%

Max. fps current

120fps

Size

510GB

Firmware version

MRV5.2DB

SYSTEM

FPS INFO

SYSTEM Info

Time/Date Current	date and time. To set the date and time, press the MENU button, select SYSTEM and select DATE/TIME.
Fan speed Speed	of the camera's cooling fan in rotations per minute.
Sensor mode	Shows the active sensor mode: 16:9, 4:3, 6:5, or Open Gate.
Sensor temperature	Current temperature of image sensor. Target is 35°C in standard mode, 40°C in high humidity mode.
IP address IP address of the camera's Ethernet port.
Operating time	Shows the total operating time of the camera in hours (since first installation of SUP 4.0 or higher)

LIVE INFO	VERSION	MEDIA INFO
Time/Date	13:02:07 / 2013-02-20
Fan speed		1350 rpm
Sensor mode		16:9
Sensor temperature		35.0°C
IP address		169.254.1.24
Operating time		2 h
SYSTEM		FPS INFO

Fig. 34: SYSTEM info screen

FPS Info

The FPS Info screen displays an overview of the current frame rates set in the camera and the maximum frame rate possible on the media loaded in the camera at the current settings.

Sensor fps Frames per second generated by the sensor
Project fps Time	base the camera will use for counting timecode and the frame rate used for on-camera playback of internally recorded clips
MON OUT 1 frame rate	Frame rate output over the MON OUT 1 HD-SDI
MON OUT 2/3 frame rate	Frame rate output over the MON OUT 2/3 HD-SDI
Media max. fps current	Maximum frame rate the loaded media can record at the current codec.

LIVE INFO	VERSION	MEDIA INFO
Sensor fps		23.976 fps
Project fps		23.976 fps
MON OUT 1 frame rate		23.976 fps
MON OUT 2/3 frame rate		23.976 fps
Media max. fps current		120 fps
SYSTEM		FPS INFO

Fig. 35: FPS INFO screen

13.1.4.3 USER

Press the USER button to open the USER BUTTONS screen. There are six assignable user buttons. Buttons 1, 2 and 3 are shared with User Buttons 1, 2, and 3 in the operator controls. Press the jogwheel to see a complete list of user button options.

1 MON OUT 1 surround On 2 MON OUT 1 processing Look 3 EVF processing Look USER BUTTONS (press jogwheel to edit) Not avail. Format media False color index None 4 5 6

Fig. 36: USER BUTTONS screen

Assign functions to the buttons by using the jogwheel.

1	2	3
Button 1	MON OUT 1 surround
Button 2	MON OUT 1 processing
Button 3	EVF processing
Button 4	Format media
Button 5	False color index
Button 6	None
4	5	6

Fig. 37: Edit User Button assignment

The following table lists all available functions and if they can be assigned to user buttons 1-3 (identical for on-screen and buttons on camera-left side), 4-6, or both:

None button has no function X X
MON OUT 1 surroundNone button has no function X X	toggles surround view of the MON OUT 1 on or off	X	X
MON OUT 1 processing	toggles processing of MON OUT 1 between Log C, Look, and ALEXA Classic 709	X	X
MON OUT 1 frame lines	toggles frame lines on the MON OUT 1 on or off	X	X
MON OUT 1 status info	toggles status info on the MON OUT 1 on or off	X	X
MON OUT 1 false color	toggles false color display on MON OUT 1 on or off	X	X
MON OUT 1 peaking toggles	peaking on MON OUT 1 on or off	X	X
MON 1 desqueeze toggles	anamorphic desqueeze options on MON OUT 1	X	X
MON OUT 2 surround	toggles surround view of the MON OUT 2 on or off	X	X
MON OUT 2 processing	toggles processing of MON OUT 2 between Log C, Look, and ALEXA Classic 709	X	X
MON OUT 2 frame lines	toggles frame lines on the MON OUT 2 on or off	X	X
MON OUT 2 status info	toggles status info on the MON OUT 2 on or off	X	X
MON OUT 2 false color	toggles false color display on MON OUT 2 on or off	X	X
MON OUT 2 peaking toggles	peaking on MON OUT 2 on or off	X	X
MON 2 desqueeze toggles	anamorphic desqueeze options on MON OUT 2	X	X
MON OUT 3 surround	toggles surround view of the MON OUT 3 on or off	X	X
MON OUT 3 processing	toggles processing of MON OUT 3 between Log C, Look, and ALEXA Classic 709	X	X
MON OUT 3 frame lines	toggles frame lines on the MON OUT 3 on or off	X	X
MON OUT 3 status info	toggles status info on the MON OUT 3 on or off	X	X
None button has no function X X
MON OUT 3 false color	toggles false color display on MON OUT 3 on or off	X	X
MON OUT 3 peaking toggles	peaking on MON OUT 3 on or off	X	X
MON 3 desqueeze toggles	anamorphic desqueeze options on MON OUT 3	X	X
EVF surround^1	toggles surround view on the EVF image on or off	X
EVF processing^1	toggles processing of the EVF between Log C, Look, and ALEXA Classic 709	X
EVF frame lines^1	toggles frame lines on the EVF image on or off	X
EVF status info^1	toggles status info on the EVF image on or off	X
EVF zoom^1	toggles the zoom function on the EVF X
EVF false color^1	toggles false color display on the EVF on or off	X
EVF peaking^1	toggles peaking on the EVF on or off X
EVF desqueeze^1	toggles anamorphic desqueeze options on EVF	X
Frame lines color toggles	the color of frame lines between White, Red, Green, Blue, Yellow and Black	X	X
Return in active toggles	the RET IN signal on or off on the EVF and MON OUT as setScaling of RET IN signal may differ slightly depending on sensor mode and sensor frame rate	X	X
Phase sensor temporarily	shifts the sensor frame rate for 0.2 fps as long as the user button is pressed in order to adjust the phase of the ALEXA frame rate to an external device, i.e. a CRT monitor or a rear screen projector.Only available in standby and with timecode in rec run	X	X
Color bars activates color	bars on MON OUT 1/2/3	X	X

None button has no function X X
Grab still frame takes a still frame and saves it to the SD card	X
Check last clip start plays the first 5 seconds of the last clip, then returns to a live image	X
Check last clip end plays the last 5 seconds of the last clip, then returns to a live image	X
Circle clip marks the clip as a good take Only available during recording	X
Auto WB Press once to open the AUTO WB screen. Press again to perform an automatic white balance.	X
Grab GUI takes a still image of the current main camera control screen on the LCD and saves it to the SD card as a .png file in the ScreenCaptures folder	X
Format media quick link to the Format media screen X
False color index displays the FALSE COLOR INDEX screen		X
Mirror shutter toggles the mirror shutter between View position, Gate position, and running Only on ALEXA SXT Studio		X

1 only available with EVF attached

13.1.4.4 PLAY

-10% CLIPLIST +10% 1 / 106 Wheelpress: Pause CLIP: A001C001_100830_L1JL 0:01:23 ▶ TC 12:24:21:03 0:02:35 Circle clip: Marked 1 frame OPTIONS STEPSIZE

Fig. 38: PLAY screen

Clips that have been recorded internally can be played back by the camera on the EVF and all MON OUTs.

To play clips that have been recorded internally:

1. Press the PLAY button.
2. On the PLAY screen, the last recorded clip loads. Press the jogwheel to play the clip.

3. Press the jogwheel to pause the clip.

4. Rotate the jogwheel to advance the clip frame by frame, or in one second steps. Press the STEPSIZE button to toggle between seconds and frames.

5. Press the +10% and -10% buttons to advance or rewind the clip by ten percent of its duration.

6. Press the HOME button or BACK button to exit and output a live image over the output paths.

NOTICE

Do not eject media during playback.Using frame grab during playback with no SD card or write-protected SD card inserted will exit playback.Recorded clips do not contain the surround view portion of the EVF-1 or MON OUT 1/2/3 image. When playing back clips, the surround view portion will not be visible.Playback of ARRIRAW footage may show a thin black border around the image that is not part of the recorded material.

PLAY screen buttons

STEPSIZE Toggle	the scrub step size between one frame and one second.
+10% Advance the current clip by ten percent of the clip duration.Does not work when close to the end of a clip.
-10% Rewind the current clip by ten percent of the clip duration.Does not work when close to the beginning of a clip.

The jogwheel can be used to scrub through the paused clip. The scrub stepsize is shown in the lower middle section of the screen.

Additional PLAY screen information:

• clip name
• playback progress bar with current playback position in time and total clip duration
• playback timecode
  • information whether the clip was marked as circle clip during recording

OPTIONS

The OPTIONS screen button opens a list of general playback options.

Clip end action Determines what happens when the end of a clip is reached. Options are Pause and Loop.
Show frame lines Sets frame lines to On or Off during playback. Center mark is always switched off during playback.
Status info on MON OUT 1/2/3	Sets status info overlays on MON OUT during playback to On or Off.
Peaking on MON OUT 1/2/3	Determines whether peaking is applied to played back clips on MON OUT. Unless needed to check focus, we recommend to leave this option off as it can confuse others into thinking the peaking indication is a recorded image artifact.
Peaking on EVF Determines	whether peaking is applied to played back clips on EVF. Unless needed to check focus, we recommend to leave this option off as it can confuse others into thinking the peaking indication is a recorded image artifact.

CLIPLIST

Press the CLIPLIST button to open the CLIPLIST screen and access all the clips recorded internally.

To play a clip from the cliplist:

1. Press the CLIPLIST button.
2. Use the jogwheel to select a clip.
3. Press the jogwheel to load the selected clip.
4. Press the jogwheel to play the selected clip.

Additional CLIPLIST screen information:

• number of selected and total number of clips on the media
• codec of selected clip
• duration of selected clip
- circled or not

CLIPLIST

A001C001_100830_L1JL

A001C002_100830_L1JL

A001C003_100830_L1JL

Clip 1 of 106

Dur: 0:02:35

Codec: ProRes 4444 XQ

Marked

Fig. 39: CLIPLIST screen

NOTICE

Not all clip formats can be played back in all camera modes. If a clip cannot be played back in the current camera mode, it appears grayed out. Switch the camera to the mode that was used for shooting to play back those clips.

When a clip with audio tracks is selected for playback, the audio tracks will be played back as well. In-camera playback may render a short audio distortion at the beginning or end of the clip, which is not part of the recorded audio tracks.

Playback and ARRI Look File 2 files

During playback, the camera makes a distinction between clips recorded in ARRIRAW, Log C, or Look processing.

When a clip recorded in ARRIRAW or Log C is played back and an output is configured for Look processing, the look will be applied to this output. Please note that this is the currently enabled ARRI Look File 2, as the camera does not take into account which ARRI Look File 2 was active when the clip was recorded. It is the responsibility of the user to make sure the correct ARRI Look File 2 is applied during playback.

When a clip recorded with Look processing is played back, no ARRI Look File 2 will be applied by the camera during playback. For the duration of that clip, ARRI Look File 2 files will be disabled.

13.1.5 Menu

The menu contains parameters for basic camera setup. It has a tree structure and the current path in the menu is displayed across the top of every screen.

Press the MENU button to open the MENU screen. There are six submenus in the main menu for setting up the ALEXA:

• Recording
  • Monitoring
• Project
• System
  Frame grabs
• User setups

Links to submenus can be identified by an arrow bracket character on the right side. To access a submenu, select the submenu link and press the jogwheel to open the submenu. Press the BACK button to step back one menu.

Menus also contain parameters with a user choice of values. The parameter name is displayed on the left side of the menu, and the current value is displayed on the right side of the menu. To choose a different parameter value, select it with the jogwheel and press the jogwheel to choose a different value. Press the BACK button to cancel a choice. When a parameter is displayed in gray, it cannot be chosen with current camera settings.

Press the HOME button from any menu or submenu to return to the HOME screen.

MENU
Recording	>
Monitoring	>
Project	>
System	>
Frame grabs	>
User setups	>

Fig. 40: MENU screen

13.1.5.1 Recording

Select the RECORDING submenu to adjust parameters for internal recording.

NOTICE

Whenever SxS PRO is mentioned, this applies to SxS PRO+ likewise, unless SxS PRO+ is mentioned explicitly.

MENU>RECORDING

Format	ProRes
Setting	ProRes 4444 XQ
Resolution	2K
Prerecord	Off>
Quick format Capture Drive	>

Format Select for recording options:ProResTMARRIRAWSwitching between recording modes takes approximately 20 seconds.
Setting Select to set the codec:ProRes 422, ProRes 422 HQ, ProRes 4444, ProRes 4444 XQ
Resolution Select to set the resolution.See the tables below for available resolutions.
Prerecord Select to set prerecording options.Note: Only available in ProRes mode.
Quick format Capture Drive/SxS CARDFor Capture Drives only available in AR-RIRAW recording	Select to format a SXR/XR Capture Drive or SxS PRO card. To complete the action, press both FORMAT buttons on the confirmation prompt. A quick format erases only the file allocation table.
Erase Capture Drive/SxS CARD/CFast 2.0 CARDFor Capture Drives only available in ProRes recording	Select to erase a SXR/XR Capture Drive, CFast 2.0 card, or SxS PRO card. To complete the action, press both ERASE buttons on the confirmation prompt. This action takes longer than the quick format, but ensures that all data on the card is erased. Erasing an SxS PRO card can increase its write speed.

NOTICE

• Power loss during formatting of media, especially CFast 2.0 cards, may lead to irreversible damage to the media! Please ensure steady power supply before starting formatting.
• Before formatting or erasing an SxS PRO card, make sure the write-protect tab on the back edge of the SxS PRO card is disengaged. Do not engage or disengage the write-protect tab while the card is loaded in the SxS slot.
• Formatting or erasing media removes all data irreversibly. Follow data management best practices to prevent loss of data.
• In a production with ALEXA XT and SXT cameras, to ensure that all data is removed securely, always format or erase XR Capture Drives with an ALEXA SXT.

If media without a valid file system is loaded in the camera, you will be prompted to format the media. ARRI recommends immediate formatting of media that trigger this warning.

Apple ProRes™ codecs and resolutions

Apple ProRes ^TM codecs supported by the ALEXA:

• ProRes 422
• ProRes 422 HQ
• ProRes 4444 ^1
• ProRes 4444 XQ ^1

1 Without alpha channel (444 only)

ProRes 422 and ProRes 422 HQ have a bit depth of 10, ProRes 4444 and ProRes 4444 XQ have a bit depth of 12.

The following recording resolutions are supported with Apple ProRes ^TM recording:

Sensor Mode Resolution
16:9	HD (1920 x 1080)
	2K (2048 x 1152)
	3.2K (3200 x 1800)
	4K UHD (3840 x 2160)
	2K Anamorphic (2048 x 858)6:5
	4K Cine Anamorphic (4096 x 1716)
4:3 2.8K (2880 x 2160)
	3.4K (3424 x 2202)Open Gate
	4K Cine (4096 x 2636)

ARRIRAW

ARRIRAW recording is possible with SXR Capture Drives and XR Capture Drives. Note that Codex Transfer Drives cannot be used for recording.

The following recording resolutions are supported with ARRIRAW recording:

Sensor Mode Resolution
	2.8K (2880 x 1620)16:9
	3.2K (3168 x 1782)
6:5 2.6K (2578 x 2160)
4:3 2.8K (2880 x 2160)
Open Gate 3.4K (3424 x 2202)

Prerecording

Prerecording is available when the camera is configured for ProRes™ recording. Select PRERECORDING to adjust prerecording parameters.

M>RECORDING>PRERECORD
Prerecord	On
Buffer size	220 MB
Calculated duration	4 sec

Prerecord Select to toggle prerecording mode On or Off
Buffer size Select to set the buffer size. Following buffer sizes are available:220 MB660 MB1100 MB
Calculated duration	Shows the prerecording duration that is derived from buffer size, codec and current fps.

When prerecording is enabled, press the record button once to start prerecording. Active prerecording is indicated by a yellow PRE in the status overlays on EVF and MON OUT (if enabled) and on the HOME screen. As long as prerecording is running, the ALEXA writes images, audio and metadata into a ring buffer of the duration shown under Calculated duration. During this time, the clip duration increments. When the buffer has filled up, the clip duration stops incrementing and the oldest data in the buffer gets overwritten. This process continues as long as prerecording is running. Note that the remaining time will continue to decrease for some seconds after the clip duration has stopped incrementing (i.e. the buffer has filled up). This additional space on the media is reused once recording is started.

Press the record button a second time to start regular recording. All data that has been gathered during prerecording is prepended to the clip.

Press the record button again to bring the ALEXA back into standby.

NOTICE

• The calculated duration depends on buffer size, codec and currently set framerate. Changing either of them will change the prerecording duration.
• If the beeper mode has been set to Start or Start+Stop, the ALEXA beeps only on prerecording start, but not when going from prerecording to recording, otherwise the beep would be recorded when audio is enabled.

13.1.5.2 Monitoring

Select the Monitoring submenu to adjust parameters for monitoring on the EVF-1 and the MON OUT 1/2/3 output. These outputs are meant for monitoring and not recording.

Frame lines set in the Frame lines submenu apply to both MON OUT 1/2/3 and EVF-1. Select the Electronic viewfinder and MON OUT 1/2/3 submenus to switch the set frame lines on or off individually.

MENU>MONITORING

Electronic viewfinder	>
MON OUT 1	>
MON OUT 2	>
MON OUT 3	>
Frame lines	>
RET IN	>

Electronic viewfinder	Select to adjust EVF-1 settings.
MON OUT 1/2/3 Select to adjust MON OUT 1/2/3 settings.
Frame lines Select to set up frame lines.
RET IN path Select to set which of the monitoring output paths carries the signal at the RET IN connector as Return in active is toggled via a USER button.
Electronic hori-zon sensitivity	Select to adjust the sensitivity of the electronic horizon.Note: Available on ALEXA SXT Plus, ALEXA SXT W, and ALEXA SXT Studio only
False color index Select to open the FALSE COLOR INDEX screen which has a reference chart explaining the false color coding.
False color mode Select to set the false color mode to monitoring-based or Log C-based.Monitoring-based: When false color is activated, it is applied to the video signal as it is configured for the respective monitoring output (behavior as of pre-SUP 2.0)Log C-based: When false color is activated, the respective monitoring output is switched to Log C and false color is applied to the Log C signal.

Note: When activating RET IN with status info on, status info will stay active and partially overlay the RET IN image. Left, right, top and bottom edges of the RET IN image are cropped on MON OUT 1/2/3. On EVF, only left and right edges are cropped. Set status info off to view the full RET IN image.

Electronic Viewfinder

MENU>MONITORING>EVF
Brightness	4
Rotate image	Off
Smooth mode	Off
Surround view	On
Frame lines + status info	>
Peaking	Off>

Brightness Select to	adjust the brightness of the EVF.
Rotate image When	mounting the EVF to the right side of the camera, the image can be flipped to orient the image correctly in the viewfinder. Affects only the EVF image, MON OUT 1/2/3 and recording images are not rotated.
Smooth mode Select	to set Smooth mode On or Off. With smooth mode on, the EVF image shutters less when panning. The effect is only noticeable with sensor frame rates of 15 fps or above. Slightly reduces the image brightness in the EVF.Note: Smooth mode is only possible with frame rates up to 30 fps and shutter angles of 180.0 or less. If smooth mode is switched on but not available, the camera issues a warning.Note: Has no effect on ALEXA SXT Studio with optical viewfinder attached.
Surround view Select	to set Surround view on the EVF-1 On or Off. When set to on, the additional pixels outside the recorded image area on the ALEXA's ALEV III sensor are displayed, allowing the operator to see outside the recorded image and keep unwanted objects, such as microphone booms, out of the shot. To view only the recorded image, set Surround view to off.
Frame lines + status info	Select to set frame lines, surround mask, center mark and status info overlays to On or Off in the EVF.
Peaking Select to set	peaking in the EVF to On or Off, and the strength of peaking to low, medium or high.
Anamorphic desqueeze	Select to set Anamorphic desqueeze to 1.3x, 2.0x and 2.0xmag. The desqueeze corrects the image for 1.3x and 2.0x anamorphic lenses. With 2.0x lenses, the user can choose between viewing the full sensor image (2.0x), or only the relevant image area (2.0xmag) where left and right sides of the EVF-1 image outside the 2.39 aspect area are cropped.Not available in 6:5 2K Cine De-squeeze and 6:5 4K Cine De-squeeze

View squeezed image

Select to view the squeezed image as it is captured by the sensor, bypassing the desqueeze performed for recording. Only available in 6:5 2K Cine De-squeezed and 6:5 4K Cine De-squeezed

Zoom position Select to set the Zoom position to Centered or Eye level.

Press the ZOOM button on the EVF-1 to magnify:

• Centered – the center of the image is magnified for focus check
• Eye level – the image is magnified for focus check along a line approximately one third from the top, where an actor's eyes are commonly located in image composition.

Frame lines + status info screen

Frame lines Select to set frame lines to On or Off. Frame lines are a reference for framing that typically consist of an image frame, a center mark and an aspect ratio reference. See the appendix for more information on the ALEXA frame line format.

Surround mask Select to adjust the Surround mask settings. If surround view is set to "On", it must be separated from the recorded image area to allow proper framing. Users can choose:

• Black line
  • Color line
• Mask 25%
• Mask 50%
• Mask 100%

Center mark Select to set the Center mark to Off, Small Dot, Medium Dot or Cross to aid in image framing.

Status info brightness

Select to adjust the brightness of the status info overlays.

Status info Select to set Status info to On or Off. When set to On, camera shooting parameters are displayed across the top of the EVF-1's image, outside the active image area and camera status information is displayed across the bottom of the EVF-1's image, outside the active image area.

Electronic hori- zon

Select to set the electronic horizon level to On or Off.

Only available on ALEXA SXT Plus, ALEXA SXT W, and ALEXA SXT Studio.

Brightness is controlled via frame line intensity.

LDS info Overlay showing LDS lens info.

MON OUT 1/2/3

MENU>MONITORING>MON OUT 1
Frame rate	24 fps
Scan format	p
Surround view	Off
Frame lines + status info	>
Peaking	Off>
False color	Off

MON OUT 1, 2 and 3 are 422 1.5G single link HD-SDI outputs. The output range is fixed at legal range. MON OUT 1, 2 and 3 offer the same set of parameters, hence only MON OUT 1 is described in detail.

Frame rate Select to	set the MON OUT frame rate to 23.976, 24, 25, 29.97 or 30 fps. The frame rate should, if possible, match the sensor frame rate to avoid dropped frames or duplicate frames on the output, which would result in jittery images during camera movement or when image subjects are moving.MON OUT 3 frame rate cannot be set individually, but inherits MON OUT 2 frame rate.
Scan format Select to	set the type of scan. Which type you use depends on the downstream equipment the MON OUT is connected to. Some monitors, video transmitters or switchers are happier with the p, others with the psf setting.p: Progressive. Images are transmitted line by line from left to right, starting at the top-left pixel.psf: Progressive segmented frame. Images are first split into fields, which are then transmitted line by line from left to right.
Surround view Select	to set Surround view on the MON OUT On or Off.When set to on, the additional pixels outside the recorded image area on the ALEXA's ALEV III sensor are displayed, allowing the operator to see outside the recorded image and keep unwanted objects, such as microphone booms, out of the shot. To view only the recorded image, set Surround view to off.
Frame lines + status info	Select to set frame lines, surround mask, center mark and status info overlays to On or Off on the MON OUT.
Peaking Select to set	peaking on the MON OUT to On or Off, and the strength of peaking to low, medium or high.
False color Select to	activate the false color display on the MON OUT.The false color display is an exposure tool that overlays the image with color coding to highlight areas with significant luminance values.
Anamorphic desqueeze	Select to set Anamorphic desqueeze to 1.3x, 2.0x and 2.0xmag. Desqueeze corrects the image for 1.3x and 2.0x anamorphic lenses. With 2.0x lenses, the user can choose between viewing the full sensor image (2.0x), or only the relevant image area (2.0xmag) where left and right sides of the MON OUT image outside the 2.39 aspect area are cropped.Not available in 6:5 2K Cine De-squeezed and 6:5 4K Cine De-squeezed
View squeezed image	Select to view the squeezed image as it is captured by the sensor, bypassing the desqueeze performed for recording.Only available in 6:5 2K Cine De-squeezed and 6:5 4K Cine De-squeezed

NOTICE

Only use double shielded HD-SDI cables for monitoring to ensure error free data transmission!

Frame lines + status info screen

Frame lines Select to	set frame lines to On or Off. Frame lines are a reference for framing that typically consist of an image frame, a center mark and an aspect ratio reference. See the appendix for more information on the ALEXA frame line format.
Surround mask Select	to adjust the Surround mask settings. If surround view is set to "On", it must be separated from the recorded image area to allow proper framing. Users can choose:Black lineColor lineMask 25%Mask 50%Mask 100%
Center mark Select to	set the Center mark to Off, Small Dot, Medium Dot or Cross to aid in image framing.
Status info brightness	Select to adjust the brightness of the status info overlays.
Status info Select to	set Status info to On or Off. When set to On, camera shooting parameters are displayed across the top of the MON OUT image, outside the active image area and camera status information is displayed across the bottom of the MON OUT image, outside the active image area.
Electronic horizon	Select to set the electronic horizon level to On or Off.Only available on ALEXA SXT Plus, ALEXA SXT W, and ALEXA SXT Studio.Brightness is controlled via frame line intensity.
LDS info Select to set	the LDS lens information overlay to On or Off.
Camera index letter	Select to display the camera index letter in the top right corner of the MON OUT image.

Frame Lines

M>MONITORING>FRAME LINES
Frame line 1	ARRI 1.85>
Frame line 2	>
User rectangles	Off>
Color	Red
Intensity	2

Frame lines are an image overlay that can be applied to either the EVF image, the MON OUT image, or both.

ALEXA frame lines are stored as XML files that define the frame lines' aspect ratio, marker style, line width, center marker and more. The color of the frame lines is set on the camera or can be defined within the file.

A standard set of frame lines for different aspect ratios is provided in the camera, including:

• 1.33:1 (ARRI 1.33)
• 1.66:1 (ARRI 1.66)
• 1.78:1 (ARRI 1.78)
• 1.85:1 (ARRI 1.85)
• 2.39:1 (ARRI 2.39 Flat)
• 2.39:1 1.3x anamorphic (ARRI 2.39 Scope 1.3x)
• 2.39:1 2.0x anamorphic (ARRI 2.39 Scope 2x)

To create custom frame lines, use the Frame Line Composer on the ARRI website.

Save the new frame lines as XML files to an SD card formatted on the ALEXA, in the Frame lines folder. The ALEXA supports up to 16 frame line templates.

To load additional frame lines:

1. In the FRAME LINES menu, select Frame line 1 (or Frame line 2).
2. Press the ADD button.
3. On the FRAME LINES (SD CARD) screen, use the jogwheel to select the frame line you wish to add.
4. Press the jogwheel to add it to the FRAME LINES list.
5. Using the jogwheel, select the new frame line in the FRAME LINES list.
6. Press the jogwheel to set the new frame line.

Frame line 1 Select to set the primary frame line template.
Frame line 2 Select to set a secondary frame line, if desired.
User rectangles	Select to open the User rectangles menu, where two custom user rectangle overlays can be adjusted.

Color Select to set the color of the frame lines. In the frame lines definition file, lines can either be given a fixed color, or they can have the color specified as "User". If "User" is chosen for a line, the setting chosen in this menu section is applied to the line.

Intensity Select to set the intensity of the frame lines. The higher the number, the brighter the frame lines appear.

User rectangles screen

User rectangles	Select to set user rectangles to Off, Rect 1, Rect 2 or Rect 1&2. The ALEXA can display up to two additional rectangles that can be adjusted manually.
Set rect 1 Select	to set the shape of rectangle 1. Activate it through User rectangles.
Set rect 2 Select	to set the shape of rectangle 2. Activate it through User rectangles.

The currently active border is highlighted in red on all outputs that have frame lines enabled while editing user rectangles. Note that it may take some moments for the highlighting to update when switching between borders.

NOTICE

Default frame lines have "User" specified as color for all content.

Frame Lines Saved in Metadata

The ALEXA records up to six rectangular frame lines from the active frame line files into metadata. This metadata is present in all recording formats and on all HD-SDI outputs. The frame line metadata can be used either for automatic dailies creation or for displaying the frame lines in post.

Automated Dailies Creation

It is possible to load two frame line files simultaneously into the camera for a total of six frame lines displayed in the viewfinder or on MON OUT. In metadata, the frame lines of the first file will be called frame line 1A, frame line 1B and frame line 1C, while the frame lines of the second file will be called frame line 2A, frame line 2B and frame line 2C. Frame line 1A is automatically the master frame line. The master frame line can be used by dailies creation software to automatically frame the dailies. This feature is expected first on the Codex Vault, but other dailies creation software is expected to follow suite.

Frame Lines in Post

The frame line metadata makes the original camera frame lines available during post production for editing, color grading or compositing tools and can be displayed as an overlay in the respective image viewer.

False Color Index

Select False color index to display a reference chart showing the relationship between the color overlays, signal level in percent and descriptions. False color is available on the EVF-1 and over the MON OUT outputs.

What	Signal Level	Color
White clipping	100% - 99%	red
Just below white clipping	99% - 97%	Yellow
One stop over medium gray (Caucasian skin)	56% - 52%	pink
18% medium gray	42% - 38%	green
Just above black clipping	4.0% - 2.5%	blue
Black clipping	2.5% - 0.0%	purple

Fig. 41: False Color Encoding

13.1.5.3 Project

MENU>PROJECT
Sensor mode	16:9
Resolution	4K Cine>
Setting	ProRes 4444 XQ>
Project frame rate	23.976 fps
Camera index	A
Camera index color	Red

Sensor mode	Select to set which sensor mode is active: 16:9, 4:3, 6:5, or Open Gate.Note: Changing the sensor mode includes a factory reset.
Resolution Select	to set the current recording resolution. Links to MENU>Recording.
Setting Select to	set the current recording codec. Links to MENU>Recording.
Project frame rate	Select to set the time code timebase and the playback frame rate. The time code timebase determines how many frames the time code counts per second. The playback frame rate determines the frame rate that clips will be played back at.
Camera index	Select to set the camera identifier. Identifies the individual camera unit in clips and is reflected in clip names recorded internally. This is usually "A" for A-camera unit, "B" for B-camera unit, and so on.
Camera index color	Select to set the color of the camera index letter to match the color coding of your cameras. This color is used when the camera index letter is switched on for MON OUT.
Next reel count	Select to set the reel number assigned to the next new media used for internal recording. The ALEXA automatically advances the reel number every time new media is formatted on the camera. The reel number is reflected in clip names on media.
Lens squeeze factor	Select to set the squeeze factor of the lens that is in use. This value is written into the metadata of the clip and allows video players and editing software to automatically unsqueeze clips that have been shot with anamorphic lenses.Note: Fixed to 1.0 for recording resolutions that record de-squeezed images to prevent double de-squeezing.
Production info	Select to open the PRODUCTION INFO screen where the user can enter metadata information specific to the production.

NOTICE

• ARRI recommends to set the value of Next reel count to 001 at the beginning of a shoot.
• When the current reel count is 999, the reel count reverts to 001 for the next media that is formatted.
• When changing the camera index on a card that already contains clips, the clip counter is not reset to 1 but is incremented from the last clip of the last recording.

Production Info

The PRODUCTION INFO screen has fields to enter metadata information specific to the production. The user can enter the names of the director, cinematographer, location, production, scene and take. Two additional fields allow to enter other data.

Production Enter the name of the production
Prod. Company Enter the name of the production company
Director Enter the name of the director
Cinematographer Enter the name of the cinematographer
Camera Operator Enter the name of the camera operator
Location Enter the name of the location
Scene Enter the name/number of the scene
Take Enter the name/number of the take
User Info 1 Enter other info
User Info 2 Enter other info

M>PROJECT>PRODUCTION INFO
Production	ABCD>
Prod. Company	EFGH>
Director	Jane Doe>
Cinematographer	John Doe>
Camera Operator	Jim Doe>
Location	The Shack>

Aa	ERASE	CLEAR ALL
SET DIRECTOR
JANE DOE
A	B	C
D	E	F
G	H	I
J	K	L
M	N	O
P
Q	R	S
T	U	V
W	X	Y
Z
1	2	3
4	5	6
7	8	9
0	-	_
[ ].

13.1.5.4 System

The System menu contains submenus of system settings.

MENU>SYSTEM
Imaging	>
Power	>
External sync	>
Test signal	>
Display + beeper	>
System time + date	>

Imaging

MENU>SYSTEM>IMAGING
Sensor mode	16:9
Sensor temperature	Standard
Noise reduction	Off
Image transform	None
User Pixel Masking	>

Sensor mode Select	to set which sensor mode is active: 16:9, 4:3, 6:5, or Open Gate.Note: Changing the sensor mode includes a factory reset.
Sensor temperature	Select to set the sensor temperature to Standard (default) humidity or High humidity. When shooting in tropical conditions with high temperature and high humidity, the sensor temperature can be changed from Standard to High humidity to prevent condensation from forming on the sensor cover-glass.
Noise reduction Select	to set noise reduction On or Off.Note:When recording ARRIRAW, noise reduction is only applied to the previewing paths and not to the recorded images. Information about noise reduction is stored in metadata.Note: Using noise reduction may result in slight image artifacts when capturing fast moving objects. As always, use tests to verify applicability.
Image transform Select	to set the desired image transformation. Available values are:NoneMirror horiz.Rotate 180^ Note: Horizontal mirroring is applied on all output paths and internally recorded material. Image rotation is only applied to output paths; internally recorded material is not rotated, but rotation information is written into metadata. Frame grabs of rotated images will be displayed upside down on a computer.
User Pixel Mask-ing	Select to open the User Pixel Masking screen.

User Pixel Masking

MENU>SYSTEM>IMAGING>UPM

User Pixel Mask active Off

User Pixel Mask installed Off

Install User Pixel Mask >

Backup User Pixel Mask

Uninstall User Pixel Mask >

All sensors exhibit a certain number of defect pixels, and ALEXAs have two mechanisms to catch and correct them: one is a static pixel correction based on a pixel mask created during manufacturing, and the other is a dynamic pixel correction that continuously evaluates each frame and masks defect pixels that are not caught by the static pixel mask. In very few cases we have observed some pixels that are not corrected by either method; for those cases we have developed User Pixel Masking.

User Pixel Masking works in combination with the ARRIRAW Converter (ARC) from ARC version 3.0 on.

To use User Pixel Masking for all Output and Recording Formats:

1. Record a short ARRIRAW sequence at 24 fps OR capture an ARRIRAW frame grab.

2. Import the ARRIRAW sequence or frame grab into the ARC.

3. Use the ARC software to mark defect pixels. The marked pixel coordinates are stored in an XML file called the User Pixel Mask. Please note that it is advisable to mark the least number of pixels necessary, as too many marked pixels can be counter productive.

4. Save the User Pixel Mask into the folder /ARRI/ALEXA/Sensor/ on the SD card and load it into the camera via the SD card.

5. After a restart of the camera, the marked pixels will be masked using information from surrounding pixels. This masking happens right after the sensor, and thus applies to all outputs: the electronic viewfinder, MON OUT, and frame grab outputs as well as ARRIRAW and ProRes recordings.

6. Carefully check the end result by visually inspecting the areas where you have marked pixels; if too many pixels are marked too close to each other, or if pixels are marked close to other pixels that are already marked in the static pixel mask, the result could be uncorrectable clusters, which are more visible than the original defect pixels.

As an added service, it is possible to send the User Pixel Mask to ARRI Service at [e-mail] for verification. We strongly recommend to take advantage of this free service, as sometimes, depending on the background, clusters are difficult to spot. Please note, however, that in the end it is the responsibility of the person creating the User Pixel Mask to verify that no clusters are formed.

NOTICE

• When shooting ARRIRAW, it is not necessary to load the User Pixel Mask into the camera. Instead, it can be applied to the ARRIRAW files in post using the ARRIRAW converter software or any third party software that has implemented the User Pixel Mask feature through the ARRIRAW SDK.
• The User Pixel Mask will remain intact during a factory reset and during a software update. It can be manually removed or overwritten with a new one at any time.

User Pixel Mask active Shows whether a User Pixel Mask is currently active in the camera.

User Pixel Mask installed Shows whether a User Pixel Mask is currently installed in the camera.

Install User Pixel Mask Select to install a User Pixel Mask from the SD card.

Backup User Pixel Mask Select to backup the currently installed User Pixel Mask onto SD card. It will be automatically named UserPixelMask_CAMSERIAL_Back-up_YEARMONTHDAY_HOURMINUTESECOND

Uninstall User Pixel Mask Select to uninstall a User Pixel Mask.

Power

MENU>SYSTEM>POWER

BAT1 (Plug) warning 16.0V

BAT2 (Onboard) warning 11.0V

BAT1 (Plug) warning Select to adjust the voltage level at which a power warning is displayed for the power source connected to the BAT plug. The level can be adjusted to match the battery type used. The default value is 21.0V.

BAT2 (Onboard) warning Select to adjust the voltage level at which a power warning is displayed for the onboard battery. The level can be adjusted to match the battery type used. The default value is 12.0V.

NOTICE

When the voltage level reaches a point 10% below the warning level set in the POWER menu, the ALEXA displays a battery error message and recording is unavailable. The camera will read the voltage level as insufficient.

Smart batteries that transmit their remaining load to the camera emit a warning at 10% remaining capacity and an error at 5% remaining capacity. Currently, batteries made by ID-X, Bebop, Anton Bauer and any battery using the TI-protocol support this feature.

External Sync

MENU>SYSTEM>EXT SYNC

Eye index L

Sensor sync Off

HD out phase 0 clocks

Send HD sync trigger >

Settings sync ETH master

Eye index Select to set the Eye index to left (L) or right (R). The first letter of the Camera ID will be changed to L or R for stereoscopic productions to identify left and right eye cameras. The eye index is reflected in clip names recorded internally.

Sensor sync Select to sync the sensors of two ALEXAs. See page 135 for more information.Off: The camera is in non-synced mode for regular use.EXT master: The camera sends signals to an EXT SLAVE camera via the EXT connector containing sync clock and TC signals.EXT slave: The camera receives signals from an EXT MASTER camera containing sync clock and TC signals through the EXT connector.

HD out phase Select to adjust the phase of all MON OUTs in the range of -30 to +30 HD clocks (1 HD clock = 13.4 ns). This can be necessary for 3D applications with external recorders that require the slave signal to arrive after the master signal. Shift the phase backwards (+) on a slave camera or forwards (-) on a master camera to achieve the correct signal order.

Send HD sync trigger When using two cameras in sensor sync mode without settings sync, the EXT MASTER camera must send a trigger to the EXT SLAVE camera to ensure the HD outputs of the cameras are synced. Press the jogwheel to send the trigger.

Settings sync ALEXA cameras can be operated in synced-settings mode, where the settings of two cameras can be synced via Ethernet. See page 137 for more information.

Unless a phase offset is required by certain monitoring equipment, generally there will be no need to adjust the HD out phase. Use "Send HD sync trigger" to bring the HD output of connected cameras back into sync.

Test Signal

MENU>SYSTEM>TEST SIGNAL
Color bars	Off
Test tone	Off
Test tone level	0 dBFS

Color bars Select to activate SMPTE color	barson all MON OUTs. The color bars are a 10-bit signal according to SMPTE RP 219-2002.Note: Color bar is switched off when recording is started.
Test tone Select to activate a 1 kHz audio test	test tone on all channels when color bar is active.Note: Test tone is only active when audio recording is on and possible.
Test tone level Select to set the level of the audio test	tone to 0 dbFS, -9 dBFS or -18 dBFS.

Note: Switching on the color bars the first time after camera bootup may take a few seconds.

Display + Beeper

M>SYSTEM>DISPLAY+BEEPER

Display brightness 3

Button brightness Off

Run beeper mode Start+Stop

Display brightness Select	to adjust the brightness of the LCD display on the camera-right side. To adjust the display brightness when the HOME screen is displayed, press and hold the BACK button while rotating the jogwheel.
Button brightness Select	to adjust the brightness of the button illumination.
Run beeper mode Select	to set the Run beeper mode to:OffStartStopStart+Stop

System Time + Date

MENU>SYSTEM>TIME + DATE

Time 13:02:07

Date 2010-07-20

Set time + date >

Time zone UTC -12:00

DST Standard time

Time Displays the current time (read-only).

Date Displays the current date (read-only).

Set time + date Select to set time and date.

Time zone Select to set the time zone to match your current location.

DST Select to set daylight savings time.

Set time + date

MENU>SYSTEM>SET TIME + DATE

2010-07-20

13:02:07

<

DONE

Use the lower screen buttons to navigate between the elements in the screen and to finish your setting.

To set the time and date:

1. In the System menu, select System time + date.
2. Select Set time + date.
3. Use the jogwheel to adjust the date value, starting with the year.
4. Press the > button to jump to the month, day, hour, minute and second.

Press the < button to jump back one step.

1. Press the DONE button when finished.

Fan mode

Fan mode Select to set the fan mode to Regular for locations with ambient temperatures up to 30°C (86°F). For locations with ambient temperatures higher than 30°C (86°F), set to Rec low.When the fan is set to Rec Low, it will run at a high rate when the camera is in Standby, and run at a low rate when the camera is recording.

Network

MENU>SYSTEM>NETWORK
Web remote read-only	Off
Camera Access Protocol	On
CAP client name
CAP password	>

The ALEXA provides two ways for accessing the camera via network: with a web browser using the web remote, or with a third party software supporting the Camera Access Protocol (CAP).

The Camera Access Protocol allows third party software to remotely manipulate the currently active ARRI Look File 2 file. Changes to an ARRI Look File 2 file become immediately effective on all image paths with processing configured to Look file. Third party software can connect to the camera via Ethernet. A list of supported third party software can be found on the ARRI ALEXA SXT web page.

Web remote read-only	Select to restrict network access to read-only mode. When set to Off, the Web Remote will not function properly.
Camera Access Protocol	Select to switch remote access to the camera via the Camera Access Protocol on or off.
CAP client name Shows	the name of the currently connected client. Shows 'NONE' if no client is connected, and 'NO NAME' if the connected client has not transmitted its name.
CAP password Select to	set the password for Camera Access Protocol connections.

SD card

Format + prepare SD card	Select to format the SD card and create the required folder structure after confirmation.Note: This erases all data present on the SD card.
Prepare SD card Select to create or complete the required folder struc-ture on the SD card without erasing any data present on the SD card.

Firmware - Software Update Packets (SUPs)

MENU>SYSTEM>FIRMWARE

Select update file

(Now:

SXT_1.0:35937)

Licensed features

To keep the ALEXA up to date with new features, the camera firmware can be updated by the user. Download the latest Software Update Packet (SUP) from http://www.arri.com/camera/digital_cameras and be sure to read the included instructions.

NOTICE

ARRI discourages downgrading cameras to lower SUP versions. Be sure to carefully read the release notes of the currently installed SUP to find out if downgrading is possible, and ask your ARRI service center if in doubt.

To update the camera to a new SUP:

1. Copy the new SUP into the Firmware folder on an SD card formatted in the ALEXA.
2. Load the SD card into the camera.
3. In the System menu, select Firmware.
4. Select Select update file.
5. Select the new SUP from the list on the FIRMWARE (SD CARD) screen.
6. Press both UPDATE buttons simultaneously to update the camera's firmware.

NOTICE

Update duration may differ between camera models. Do not interrupt the update once it has started. Make sure the camera power supply will remain sufficient for the duration of the update (approx. 15 minutes).

Select update file Select to update the camera's firmware. If an SD card containing update files is loaded in the camera, you can select an update file from the list and perform an up-date.

Current version Select to display the release code of current installed firmware.

Licensed features Select to manage licensed features on the INSTALLED LICENSES screen.

NOTICE

- On rare occasions, the update process can fail. If the update procedure fails, try it again until you succeed.

Licensed Features

INSTALLED LICENSES

ALEXA SXT Bundle

HW INFO

The Licensed Features screen shows all installed licenses, and allows to export a HW INFO file. This file contains information about the hardware configuration of the ALEXA and might be requested by ARRI Service for troubleshooting.

13.1.5.5 Frame Grabs

MENU>FRAME GRABS

File format

Jpeg

Frame grab path

EVF

Compare grab 2 live image

It is possible to take still frames from the camera's sensor. The image path from which still frames are grabbed can be selected. Available still image formats include .jpg, .tif and .dpx when the frame grab path is not RAW, or .ari when the frame grab path is RAW. Note that .tif, .dpx, and .ari still frames have large file sizes and take some time to be copied to the SD card. Use fast SD cards when taking still frames in these formats.

To set the still frame format:

1. In the Frame grabs menu, select File format.
2. Use the jogwheel to select the desired format and press the jogwheel to set it. Unavailable formats are grayed out.

To take a still frame and save it to the SD card:

▶ Press the GRAB button. The write process is indicated by a flashing camera icon, followed by a flashing SD card icon on the HOME screen. When writing is finished, a new still frame can be taken. The time needed for saving the image to the SD card will vary, depending on the file format. Additional still frames may not be taken while saving.

To take a still frame during playback of ProRes, ensure that the frame grab path is not set to RAW.

Still frames can also be taken by assigning User buttons 1, 2 or 3 to Grab still frame. This allows still frames to be taken from the operator's side of the camera (camera-left side).

Still frames will be saved in the Grabs folder on the SD card.

Frame compare

It is possible to load a previously made frame grab and compare it with the current live image. Select Compare grab 2 live image to go to the COMPARE FILE screen.

Press LOAD GRAB to select a frame grab from the SD card for comparison.

Press OPTIONS to access the options for frame compare. The following options are available:

Compare mode Interleave	Toggle
Active on EVF On/Off
Active on MON OUT 1 On/Off
Active on MON OUT 2 On/Off
Active on MON OUT 3 On/Off

Press COMPARE on the COMPARE FILE screen to activate or deactivate frame compare.

When compare mode is set to Interleave, every other line is replaced by content from the loaded file. This is useful for lining up shots, as the frame will flicker until the stored and the live image are perfectly lined up. Otherwise, pressing COMPARE completely overlays the loaded image over the live image.

13.1.5.6 User Setups

MENU>SETUPS
Save current setup	>
Load setup	>
Factory reset	>

A user setup is a profile of the current settings on the ALEXA that can be saved to the SD card. User setups can be given custom names, saved to the SD card and loaded onto multiple ALEXAs.

Rather than resetting the camera to its factory default settings, a user setup can be used to reset the camera to a user's default settings.

A user setup contains all parameters set in the camera except files that have been transferred via SD card, specifically frame lines and ARRI Look File 2 files. These are not affected by loading a user setup and are only cleared by performing a factory reset.

Requirements:

- formatted SD card loaded in the SD card slot on the ALEXA

To create a user setup:

▶ Set all the desired parameters on the ALEXA.

To save a user setup:

1. Press the MENU button.
2. Use the jogwheel to select User Setups.
3. Select Save current setup.
4. To apply a custom name to your user setup, press the RENAME button. Erase the default user-setup name by pressing the CLEAR ALL button.
5. Use the jogwheel to enter a new name by scrolling to the desired character and pressing to select it.

Aa ERASE CLEAR ALL SET NAME Setup_123421 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9 0- _ [ ] . << DONE

1. When you have finished entering the new user setup name, press the DONE button.
2. Press the jogwheel to save the new user setup to the SD card.

To load a user setup:

1. Press the MENU button.
2. Use the jogwheel to select User Setups.
3. Select Load setup.

SETUPS (SD CARD)

DefaultSetup1 Highspeed_ARRI

1. Use the jogwheel to select the desired setup in the list and press the jogwheel to load the setup.
2. Press the PROJECT button to validate your project settings.

NOTICE

User setups work only in the SUP version they are created in. After a SUP update, a new user setup must be created and saved.

A recommended procedure for working with user setups is as follows:

1. Before shooting, perform a factory reset to restore factory default settings.
2. Save a user setup named "Reset" or similar. This will be used instead of performing the ALEXA's factory reset.
3. Adjust the camera's shooting parameters and settings, and load the desired frame lines and ARRI Look File 2 files.
4. Save another user setup with a descriptive name, such as "Show Title A-Cam".
5. To reset the camera to the default settings without losing the frame lines or ARRI Look File 2 files, load the "Reset" user setup.

User setups can be used to ensure that cameras on multi-camera shoots have matching settings, or to transfer a show's setup onto daily cameras, to ensure they carry the same shooting specifications.

NOTICE

You cannot switch between sensor modes by loading a user setup. To switch sensor modes, go to the SYSTEM>IMAGING menu or PROJECT menu.

13.2 Operator controls

The operator controls are located on the camera left side and consist of three function buttons plus three assignable buttons.

1 User button 1.	Can be assigned functions with the USER button on the Main controls
2 User button 2.	Can be assigned functions with the USER button on the Main controls.
3 User button 3.	Can be assigned functions with the USER button on the Main controls.
REC Press the REC button to start and stop internal recording. A red LED tally indicates recording. See section Prerecording for different behavior with prerecording switched on.
PLAY Press the PLAY button once to load the last clip.Press the PLAY button again to toggle between play and pause.Press and hold the PLAY button for 2 seconds to stop playback.
LOCK Press and	hold the LOCK button for 3 seconds (counted down on the main controls LCD) to lock the main and operator controls. A blue LED beside the LOCK button on the camera-left side indicates the lock is active. A lock icon on the LCD display on the camera-right side indicates the lock is active.Press and hold the LOCK button for 3 seconds to unlock the main and operator controls.

REC PLAY LOCK

Fig. 42: Operator UI

13.3 EVF-1 Controls

The EVF-1 controls are located on the electronic viewfinder. They consist of a number of function buttons and a jogwheel.

CAM Press the CAM button to open the EVF-1's CAM menu.
EVF Press the E	VF button to open the EVF-1's EVF menu.
ZOOM Press the	ZOOM button to magnify the EVF-1 image 2.25x for focus check. The magnification ratio is 1:1, or one sensor pixel to one EVF-1 display pixel. Active magnification is indicated by an orange frame around the image. Frame lines are deactivated while zoom is active.
EXP Press the E	EXP button (EXP = EXPOSURE) to toggle false color display on and off.

Two black camera modules with lens and adjustment knobs, shown from front and side views (no visible text or symbols)

When the LOCK button on the main controls is engaged, the CAM and EVF buttons are locked with the main controls and operator controls. The ZOOM and EXP buttons are not affected by the lock.

The message "Button is locked!" is displayed in the EVF-1 when the CAM or EVF button is pressed while the main controls are locked.

13.3.1 Viewfinder EVF menu

Press the EVF button to open the Viewfinder EVF menu in the EVF-1 display and set the viewfinder parameters. Use the jogwheel on the EVF-1 to select and set menu options. Press the EVF button to exit the Viewfinder EVF menu.

Brightness Select to set the brightness of the EVF from 1 (least bright) to 5 (brightest). A brightness level of 4 is recommended for normal shooting scenarios.
Rotate image When mounting the EVF to the right side of the camera, the image can be flipped to orient the image correctly in the viewfinder. Affects only the EVF image, MON OUT and recording images are not rotated.
Smooth mode Select to set Smooth mode On or Off. With smooth mode on, the EVF image shutters less when panning.Note: Smooth mode is only possible with frame rates up to 30 fps and shutter angles of 180.0 or less. If smooth mode is switched on but not available, the camera issues a warning.Note: Has no effect on ALEXA Studio with optical viewfinder attached.
Surround view Select to set Surround view on the EVF-1 On or Off.When set to on, the additional pixels outside the recorded image area on the ALEXA's ALEV III sensor are displayed, allowing the operator to see outside the recorded image and keep unwanted objects, such as microphone booms, out of the shot. To view only the recorded image, set Surround view to off.
Surround mask Select to adjust the Surround mask settings. If surround view is set to On, the boundary between the recorded area and surround view will always be indicated to allow proper framing. Users can choose between:Black lineColor lineMask 25%Mask 50%Mask 100%
Status info Select to set Status info to On or Off. When set to On, camera shooting parameters are displayed across the top of the EVF-1's image, outside the active image area and camera status information is displayed across the bottom of the EVF-1's image, outside the active image area.
Frame lines Select to set frame lines to On or Off. Frame lines are a reference for framing that typically consist of an image frame, a center mark and an aspect ratio reference. See the appendix for more information on the ALEXA frame line format.
Select framelines 1 Select to set the main frame lines template from those stored in the camera.
Select framelines 2 Select to set the secondary frame lines template from those stored in the camera.
Center mark Select to set	the Center mark to Off, Small Dot, Medium Dot or Cross to aid in image framing.
User rectangles Select to	display up to two additional user-editable rec-tangles in the EVF-1 image.
Edit user rectangles Select to adjust the user rectangles.
Framelines color Select to set the color of the frame lines.
Framelines intensity Select to set the brightness of the frame lines.

13.3.2 Viewfinder CAM menu

Press the CAM button to open the Viewfinder CAM menu in the EVF-1 display and set camera parameters. Use the jogwheel on the EVF-1 to select and set menu options. Press the CAM button to exit the Viewfinder CAM menu.

FPS Select to set	the sensor frame rate. Preconfigured and previously added user-defined values can be selected in the FPS list.
SHUTTER Select	to set the shutter angle. Preconfigured and previously added user-defined values can be selected in the Shutter list.
EI Select to set	the exposure index. Settings from EI 160 to EI 3200 can be selected, in steps of 1/3 stop.
WB Select to set	the white balance. Preconfigured and previously added user-defined values can be selected in the WB list.

13.4 Web Remote

All ALEXA cameras contain a web server that can provide a user interface for remotely controlling the ALEXA.

Connecting to the Camera

The Web Remote can be accessed through an Ethernet connection from the camera's ETH port to a computer's Ethernet port, using the Bonjour protocol or by directly entering the camera's IP address. First, make sure on the camera that MENU>SYSTEM>NETWORK>Web remote ready-only is set to Off. If you want to prevent access to the Web Remote, set MENU>SYSTEM>NETWORK>Web remote ready-only to On. Then connect the cable. To use the Bonjour protocol, open the web browser on the computer and enter the address alexa####.local in the browser's address bar, with #### being the serial number of the camera. Alternatively, you can look up the camera's IP address (INFO > SYSTEM) and enter that in the browser's address bar.

14 Operation of the Camera

This chapter covers tasks the user will encounter while using the ALEXA. While previous chapters contained specific procedures for basic use, this chapter will outline broader tasks and offer recommendations and best practices, including camera configuration.

14.1 Internal recording

This chapter contains information and recommendations for internal recording. The user is encouraged to adapt the recommendations and workflow to individual and production needs.

NOTICE

• ARRI cannot be held responsible for the loss of any data in conjunction with internal recording.
• While we do everything we can to assure reliable functioning of different recording medias such as SXR Capture Drives, and while the mean time before failure (mtbf) for drives is excellent, a failure that results in loss of data may occur at any time. Therefore, you are obliged to implement and maintain at any time adequate and necessary data security measures and back up drive content as soon as possible. ARRI assumes or accepts no liability or responsibility for data loss or data corruption, or any other damages, loss or harm due to malfunction of recording drives.

14.1.1 Recording Module

ALEXA SXT cameras can use SXR Capture Drives, XR Capture Drives, Sony SxS PRO cards, Sony SxS PRO+ cards, or CFast 2.0 cards for internal recording. All media require an adapter specific to their type: SXR Capture Drives require the SXR Adapter, XR Capture Drives require the XR Adapter, SxS PRO and SxS PRO+ cards require the SxS Adapter 2, CFast 2.0 cards require the CFast 2.0 Adapter 2. SxS Pro cards, SxS Pro+ cards and CFast 2.0 cards do not allow recording ARRIRAW data.

File System

Depending on the recording format, SXR/XR Capture Drives are initialized with different file systems. SXR/XR Capture Drives can be formatted in-camera or using Codex Software (Mac only) in a Codex Single Dock, Dual Dock (XR Capture Drives only), or the standalone Codex Vault.

When the camera is set to ARRIRAW recording, SXR/XR Capture Drives are initialized as Codex volume. When the camera is set to ProRes recording, SXR/XR Capture Drives are initialized with the UDF file system. In both cases, the file system is read-only for computers.

SxS PRO cards, SxS PRO Plus cards and CFast 2.0 cards can only be used for ProRes recording. These cards are always initialized with the UDF file system and have to be formatted in the SXR Module with the SxS Adapter 2 or the CFast 2.0 Adapter 2, respectively.

14.1.2 Internal Recording Formats

ALEXA footage can be captured as QuickTime movies using an Apple ProRes™ codec or as unencrypted and uncompressed ARRIRAW file sequences.

NOTICE

Recording ARRIRAW internally works only with SXR/XR Capture Drives.

ProRes

Recording in ProRes 2K is a cost-efficient alternative to shooting ARRIRAW, as it requires less storage space and no processing, but at the same time delivers an image quality that is superior to that of up-scaled HD material.

With the option to capture ProRes 2K in the 4:3 aspect ratio, the format offers true anamorphic capture with regular 2x anamorphic lenses and offers extra room for repositioning when using standard spherical lenses.

ALEXA ProRes 3.2K allows the same easy up-sampling in post to 4K UHD deliverables as Open Gate ARRIRAW does to 4K Cine. These formats, combined with ALEXA's unsurpassed overall image quality, make ALEXA SXT cameras suitable for any type of production with any distribution requirements.

The following resolutions are available with ProRes recording:

Sensor Mode Resolution
16:9	HD (1920 x 1080)
	2K (2048 x 1152)
	3.2K (3200 x 1800)
	4K UHD (3840 x 2160)
	2K Anamorphic (2048 x 858)6:5
	4K Cine Anamorphic (4096 x 1716)
4:3 2.8K (2880 x 2160)
	3.4K (3424 x 2202)Open Gate
	4K Cine (4096 x 2636)

ProRes RAID - Redundant Recording on XR and SXR Capture Drives

In ALEXA SXT cameras, ProRes is always recorded with a method (RAID) that provides redundancy for greater data security for both XR and SXR Capture Drives. As with ALEXA XT cameras, half the Capture Drive's capacity can be used to record ProRes, but with the SXT, the other half can be used to increase the safety of the recorded data.

ProRes RAID for XR Capture Drives

When XR Capture Drives are being formatted for ProRes in the ALEXA SXT, they are being formatted as a RAID 1 (mirrored) volume. XR Capture Drives contain two internal SSD drives, and with RAID 1 the same ProRes data is written to each of those two drives.

RAID 1 A1 A2 A3 A4 Disk 0 A1 A2 A3 A4 Disk 1

ProRes RAID for SXR Capture Drives

When SXR Capture Drives are being formatted for ProRes in the ALEXA SXT, essentially the same happens, but since SXR Capture Drives contain four internal SSDs, a combination of RAID 1 (mirroring) and RAID 0 (striping) is used, commonly referred to as RAID 10. Drives zero and one will be combined into one RAID 1 volume and drives two and three into another. This provides redundancy. The resulting two RAID 1 volumes are combined into one RAID 0 volume so it can be accessed as one volume.

graph TD
    A["RAID 0"] --> B["RAID 1"]
    B --> C["Disk 0"]
    B --> D["Disk 1"]
    B --> E["Disk 2"]
    B --> F["Disk 3"]
    G["RAID 1+0"] --> H["RAID 0"]
    H --> I["RAID 1"]
    I --> J["Disk 0"]
    I --> K["Disk 1"]
    I --> L["Disk 2"]
    I --> M["Disk 3"]

Downloading ProRes RAID Data

XR and SXR Capture Drives recorded in ALEXA SXT require Codex Production Suite 4.1 or later for downloading. Codex Production Suite 4.1 or later is included in new SXR Capture Drive Docks, or available free of charge for owners of older docks.

To download ProRes from XR and SXR Capture Drives recorded in ALEXA SXT, the ARRI RAID driver must be installed in the downloading Mac. The ARRI RAID driver is included in Codex Production Suite 4.1, but will not be installed by default. To install, check the "Capture Drive RAID support" box when installing the Codex Production Suite.

The ARRI RAID driver has been tested with Mac OS 10.10 und 10.11.

NOTICE

CAUTION! RAID redundancy is very helpful if data from one of the two internal drives is corrupted or one of the internal drives is damaged. But the XR or SXR Capture Drive still appears as one volume, and if it gets erased accidentally by the user, the data is gone.

CAUTION! While this redundancy is a great new feature, it creates some incompatibilities you should be aware of:

• If an XR or SXR Capture Drive that has been formatted on an ALEXA SXT should be downloaded on a Mac that does not have the ARRI RAID driver installed, the Mac cannot recognize the RAID formatted drive and will ask if this drive should be formatted. Don't format the drive, but install the ARRI RAID driver and try again.
• If an XR Capture Drive that has been formatted for ProRes on an ALEXA XT is then placed into an ALEXA SXT, the ALEXA SXT will not be able to read the drive and will ask if the drive should be formatted.
• If an XR Capture Drive that has been formatted for ProRes on an ALEXA SXT is then placed into an ALEXA XT, the ALEXA XT will only be able to see one of the two internal drives, and will therefore also only be able to format one of the two drives. Data may be left over on the other internal drive from the use in the ALEXA SXT. In order to avoid this, make sure to erase XR Capture Drives by formatting them in the ALEXA SXT or with a Mac at the end of your production.
• Please note that due to the camera's write pattern, there may be gaps in the clips which do not contain valid QuickTime data. These gaps may not be bit-identical on the individual SSDs unless the drives have previously been secure erased using the Codex Vault. This is normal and only relevant in cases where the date has to be restored manually.

Note: When working with ProRes clips without audio, Final Cut Pro 7 may fail during a Consolidate action as it does not recognize the file type correctly. To fix this problem, use the SetFile command line tool on all affected clips as follows: "SetFile -t MooV ", where needs to be replaced with the name of the affected clip. Then relaunch Final Cut and redo the Consolidate action.

ARRIRAW

ARRIRAW data delivers unencrypted, uncompressed and uncompromised image quality from an ALEXA camera. It offers the highest achievable resolution, the camera's natural color response and great exposure latitude as uncompressed and unprocessed sensor data. ARRIRAW images have only one channel. A color reconstruction algorithm calculates the missing components of each pixel based on the type and position of the array of colored filters (Bayer pattern) on the camera sensor.

ARRIRAW de-bayering is available through the ARRIRAW SDK or custom processing, which is implemented in most of the major post production tools for dailies processing and mastering.

The ALEXA sensor provides a horizontal resolution of 2.8K photo cells in 16:9 and 4:3 sensor modes, and 3.4K photo cells in Open Gate sensor mode, from which down or up-sampling routines can produce HD, 2K, 4K UHD or 4K Cine resolution images. For VFX, the images often are processed using the native sensor pixel count and then are up or down-sampled. Using this approach takes advantage of the luminance resolution, which correlates to the sensor pixel count. Up-sampling ALEXA images to 4K UHD or 4K Cine works very well due to ALEXA's excellent image quality.

The following resolutions are available with ARRIRAW recording:

Sensor Mode Resolution
16:9 2.8K (2880 x 1620)	3.2K (3168 x 1782)
6:5 2.6K (2578 x 2160)
4:3 2.8K (2880 x 2160)
Open Gate 3.4K (3424 x 2202)

The camera will automatically calculate a CRC32C checksum for the image data inside each ARRIRAW frame. This checksum is recorded onto the SXR Capture Drive or XR Capture Drive where Codex software uses it to verify the image content during all copying and processing steps. In addition to providing extra security, this also speeds up the copying process.

The checksum is also stored in the ARRIRAW header as metadata (fields 'ImageDataChecksumType' and 'ImageDataChecksum'), making it thus available to third parties. Note that this checksum does not validate the entire .ari file, only the image data itself.

Choosing a Recording Format

The selection of the recording format is a crucial decision which needs to be discussed with the production company and post production. While lower bit rate codecs offer longer recording times, they introduce compression artifacts that greatly limit the creative choices.

ProRes 422 Use for basic television production. Limited options in color correction.

ProRes 422 HQ Use for high quality TV production. Suitable for creative color correction.

ProRes 4444 Use for high quality TV and cinema production. Very suitable for creative color correction and visual effects work such as pulling mattes.

ProRes 4444 XQ The ideal choice for productions that are shooting for premium image quality, are looking for extreme color grading and want to preserve the superior tonal range of ALEXA's Log C signal.

ARRIRAW Use for cinema production, visual effects and high quality TV. Best format for creative color correction and visual effects work. Unencrypted and uncompressed format. Raw data needs to be processed into color images.

Always test the full workflow pipeline with the preferred recording format before shooting.

Media preparation

The typical usage cycle of recording media is:

1 Format
2 Record
3 Copy
4 Back up

5 Verify data

6 Format

Format Before recording, the drives/cards must be formatted. The camera always performs a blank format, which means that the media contain no metadata and are not assigned a reel number prior to recording the first clip. The camera auto-detects media with an invalid file system and asks the user to format the media. The ALEXA uses the UDF file system for ProRes recording and the Codex file system for ARRIRAW recording. Both file systems are read-only for computer systems, which minimizes the risk of data corruption.

Record When the REC button is pressed, the camera starts to write a clip to the media. With the first clip, the camera also assigns a reel number. There is more information on file naming later in this chapter.

Copy After recording is finished, the footage needs to be copied to another device in order to free up the media. The copy process should be verified using checksum calculation to ensure that no errors have occurred.

Backup The footage should ideally be copied to two physically separate destinations. The first copy should be the "working copy", and the second copy should be the "backup copy". These tasks can be done in parallel, as long as the end result is verified data on two independent devices.

Format Only when the data has been copied to two independent devices and verified, should the drive/card be formatted to clear all data. We recommend that the person who verifies the primary and back-up copies should also format the media. The camera crew then always receives an empty card and does not need to worry if the footage has already been copied from the drive/card. SxS cards and CFast 2.0 cards can be formatted with any file system, as they have to be reformatted by the camera anyway. SXR Capture Drives and XR Capture Drives can be formatted with the Codex software and do not require to be reformatted in the camera.

NOTICE

SxS PRO cards and CFast 2.0 cards currently cannot be formatted on Mac OS X 10.11 (EI Capitan) using the Disk Utility. To format these media, open the Terminal and enter the following command:

diskutil eraseVolume HFS+ empty /Volumes/A001R1FM/, where A001R1FM needs to be replaced with the name of your card.

File Structure for ProRes Recording

After an SxS card, CFast 2.0 card, XR Capture Drive, or SXR Capture Drive is formatted for ProRes recording in the camera, it is named ARRI_UDF until the first clip is recorded. Once a clip has been recorded, the name changes to the camera index letter and current reel number, which can be preset in the PROJECT menu. Clips are stored in a folder with the same name as the media.

In addition to the clips, recording writes an XML file and an ALE file.

The XML file is a Final Cut Pro 7 (FCP) XML file. When opened in Final Cut Pro 7, all clips are imported as one bin. If the clips are copied from the card to another destination, the file paths in the XML file have to be adjusted to match the new file location. The XML file is not compatible with FCP X.

The ALE file is an Avid Log Exchange file for Media Composer. It contains all static clip metadata, which is also embedded in each recorded clip.

For more information about ALEXA metadata, please refer to the ALEXA Metadata white paper, available at http://www.arri.com/camera/digital_cameras/downloads.

File Structure for ARRIRAW Recording (Codex VFS)

When an SXR/XR Capture Drive with ARRIRAW footage is loaded on a computer, it shows up like a regular external drive. Operating underneath, however, is the Codex Virtual File System (VFS). The VFS can present, for example, readily processed DPX files, MXF/DNxHD and/or QuickTime/ProRes proxies next to the original ARI files on the Codex volume. Except for the recorded data on the drive, none of these additional files actually exist. It's only when these files are requested, that they are generated, on-demand, and on the fly. Hence the term "virtual".

The file formats, file naming and directory structure that will be presented by the VFS are fully configurable through the Codex Platform software. This makes the VFS a highly flexible tool for providing exactly the material you require, when you want it, without redundant processing and storage overhead on your drives.

The default VFS configuration for the output of only ARRIRAW files uses the following file path:

///..

For detailed instructions on the Virtual File System configuration, please visit http://www.codexdigital.com/support/media-stations and download the Codex VFS Guide.

Codex VFS 1 of 86 selected Name Size Kind ▼ ari -- Folder ▼ A001R33F -- Folder ► A001C001_130326_R33F -- Folder ► A001C002_130326_R33F -- Folder ► A001C003_130326_R33F -- Folder ► A001C004_130326_R33F -- Folder ▼ A001C005_130326_R33F -- Folder A001C005_130326_R33F.1886772.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886773.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886774.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886775.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886776.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886777.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886778.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886779.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886780.ari 7 MB ARRIR...Image A001C005_130326_R33F.1886781.ari 7 MB ARRIR...Image Codex VFS ari ► A001R33F ► A001C005_130326_R33F

Fig. 43: Example of an XR Capture Drive using the VFS default file structure in Mac OS X

File naming scheme

ALEXA automatically names files as they are created on the recording media. While it is possible to change the file names later on a computer, it is not recommended, as the ALEXA naming scheme has been developed to minimize the risk of duplicate file names.

The file name consists of 6 parts:

• Camera Index: One character, A-Z. User assignable, should match the camera unit. For example, the camera index A can be assigned to the A camera, and B to the B camera.
• Reel Counter: 3 characters, 001-999. Auto-assigned to each drive/card, automatically advanced by one for each new drive/card. The user can change the counter for the next reel. This should only be done under special circumstances, such as after changing the camera body in the middle of a shoot.
• Clip Index: One character, fixed to C. Main use is to separate the reel counter from the clip counter. If more than 999 clips are recorded to one card (not likely to happen), it changes to D.
• Date: Current date, in order YYYYMMDD, as set in Menu>System/Time/Date, separated from the other naming components by underscores.
• Camera ID: Consists of a one letter prefix, user-adjustable between R and L, and the camera serial number encoded in 3 letters Base36 (0-9, A-Z).

The file name for ARRIRAW files on SXR/XR Capture Drives is controlled by the VFS configuration. We highly recommend to use the standard file naming convention "..", whereas "shot" automatically uses the ALEXA naming scheme described above.

The reel counter should be set to 001 at the beginning of a shoot. The camera will then automatically advance the reel number each time a new drive/card is loaded into the camera, formatted and recorded on. If a previously recorded drive/card is reloaded in the camera (comparable to a short end of a film roll), it will keep its reel number and the camera will continue the reel count. If the drive/card is loaded in another camera, the card keeps its name, but a new folder with the according camera ID and reel number is created in the root folder of the drive/card. It is possible, but usually not necessary, to manually change the next reel number in the Project menu.

Examples

A typical ProRes/Quicktime file name would look like this:

• A004C010_20130110_R1JL.mov

A typical ARRIRAW file name would look like this:

• A004C010_20130110_R1JL.1886777.ali

The translation of this name is as follows:

• This clip was the tenth clip recorded on the fourth reel.
• This clip was recorded on January 10, 2013.
- The camera assigned the Base 36 serial number 1JL, which translates into the decimal serial number 2001
- Frame number 1886777 on a 24 fps project translates to a time of day time code of 9:50:15pm and 17 frames.

Additional recommendations

To minimize the risk of lost data, ARRI suggests the following guidelines for data management:

• Pre-format your media. Format all the drives/cards in the camera before shooting begins. This will save production time at least until all cards have been used once. The media do not receive a reel number until the first clip is recorded, so there is no need to use the cards in the same order they were pre-formatted.
• Limit the recording time, especially on the drives. Compressed recording offers very long recording times. Please consider limiting the recording time to 30 minutes of footage per card/drive to reduce risk of loosing data.

• Download and back up data immediately after reloading the camera to minimize the time that data exists in just one place.

• On SxS cards, use the write protect tab before sending it to the data wrangler.

• After an SxS card has been downloaded and backed up, disengage its write protect before formatting.

Metadata

Metadata is stored in a Final Cut XML file, an Avid ALE file, in the recorded frames/clips and embedded in the HD-SDI signals. The most important metadata for post production workflow is the tape name, as it will be one of the primary identifiers used in the EDL. The term tape name is an existing post-production naming convention that is also used for nonlinear media. The terms tape name and reel name may be used interchangeably.

The tape name of ALEXA files is limited to 8 letters to match the CMX 3600 EDL standard. It consists of the Camera Index, reel counter and the Camera ID. Based on the previous example, the tape name of the clip would be A004R1JL.

Even if the user forgets to assign different camera indices to two cameras on the same project, the Camera ID metadata guarantees unique tape names.

The Quicktime file carries a single timecode track.

For more information, please refer to the Metadata white paper available for download on the ARRI website.

14.2 Monitoring

The ALEXA's monitoring options are the electronic viewfinder EVF-1 and the MON OUT. Surround View is available on both. With Surround View set to On, 10% additional pixels outside the recorded image area on the ALEXA's ALEV III sensor are displayed, allowing the operator to see outside the recorded image and keep unwanted objects, such as microphone booms or dolly tracks, out of the shot. To view only the recorded image, set Surround View to off.

To aid in framing, both the EVF-1 and MON OUT can display frame lines overlaid on the image. Frame lines can be considered electronic versions of ground glass markings in film cameras.

14.2.1 Frame Lines

A standard set of frame lines for different aspect ratios is provided in the camera, including:

• 1.33:1 (ARRI 1.33)
• 1.66:1 (ARRI 1.66)
• 1.78:1 (ARRI 1.78)
• 1.85:1 (ARRI 1.85)
• 2.39:1 (ARRI 2.39 Flat)
• 2.39:1 1.3x anamorphic (ARRI 2.39 Scope 1.3x)
• 2.39:1 2.0x anamorphic (ARRI 2.39 Scope 2x)

To create custom frame lines, use the Frame Line Composer on the ARRI website.

NOTICE

When shooting ProRes 2K (2048x1152) for a DCI 2K release in a 1.85:1 aspect ratio, the preloaded frame line ARRI 1.85 2K DCI can be used to mark the corresponding 1998x1080 area for a DCI 2K 1.85 without requiring any scaling in post production. This frame line is not available in HD mode (1920x1080).

14.2.2 Status Info Overlays

The ALEXA can display camera status information on EVF-1 and MON OUT.

At the top and bottom of the screen, the ALEXA displays textual status information. The top status bar consists of sensor FPS, shutter angle, exposure index and white balance. In the EVF-1, the status bar also works as a menu, allowing the user to change the values when the CAM button is pressed.

The bottom status bar displays information about the battery levels, recording/standby flag and remaining capacity of internal storage.

NOTICE

In SUP 1.0, the maximum size of a single clip is limited to about 229 GB. Therefore, the camera shows the remaining time for both the whole media as well as the current clip as soon as recording starts. During standby, the camera shows only the remaining time for the whole media.

On the left and right of the screen, icons provide information about the current status of the camera. The icons are organized into groups.

The left icon group is labeled SYS and contains information about the general system state of the ALEXA. On the right side, there are three groups labeled MON, EVF and LOOK. They provide specific information about MON OUT 1/2/3, EVF-1 and the application of ARRI Look File 2 files.

The following table explains the icons in the SYS group:

	Indicates that the current recording mode is set to ProRes.
	Indicates that the current recording mode is set to AR-RIRAW.
	Indicates that the current recording resolution is set to HD.
	Indicates that the current recording resolution is set to 2K Cine.
	Indicates that the current recording resolution is set to 2K Anamorphic.
	Indicates that the current recording resolution is set to 2.8K.
	Indicates that the current recording resolution is set to 3.2K.
	Indicates that the current recording resolution is set to 3.4K.
	Indicates that the current recording resolution is set to 4K Cine Anamorphic.
	Indicates that the current recording resolution is set to 4K UHD.
	Indicates that the current recording resolution is set to 4K Cine.
	Indicates that there is a warning condition in the camera.
	Warns that the camera has detected an error.
	Indicates that the camera temperature is outside of its optimal range.
	Warns that the camera temperature has reached a critical point where it can no longer be operated and must be powered down.
	Indicates that prerecording is activated.
	Indicates that audio recording has been switched on.
	Warns that audio recording has been switched on, but is currently disabled, e.g. because of an off-speed framerate.
	Indicates that the camera controls are locked.Only shown in EVF-1
	Indicates that the motorized sliding ND filter is in the optical pathOnly for ALEXA SXT Studio
	Indicates that a frame grab is currently in progress.
PRes	Indicates that the current recording mode is set to ProRes.
RET	Indicates that the signal from the RET IN connector is currently being displayed.

The following table explains the icons in the MON and EVF group on the right:

Icon Description
LOG	Indicates that the processing of the respective output is set to Log C.
LOOK	Indicates that the processing of the respective output is set to ARRI Look File 2 file.
A709	Indicates that the processing of the respective output is set to ALEXA Classic 709.
PEAK	Warns that peaking is active on the respective output.
SMTH	Warns that smooth mode is active in the EVF-1.

14.3 Using Timecode

Timecode ensures that every image of recorded media can be identified with a unique value and synced with corresponding media, such as sound or the second camera in a 3D application. When used with other metadata, such as reel names, all recorded media maintains its unique identity.

Following are two ways timecode can be used on a production:

External TC, Time of day

- Use: This format is often used on multi-camera productions with sync-sound. When all cameras are running at sync-sound speed, which is also the project frame rate, sound and image time code match and allow for easy syncing in post.

- Setup: The sound department acts as the timecode master, and generates timecode which uses the time of day as a value, and a time base matching the project frame rate. Twenty-four hours of time will translate into twenty-four hours of time code.

Timecode is fed to the camera via the TC connector. The timecode source must be set in the camera to Ext LTC and the mode to Free Run. The project fps setting must match both the sensor frame rate and the time base of the external timecode signal. The camera can be set to use Jam sync generator, in which it samples the timecode value once and then continues counting based on its own high-precision crystal clock. The timecode source can be disconnected from the camera after jamming in Jam sync generator mode. This mode ensures stable timecode with an offset of less than one frame for each eight hours, after which the camera has to be re-jammed.

Alternatively, the camera can be set to regenerate mode, or Regen on the TIMECODE OPTIONS screen. In Regen mode, the camera uses the timecode value of the external timecode source. This ensures correct timecode for an infinite duration, but the timecode source must remain connected to the camera. Note that the camera ignores external timecode during record and counts using its internal clock to avoid timecode jumps should connection problems arise, e. g. due to a faulty timecode cable.

• Variations: If shooting starts close to midnight, the timecode might be started with an offset time of day to prevent a rollover at midnight.
• Restrictions: External timecode is only possible if the camera is running at sync-sound speed. If the camera is over- or under-cranking, the timecode frame rate will no longer match the sensor framerate, and timecode values would either be duplicate or dropped. To prevent this, the ALEXA will automatically switch to Int TC source and Regen mode when the sensor frame rate is changed.

Internal TC, Rec Run

• Use: Record run timecode is often used on single camera productions that are either MOS or use a dumb slate to sync picture and sound. Record run timecode guarantees continuous timecode on all recorded data. Record runtime code also works with over- and under-cranking.
• Setup: The timecode source must be set to Int TC, the mode to Rec Run and the generator to Regen. Timecode counts up only during recording, by one frame for each image generated by the sensor. The timecode counts at the project frame rate set on the camera. Normally, the timecode hour value advances by one hour for each new reel, using only hours 01-20 for reel 1-20, and then restarting at hour 01 for reel 21.
• Variations: Record run timecode might be used for off-speed work on productions that use external timecode sources for all sync sound.
• Restrictions: None.

14.4 Syncing the Sensors of Two Cameras

Two ALEXAs can be synced for 3D applications or any application requiring sensor sync using the EXT connectors and corresponding cable. When synced, images are captured from each camera's sensor at precisely the same time.

NOTICE

• Syncing two sensors is possible at frame rates of at least 1.000 fps.
• Use both sensor sync and settings sync (see next chapter) in 3D setups.

To sync the sensors of two ALEXAs:

1. Connect an EXT cable KC 155-S to the EXT ports on each ALEXA.
2. In the System menu on the master camera, select External Sync.
3. On the EXT SYNC screen, set Sensor sync to EXT master.
4. In the System menu on the slave camera, select External Sync.
5. On the EXT SYNC screen, set Sensor sync to EXT slave. It takes approximately five seconds for the two ALEXAs to sync.

The master camera triggers the slave camera so that images are created at the same moment of time with an accuracy of 10 s. Whenever an error occurs, the camera will issue a warning.

Image integration between master and slave camera has a locked offset of less than 10 s. This means that in the worst case, exposure differs by 4.3% (@ 60 fps frame rate and 5.0° shutter angle). With a regular exposure time (24 fps, 172.8°), the maximum difference is 0.05%.

Synchronizing Image Output

The MON OUTs of two ALEXAs can also be synchronized. To achieve this, the user must send a trigger from the master camera to the slave camera after sensor sync is established.

To sync the MON OUTs of two ALEXAs:

1. Ensure that the sensors of the two ALEXAs are synced.
2. Ensure that MON OUT fps equals sensor fps.
3. In the System menu on the master camera, select External Sync.
4. On the EXT SYNC screen, select Send HD sync trigger.
5. Press the jogwheel to send the trigger to the slave camera.

The camera will display the message HD sync trigger sent to slave camera!. If the sensors are not synced, the camera will display the error message Trigger not sent. Camera must be set to Ext sync: Master!.

After the sync trigger has been sent, the slave camera will no longer display the warning HD outs not synced. Trigger now!.

If the two cameras' settings are synced over Ethernet, the trigger is automatically sent.

When the outputs are synced, jitter between the two cameras' HD outputs is less than 500 ns. The HD output of each camera can be advanced or delayed by up to 30 HD clocks (1 HD clock=13.46 ns), allowing for a total shift of 60 HD clocks (808 ns total) between cameras.

Timecode

Timecode is also transmitted from the master to the slave over the EXT cable. When a camera has been set to slave, it automatically uses the timecode values transmitted over the EXT cable. The TC screen will display EXT TC from master camera as TC source, and all options are disabled. Only the master camera outputs LTC timecode on its TC connector.

NOTICE

• In a setup with sensor sync, but without settings sync, recording needs to be started first on the slave camera, and then on the master camera.
• When the mirror shutter is switched on, an ALEXA Studio can only be synced to another ALEXA Studio.
• Recording on the slave camera may stop a few frames later than on the master camera. Sync up the clips by timecode to ensure matching master/slave footage.

14.5 Syncing the Settings of Two Cameras

Two ALEXAs can be operated with synchronized settings. ARRI recommends to sync the settings of the same ALEXA models only, for example, two ALEXA Plus models.

Camera connection

The settings of two ALEXAs can be synchronized over ethernet using the ALEXA Ethernet/Ethernet Cable KC 156-S, or over an ethernet hub using the ALEXA Ethernet/RJ-45 Cable KC 153-S.

Camera setup

To sync the settings of two ALEXAs over Ethernet:

1. Connect an ALEXA Ethernet/Ethernet Cable KC 156-S to the EXT ports on both ALEXAs, or an ALEXA Ethernet/RJ-45 Cable KC 153-S to the ethernet hub and the EXT port of each ALEXA.
2. In the System menu on the master camera, select External Sync.
3. On the EXT SYNC screen, set Settings sync to ETH master.
4. In the System menu on the slave camera, select External Sync.
5. On the EXT SYNC screen, set Settings sync to ETH slave. The two ALEXAs will automatically negotiate IP addresses. It takes approximately five seconds to establish a connection.

The master camera will initially distribute its settings to the slave camera. Once this is done, settings can also be changed on the slave camera, and the change will take effect on both cameras. This is useful if the master camera's controls are not accessible.

If a camera is set to ETH master or ETH slave, but is not connected to another camera, a warning is displayed on the STATUS Info screen.

Synced settings

The following settings are synced when syncing two ALEXAs:

WB>White Balance + CC Tint

EI>Exposure Index

FPS>Sensor FPS

SHUTTER>Shutter Angle

COLOR>REC Processing

COLOR>MON OUT 1 Processing

COLOR>MON OUT 2 Processing

COLOR>MON OUT 3 Processing

MENU>Recording>Resolution

MENU>Monitoring>EVF>Anamorphic desqueeze

MENU>Monitoring>MON OUT 1>Frame rate MENU>Monitoring>MON OUT 1>Scan format MENU>Monitoring>MON OUT 1>Status info MENU>Monitoring>MON OUT 1>Surround view MENU>Monitoring>MON OUT 1>Surround mask MENU>Monitoring>MON OUT 1>Framelines MENU>Monitoring>MON OUT 1>Anamorphic desqueeze

MENU>Monitoring>MON OUT 2>Frame rate MENU>Monitoring>MON OUT 2>Scan format MENU>Monitoring>MON OUT 2>Status info MENU>Monitoring>MON OUT 2>Surround view MENU>Monitoring>MON OUT 2>Surround mask MENU>Monitoring>MON OUT 2>Framelines MENU>Monitoring>MON OUT 2>Anamorphic desqueeze

MENU>Monitoring>MON OUT 3>Frame rate MENU>Monitoring>MON OUT 3>Scan format MENU>Monitoring>MON OUT 3>Status info MENU>Monitoring>MON OUT 3>Surround view MENU>Monitoring>MON OUT 3>Surround mask MENU>Monitoring>MON OUT 3>Framelines MENU>Monitoring>MON OUT 3>Anamorphic desqueeze

MENU>Project>Project fps

The slave camera also takes over the Camera ID of the master camera, so file names are identical except for the Camera ID prefix. It is important to give the master and the slave camera different Camera ID prefixes to prevent duplicate file names.

When formatting media in settings synchronized cameras, the next reel count of the master camera takes effect.

NOTICE

• An error will be triggered on pressing record when at least one of the synced cameras is not ready for recording (e.g. because of missing medium).
• Automatic white balance for synced cameras can only be initiated on the master camera.
• Sensor mode needs to be switched manually on all synced cameras. Do not start recording until all cameras have loaded the same sensor mode.
• Prerecord does not work in combination with settings sync.

15 ALEXA SXT Plus

The ALEXA SXT Plus has a special side cover that contains extended electronics and offers the following additional functions over the standard ALEXA SXT EV:

• Built-in radio system for wireless remote control of lens and camera
• A level sensor to determine the camera's tilt and roll in degrees
- Three CLM (Controlled Lens Motors) ports for driving CLM-2, CLM-3, CLM-4, CLM-4 Plus, and CLM-5 motors or LDE-1 data encoders
- Two LCS (Lens Control System) bus interfaces for connecting WCU-3, WCU-4, WHA-3 and ZMU-3 hand units
• LDS Lens Data System for reading lens data from LDS lenses
- Depth of field calculation for LDS lenses and LDA (Lens Data Archive) lenses in combination with calibrated lens motors
• LDD (Lens Data Display) interface
• Control of LDS, radio, and lens motors through the camera user interface
A third RS socket
• A forth MON OUT output
- An additional function button labeled WRS (Wireless Remote System). It gives access to the WRS screen, from where all camera settings related to the Plus camera features can be adjusted.

Any ALEXA SXT EV can be upgraded to an ALEXA SXT Plus by installing the Plus module.

NOTICE

• The Plus module must be installed by an authorized ARRI service center only.
• All features described in this Chapter are also available on ALEXA SXT Studio.

WRS IRIS ZOOM FOCUS ARRI® SD CARD

Fig. 44: CLM sockets

REF/SYNC IN MON OUT 2 EXT REC OUT 1 REC OUT 2 BAT RS 100 LS LS LEXN PLUS ETHERNET

Fig. 45: ALEXA SXT Plus connectors

15.1 Radio System

The ALEXA SXT Plus module contains a radio unit that enables wireless lens control, lens data communication and remote control of basic camera functions. The radio system is called white radio and it can be identified by a white ring at the base of the antenna mount point. It offers 8 channels to choose from:

Channel Frequency
0 2.410 GHZ
1 2.415 GHZ
2 2.430 GHZ
3 2.435 GHZ
4 2.450 GHZ
5 2.455 GHZ
6 2.470 GHZ
7 2.475 GHZ

White radio and legacy yellow radio cannot be mixed in the same radio network of camera and hand units. It is possible to use both systems in parallel within different radio networks.

Up to three hand units can be connected to one camera in parallel to form a radio network.

NOTICE

When a camera is set to "Sensor sync: EXT slave", its radio module automatically switches itself off, and the camera receives CLM control commands from the Master camera via the EXT cable.

15.2 Wireless Remote System

15.2.1 Setting the region of the wireless function

CAUTION!

Wireless region settings specify where the wireless function can be used in compliance with local regulations. It may be illegal to use the wireless function in a region other than specified in the setting. Please ensure that the region is configured correctly, e.g. when traveling.

▶ Press the WRS button. Choose RADIO > WRS REGION and select the region. You have the following options:

For further information see image bellow. Find your country/ region in the left column and the respective setting in the upper row. In case of doubt please contact ARRI Service to ensure that the region is configured correctly (e.g. when traveling). Note all settings fulfill FCC requirements.

Setting Region	Europe	USA	Japan	World
Europe	x			x
USA+Canada		x		x
Japan			x	x
AUS/NZ	x			x
Taiwan,		x		x
South Korea			x	x
China		x		x
Phillipines	x			x
Thailand	x			x
Israel	x			x
South Africa	x			x
Singapore	x			x
U.A.E.	x			x
India	x	x		x
Egypt	x			x
Russia	x			x
Europe	x			x

Fig. 46: Region setting for ARRI WRS

15.2.2 Lens Motors

The ALEXA SXT Plus supports ARRI CLM-2, CLM-3, CLM-4, CLM-4 Plus, and CLM-5 motors and the LDE-1. CLM-1 motors are not supported. CLM-2, CLM-3, CLM-4, CLM-4 Plus and CLM-5 motors can be used in a mixed setup.

NOTICE

Use only one lens motor per lens axis.

Lens motors should be connected, according to their position on the lens, to the IRIS, FOCUS and ZOOM sockets on the camera-right side.

Motor calibration

After connecting a lens motor to the camera and the lens, it must be calibrated. The lens motor must be recalibrated under the following conditions:

• when the lens motor is detached from the lens
• after a camera reboot
• after changing lenses
• after a change in motor position while powered down

NOTICE

Omitting motor calibration might lead to damage of the lens due to the high level of motor torque.

To calibrate a motor:

1. Press the WRS button.
2. Select a motor by pressing the IRIS CLM, ZOOM CLM or FOCUS CLM button.
3. Press CALIBRATE to start calibration of this motor only, or CAL. ALL to start calibration of all motors.

Motor direction

The direction of the motors can be set in the ALEXA's menus.

To set the direction of a motor:

1. Press the WRS button.
2. Select the motor by pressing the IRIS CLM, ZOOM CLM or FOCUS CLM button.
3. Press the LEFT or RIGHT button to set the direction of the lens motor.

Motor torque

For all supported motors except for CLM-2 motors, the motor torque can be set in the ALEXA's menus.

To set the torque on a lens motor:

1. Press the WRS button.
2. Select the lens by pressing the IRIS CLM, ZOOM CLM or FOCUS CLM button.
3. Press the +1 or -1 buttons to increase or decrease the motor's torque. Available torque settings are 1 to 4, with 1 being the lowest torque level.

NOTICE

Ensure that the motor torque level matches the lens to avoid lens damage.

3D lens sync

When two ALEXA SXT Plus cameras are set to Sensor sync EXT master and EXT slave, the slave camera will switch off its radio module and receive motor control commands from the master camera over the EXT connection.

NOTICE

• Matching of the master and slave cameras' lenses in terms of focus, iris and zoom ring positions depends on the mechanical accuracy of the lenses. Make sure the lenses in use are matched as closely as possible. Use only lenses of the same focus classification to minimize positional errors. Deviating focus positions of non-matching lenses cannot be compensated.
• At higher focus distances, even a very small position error of the lens ring results in a great difference of indicated focus values. Therefore, even a pair of matching lenses in a 3D lens sync setup may show different focus values.

Lens Data Encoder LDE-1

The LDE-1 generates lens data in situations when an ALEXA Plus or ALEXA Studio model (or an UMC-4) is being used without an LDS lens or an ARRI lens motor. Thus the LDE-1 extends the abilities of the ARRI Lens Data System to all lenses and cameras setups. The LDE-1 is compatible with ALEXA SXT Plus and ALEXA SXT Studio models or with the ALEXA SXT EV models when used with the Universal Motor Controller UMC-4. The LDE-1 contains an encoder that delivers lens data to the camera and can be used in parallel with a manual follow focus unit or a third-party wireless lens control system.

15.2.3 Hand Units

For detailed information of the hand units, please refer to the device's own manuals.

Wireless Compact Unit WCU-4

The WCU-4 is an all-inclusive and yet affordable hand unit offering up to 3-axis lens control. It includes a newly designed, super-smooth focus knob with adjustable friction and backlit, optionally pre-marked focus rings that are well readable in the dark without distracting performers. The whole unit is completely splash proof for ARRI-typical reliability. The slider has its scale on the 3" display, providing clearly readable T-stop numbers and optional on-screen markings. If preferred, the slider can be also set to show zoom scales. With the additional ALEXA Remote license, the WCU-4 shows extended camera status information and allows to change camera parameters from the remote unit.

Wireless Compact Unit WCU-3

The WCU-3 is a compact hand unit featuring a radio system to connect to the camera wirelessly. It has two LCS ports for connecting the device to the camera via cable and to attach a ZMU-3. A wheel and a slider can be used to control focus and iris axes. Zoom axis can be controlled by attaching a ZMU-3 at an LCS port.

The WCU-3 also has a display where it shows current fps, shutter angle, exposure index and white balance of the camera.

Wireless Main Unit WMU-3

The WMU-3 is a radio system for wireless connection to the camera. Both WFU-3 and WZU-3 can be attached to the WMU-3.

Wireless Focus Unit WFU-3

The WFU-3 has a knob and a slider that can be used to control focus and iris axes. It connects to the camera through a WMU-3 or a WHA-3.

Wireless Zoom Unit WZU-3

The WZU-3 controls the zoom axis. It connects to the camera through a WMU-3 or a WHA-3.

Wired Hand Adapter WHA-3

The WHA-3 allows both WFU-3 and WZU-3 to connect to the camera via cable.

Zoom Main Unit ZMU-3

The ZMU-3 controls the zoom axis. It can be connected to the camera via cable to an LCS port, or via cable through an LCS port of an WCU-3, or wirelessly by using a WZE-3.

Wireless Zoom Extension WZE-3

The WZE-3 is a radio system that enables direct wireless connection of a ZMU-3 and a camera.

Hand Unit Priorization

Different priority levels are assigned to the hand unit devices to ensure only one device has control over a motor at a time.

A device's knob that is assigned to an axis has a higher priority than a device's slider assigned to the same axis. When steering items of the same type are assigned to the same axis, the one connected via WRS has highest priority, second highest priority has a device cable on the upper LCS port, the lower LCS port has the lowest priority. Of two radio devices with the same steering items assigned to the same axis, the one that connects to the camera first gains control.

Cabled devices can gain control of an axis at the time of connection. Wireless devices must be rebooted if an axis has become idle before they can gain control.

An exception to the rule are devices on the zoom axis. Here the cabled devices have the highest priority, with LCS port 1 having priority over LCS port 2.

15.3 Lens Data Display LDD-FP

The Lens Data Display for Focus Pullers LDD-FP can be used to display lens information. Connect it to the LDD port of the Plus module.

15.4 Plus Camera Controls

The ALEXA SXT Plus has an additional function button labeled WRS (Wireless Remote System). It gives access to the WRS screen, from where all camera settings related to the Plus camera features can be handled.

The WRS screen gives an overview of radio status, camera level, LDS status, and CLM status. The screen buttons lead to screens containing more detailed info on these topics and where settings can be changed.

RADIO Channel: 3 Units: 1 Ready CAM LEVEL Tilt 0.0° Roll 0.0° LENS DATA Zeiss UP 85 T1.8 LDA Ready Ready Dir: Left Torque: 1 IRIS CLM Ready Dir: Left Torque: 0 ZOOM CLM Ready Dir: Left Torque: 0 FOCUS CLM

Fig. 47: WRS screen

RADIO

Shows the currently set radio channel, the number of connected hand units and the staus of the radio system. Pressing the RADIO button opens a screen where radio can be set on or off, the channel number can be set, and the WRS region can be set. When radio is switched on, a small icon appears in the camera HOME screen.

WRS>RADIO
WRS radio power	Off
WRS radio channel	3
WRS region	World

Fig. 48: WRS radio screen

CAUTION!

WRS region settings specify where the wireless function can be used in compliance with local regulations. It may be illegal to use the wireless function in a region other than specified in the setting. Please ensure that the region is configured correctly (e.g. when traveling).

CAM LEVEL

Shows the tilt and roll of the camera in degrees as measured by the camera's position sensor. This sensor can be reset if it appears to have an offset. Press the CAM LEVEL screen button to access the reset screen. By pressing the two lower outer screen buttons simultaneously, the sensor is reset.

NOTICE

The sensor can only be reset while both axis are within a threshold of +/-10 degrees around 0.

1. Level camera Tilt: 0.0° Roll: 0.0° Reset threshold OK 2. Reset motion sensor Press both buttons! RESET RESET

Fig. 49: Motion sensor reset screen

LENS DATA

85.0mm t 16.5 1.0m 4.8m 3.1m ARRI Zeiss UP85 T1.8 OPTIONS LDA

Fig. 50: LDS info screen
Shows the type of LDS lens connected and the LDS status. The LENS DATA screen button leads to the LDS screen, where lens type, current focal length, iris, focus distance and close and far point of depth of field are shown.

The OPTIONS screen button opens the LDS options screen, where the following parameters can be set:

Lens distance unit	MetricImperialDefault unit (as provided by the lens)
Circle of confusion	0.013 mm0.025 mm0.035 mm0.050 mm
LDS mount	OnOff
Lens squeeze factor Link to the Project menu

NOTICE

• When setting LDS mount to Off, it is possible to use a lens table from the Lens Data Archive (see below) with an LDS lens, and ignore data coming from the lens itself. To re-enable the LDS mount, set the parameter to On, detach the lens and re-attach it.
• After connecting a new LDS lens, turn all lens rings slowly until all lens axes have transmitted their current positions.
• Cooke /i lenses need to have a firmware version of 0.39 or higher to work properly with the camera.

LDA

When a non-LDS lens is connected, the user can achieve LDS functionality by using the Lens Data Archive. In the LDS screen, a button labeled LDA appears when a non-LDS lens is connected.

The LDA screen consists of a user list and a main archive list. The user list should only contain the lenses currently used to achieve quick access to the desired lens tables. The main archive contains a set of lens tables for ARRI/Zeiss High Speeds (also known as Super Speeds), Master Primes and Ultra Primes and can be extended with additional lens tables for any PL-Mount lens.

NOTICE

Custom lens tables may have to be created manually beforehand.

Pressing the LDA button opens the User LDA screen. Select a lens table and press the wheel. After calibrating the lens motors, the LDS functionality can be used.

DELETE USER LDA ADD OPTIONS RESET LDA

Fig. 51: USER LDA screen

To add a lens table from the main archive, access the User LDA screen and press the ADD button. This opens the MAIN LDA screen. From the main archive, first select a lens type, then a lens model and then a lens class. The lens class can be found on the lens barrell below the infinity symbol of the focus scale. Select to add the lens table to the user list (Press ADD), use it without adding (USE), or both (ADD+USE).

DELETE ADD MAIN LDA ARRI Zeiss HS ARRI Zeiss MP ARRI Zeiss UP

Fig. 52: Main LDA screen

To delete a lens table from the user archive, access the user list and press the DELETE button. Select the lens table to delete and press the two buttons labelled DELETE simultaneously.

Custom lens tables can be added to the main archive via the SD card. Place the lens table on the SD card in a folder named "LDA". Insert the SD card into the camera. Go to the main archive list and press ADD. Select the desired lens table and press the wheel. The lens table will be located in the main archive as lens type "Custom".

It is possible to inverse the iris, zoom and focus scales for lens tables if necessary. Press OPTIONS on the USER LDA screen to access the LDA OPTIONS screen, where these adjustments can be made.

Lenses can also be equipped with the lens data mount LDM. The mount contains a chip with the lens table stored inside, so the lens transmits its data to the camera as soon as it is connected. For information on current ring positions, these lenses must be used in combination with controlled lens motors.

CLM screens

The screens for IRIS, FOCUS and ZOOM controlled lens motors all have the same layout. They show the motor type, motor direction, motor torque, and motor teeth count mode.

NOTICE

For CLM-2 motors the torque value is greyed out as torque is only active for CLM-3, CLM-4, CLM-4 Plus, or CLM-5 motors. It can nonetheless be changed in case a CLM-3, CLM-4, CLM-4 Plus, or CLM-5 motor might be used but is currently not at hand.

In addition, a lens motor calibration can be triggered, either for all lens motors, or only for the one featured in the particular screen.

NOTICE

When starting a motor calibration, make sure each motor's gear wheel is connected properly to the lens. Pay extra attention that no one is close to the motors or holding them. Catching a finger, cloth or anything else on the motor's gear wheel can cause severe body harm as well as damage to the system (and not to mention hurt like hell).

The image below shows the FOCUS CLM screen:

CALIBRATE

DIRECTION

+1

FOCUS CLM

CLM-4

DIRECTION

Left

TORQUE

0

Teeth mode: Auto (50t)

CAL. ALL

TEETH

-1

▶ Press CALIBRATE to start calibration of the selected motor.
▶ Press CAL. ALL to start calibration of all motors simultaneously.
▶ Press DIRECTION to toggle motor direction between Left and Right.
▶ Press TEETH to toggle motor teeth count between:
。 Auto (detected teeth count in brackets)
。 40t
。 50t
。 60t

▶ Press +1 or -1 to adjust motor torque.

3D Lens Sync

When two cameras are connected and their sensors are synced with via the EXT connectors, the slave camera will receive its motor commands from the master camera. Its radio module switches automatically off. Calibration of lens motors must happen individually for each camera.

16 ALEXA SXT W

Professional video camera with attached radar and antenna module (no visible text or symbols)

The ALEXA SXT W extends the features of an ALEXA SXT Plus by:

• a WiFi module that allows clients to connect to the camera, e. g. for remote live grading.
  • a high quality, low latency HD video transmitter.

16.1 WiFi

The WiFi module in the ALEXA SXT W acts as an access point and opens up a wireless network in the 2.4 GHz band. The name of the network is "Alexa-SERIAL#", where SERIAL# is the serial number of the camera, and it uses WPA-2 encryption. The default password for the network is set to "arriarri".

The camera selects the WiFi channel automatically to minimize interferences. It is not possible to change the channel manually.

The WiFi configuration can be found at MENU > SYSTEM > NETWORK/WIFI.

It offers the following options:

WiFi power Select to turn WiFi power on or off

WiFi host password Select to enter the password for the WiFi network

NOTICE

When activating or deactivating the ARRI Wireless Remote System (WRS, also known as Electronic Control System (ECS) or "white radio"), the WiFi module changes its channel to minimize interferences. Devices connected via WiFi will lose their connection temporarily, but most devices reconnect automatically.

If the camera is connected via WiFi and Ethernet, ensure that no other device on the network uses the IP address 169.254.0.11.

Connecting to the web remote

The steps to connect to the web remote differ depending on the device that is used for accessing. The camera does not have an integrated DNS or DHCP server. Instead it uses zeroconf to setup the network, which is natively supported by Apple devices and which can be installed on other operating systems. Certain parameters need to be configured manually on devices that do not support zeroconf.

Devices supporting zeroconf

1. Connect to the camera's wifi.
2. Open a browser on the device
3. Enter http://alexaSERIAL#.local, where SERIAL# is the serial number of the camera.

Devices not supporting zeroconf

1. Look up the camera's IP address at INFO>SYSTEM.
2. Connect to the camera's wifi.
3. Set the IP settings of the device to static IP (not DHCP).
4. Assign an IP address where the first three numbers are identical to the camera's IP and the last number is different and in the range of 1 - 254.
   Example: If the camera has the IP address 169.254.68.152, a valid IP for the device would be 169.254.68.150.
5. Open a browser on the device
6. Enter http://IPADDRESS to open the web remote, where IPADDRESS is the IP address of the camera.
   Example: If the camera has the IP address 169.254.68.152, enter http://169.254.68.152

NOTICE

Devices may continuously show a symbol suggesting that it is still trying to connect to the camera, although the connection is already established. The connection is functional nevertheless.

16.2 Wireless Video

The HD video transmitter transmits the video signal of MON OUT 3 to a Wireless Video Receiver (WVR-1) or Transvideo Starlite ARRI-WVS monitor.

It can wirelessly transmit at 5 GHz up to a distance of 600m with less than 1 ms delay. The transmission is always secured by 128bit AES encryption and is uncompressed.

The camera can transmit to up to four receivers simultaneously.

NOTICE

The WVS is not compatible with any other wireless video transmission system. Only devices with the same region setting are compatible with each other.

OPEN 1 2 3 ● NETWORK ● USER ● POWER ● PAUL

1 Wireless video antennas
2 Status LEDs: Network, Video, Power
3 PAIR button

16.2.1 Preparation

1 Screw on two antennas on top of the HD video transmitter to the antenna connectors.
2 Attach a battery to the battery adapter on the back of the camera or use a power supply to power the camera.
3 Turn on the HD video transmitter in the camera menu and pair it to one or more receivers.

16.2.2 Status LEDs

LED Status
Network	Solid: Connection is establishedNormal blinking: Device is in listen modeFast blinking: During link setup mode (very short period)Fast blinking: During registration (pairing button was pressed)Very fast blinking: System error
Video	Solid: Video signal is established and locked inNormal blinking: Video source is not supportedVery fast blinking: System error
Power Shows if wireless device is powered

16.2.3 Pairing camera and receivers

To transmit video content from the camera to a WVR-1 or Transvideo Starlite ARRI-WVS, it is necessary to pair the devices. Pairing describes the function of connecting a transmitter to one or more receivers. The pairing needs to be confirmed at both devices with the push of the PAIR button. The pairing process is accompanied by a specific pattern of indicators through LEDs blinking on the devices.

Precondition:

▶ Select MENU > MONITORING > MON OUT 3 / WIRELESS VIDEO and ensure that Wireless video power is set to On.

MENU>MONITORING
Electronic viewfinder	>
MON OUT 1	>
MON OUT 2	>
MON OUT 3 / Wireless video	>
Frame lines	>
Electronic horizon sensitivity	1x

MENU>MONITORING>MON OUT 3
Wireless video power	Off
Frame rate	24 On
Scan format	p
Surround view	On
Frame lines + status info	>
Peaking	Off>

Pairing:

1. Make sure the transmitter and receivers you want to pair are at least 1 m apart.
2. Turn on WVR-1. Make sure no other transmitters and receivers are powered up.
3. Press PAIR on WVR-1 until NETWORK LED blinks fast.
4. Press PAIR on the camera until NETWORK LED blinks fast.
5. Pairing is complete when NETWORK LEDs turn to solid.
6. Repeat the procedure for each additional WVR-1.

During the pairing process, the external monitor to which the WVR-1 is connected should show the following information:

1 "Registration in Progress"
2 "Searching for Camera Unit ..."

For instructions on pairing the camera with a Transvideo Starlite ARRI-WVS, please see the manual of the Transvideo Starlite ARRI-WVS.

NOTICE

If four receivers are paired to a transmitter, and another receiver is paired, the first of the already paired receivers will be unpaired and the new one will be added. The adding of new receivers works in a cyclic first-in first-out order.An inactive receiver stays paired to the transmitter. If a fifth receiver is added to a setup with one inactive and three active receivers, the new receiver does NOT replace the inactive one. In this case, there is no differentiation between active and inactive devices. The rule mentioned above still applies.

NOTICE

Before pairing two devices, make sure that there is at least 1 meter / 3.3 feet distance between the devices.

16.2.4 Supported resolutions

1080p 23.976, 24, 25, 29.97, 30, 50, 59.94, 60
1080i 48, 50, 60
1080psf	23.967 (displayed as 1080i48)24 (displayed as 1080i48)25 (displayed as 1080i50)29.97 (displayed as 1080i60)30 (displayed as 1080i60)

16.2.5 Supported frequencies

Frequency	US	EU	JAP
5190 MHz	√	√	√
5230 MHz	√	√	√
5270 MHz, DFS	√	√	√
5310 MHz, DFS	√	√	√
5510 MHz, DFS	√	√	√
5550 MHz, DFS	√	√	√
5590 MHz, DFS	√	√	√
5630 MHz, DFS	√	√	√
5670 MHz, DFS	√	√	√
5755 MHz	√	NA	NA
5795 MHz	√	NA	NA
5835 MHz	NA	NA	NA

16.2.6 Sample setups

The number of WVS systems that can be used in parallel depends on the number of channels available, which is different for each region, and the radio noise present. In general, four to six systems can work in parallel.

It is possible to pair one ALEXA SXT W with up to four receivers (either the WVR-1 or the Transvideo Starlite ARRI-WVS). See an example setup below.

WVR-1 Starlite ARRI-WVS

NOTICE

It is not possible to pair one WVR-1 with more than one ALEXA SXT W.

16.2.7 Software update

To up- or downgrade the HD wireless video module, it is necessary to connect it via USB to a Windows computer that runs the ARRI Wireless Video software, which is available for download on the ARRI web page. You need to have the current firmware installation file available to perform the upgrade. The user software guides you through the process of up- or downgrading.

NOTICE

The firmware up-/downgrade process of the wireless video module is separate from the regular ALEXA Software Update Packet (SUP) updates.

CAUTION!

Do not switch off power and do not remove the USB cable during the update, as this may damage the wireless video module.

17 ALEXA SXT Studio

The ALEXA SXT Studio extends the features of an ALEXA SXT Plus by:

- Optical viewfinder: Unique construction from ARRI, featuring optical anamorphic desqueeze, diopter correction, image flip, camera left/right positioning and horizontal distance adjustment

- Electronic mirror shutter: The electronic mirror shutter can be adjusted in a range of 11.2° to 180.0° degrees. When in use, it completely removes rolling shutter effects of the sensor.

- Built-in motorized ND filter: The ND filter has a density of 1.3 (= 4.3 stops) and can be moved in and out of the optical path with the push of a button. It is located between the mirror shutter and the image sensor, so the optical viewfinder image is not affected by the filter and stays bright.

17.1 ALEXA Studio Images

Exterior view of a mechanical optical instrument (no visible text or symbols)

Exterior view of a black ARRI audio recording device with control panel and antenna (no visible text or symbols)

Top-down view of a mechanical device with visible internal components and mounting features (no text or symbols)

17.2 Optics

17.2.1 Electronic Mirror Shutter

The electronic mirror shutter is located between the PL-mount and the image sensor at an angle of about 45^ . It is part of the optical reflex viewfinder system that reflects the lens image into the optical viewfinder.

It is synchronized with the electronic shutter of the camera sensor so that the sensor is only read out in the dark phase. This completely removes rolling shutter effects of the sensor readout.

Its 180° mirrored surface reflects the lens image into the optical viewfinder. The open sector of the mirror shutter can be reduced through an electronically controlled sector gate. The mirror shutter rotates 360° for every captured frame, controlling the exposure of the sensor through its open sector. The readout of the sensor happens while the mirror reflects the light of the optical path into the optical viewfinder.

The angle of the open sector is electronically controlled via the regular camera controls.

optical viewfinder frameglow mask ground glass light from lens sensor

VIEW Phase

optical viewfinder light from lens ground glass sensor

GATE Phase

17.2.2 Lens Adapter PL Mount LA-PL-2

For a general description, please refer to page 47.

Close-up of a black mechanical camera lens mounted on a textured surface (no visible text or symbols)

Fig. 53: ALEXA Studio PL-Mount

NOTICE

Due to the optical mirror shutter, Angenieux Optimo DP zoom lenses, any Super 16 lenses, or lenses with dimensions not matching the dimensions in the figure "Allowed lens dimensions with mirror shutter" drawing cannot be used with the ALEXA Studio, as they would destroy the rotating mirror shutter!

90° φ14 max φ22 max Film Plane φ54-0.03 -0.06 2 : 1 12 max 27.5 max 31.5 max 52 +0.015

Fig. 54: Allowed lens dimensions with mirror shutter

17.2.3 Optical Viewfinder

The ALEXA SXT Studio has an optical reflex viewfinder system with interchangeable ground glasses.

It offers an exceptional viewing quality favored by a large optical design. Special care has been taken to avoid the unpleasant vignette effect that could occur by moving the eye.

NOTICE

To use the optical viewfinder, the mirror shutter must be set to On.

The viewfinder is adjustable in two axes, laterally extendable for left eye operation and shows illuminated frame lines (ARRIGLOW).

The viewfinder image stays upright and correct left-to-right when the viewfinder is swiveled within the main axis.

Close-up of a black DSLR camera with adjustable lens and adjustment knobs (no visible text or symbols)

Fig. 55: OVF top view, with mounting points marked

To extend the viewfinder arm:

1. Loosen the straight-structured ring next to the FIX engraving counter-clockwise (contrary to the arrow).
2. Adjust the horizontal position.
3. Tighten the ring clockwise (with the arrow direction).

To adjust barrel friction:

▶ Move the dot-structured ring according to the engravings LOOSE and FRICTION to loosen or tighten the friction of the OVF barrel.

Contrast Filter

To achieve a temporary subjective reduction of viewfinder contrast range, a contrast filter (density 0.6) can be pivoted into the optical beam path.

1. Use the lever next to the level bubble to pivot the contrast filter into the optical path.
2. Releasing the lever pivots the contrast filter back out of the optical path.

Ground glasses

The image created by the lens is projected to the ground glass, from where it is picked up by the optical viewfinder.

Ground glasses contain frame and format markings to show the recorded image area and the area of interest. The sensor aperture of the ALEXA SXT Studio is different from the camera aperture of ANSI and DIN Super35 formats. Therefore, Super35 ground glasses of the ARRICAM system do not provide exact frame markings in the ALEXA SXT Studio viewfinder image. For exact framing, use only ground glasses made specifically for the ALEXA SXT Studio.

To exchange a ground glass:

1. Press the VIEW button so that the sensor is protected by the mirror shutter.
2. Turn off the camera and disconnect it from power supply.

3. Remove the lens or protective cap.

4. Screw the ARRI Ground Glass Puller into the ground glass.

5. Carefully pull out the ground glass.
6. Check that the new ground glass and the ground glass holder are clean.
7. Screw the ARRI Ground Glass Puller into the new ground glass and push it into the holder.
8. Make sure the ground glass is inserted completely and correctly locked in place.
9. Unscrew the ground glass puller from the ground glass.
10. Attach a lens or a protective cap to the lens mount.

Close-up of a mechanical component with a red-handled tool inserted, showing internal components and mounting holes (no visible text or symbols)

Fig. 56: Ground glass in camera with Ground Glass Puller attached

Close-up of a red and black electrical connector with a metallic tip, isolated on white background (no text or symbols)

Fig. 57: Ground glass with attached Ground Glass Puller

To remove the field lens, which is located above the ground glass:

1. Remove the ground glass first
2. Screw the ARRI Ground Glass Puller into the field lens

3. Carefully pull out the field lens

Close-up of a mechanical component with a red screwdriver inserted into a circular opening, no visible text or symbols.

Fig. 58: Field lens in camera with attached Ground Glass Puller

Close-up of a red-handled screwdriver with a black square head and metal handle (no text or symbols visible)

Fig. 59: Field lens with attached Ground Glass Puller

NOTICE

Due to the risk of displacement caused by shock force, ARRI recommends to remove both ground glass and field lens before transportation and shipping of the camera. Whenever removing the camera from its case, check that both ground glass and field lens are properly seated before switching on the camera to prevent any damage to the mirror shutter.

FRAMEGLOW

The FRAMEGLOW module is integrated in the optical viewfinder system of the ALEXA SXT Studio. It allows illuminated format markings to be superimposed onto the viewfinder image with adjustable brightness.

▶ Press the buttons on the left side of the OVF below the DIMMER engravement to adjust the brightness of the FRAMEGLOW. At its lowest brightness setting, the FRAMEGLOW is switched off.
The FRAMEGLOW color is set in the camera menu under MENU>Monitoring>Frame lines>Frame lines color

NOTICE

When mirror shutter is switched Off, FRAMEGLOW is also deactivated to prevent stray light from hitting the sensor.

The ground glass used for the optical viewfinder should be combined with a matching frameglow mask.

To change the frameglow mask:

1. Loosen the 3mm hex socket head screw next to the level bubble.
2. Remove the level bubble element.
3. Grab the glow mask with a Hirschmann clamp at the forceps hole and pull it out of the glow mask frame.
4. Check that both the new glow mask and the glow mask frame are clean.
5. Carefully push the new glow mask into the glow mask frame.
6. Make sure the glow mask is inserted completely.
7. Place the bubble element on top of the FRAMEGLOW module and tighten the 3mm hex socket head screw.
8. Turn on the FRAMEGLOW and check that ground glass and glow mask are correctly aligned.

Close-up of a black DSLR camera with adjustment knobs and a textured grip (no visible text or symbols)

Fig. 60: Glow mask slot

Anamorphic Desqueeze

▶ Turn the wheel on top of the OVF ball element to swing the anamorphic desqueeze element into the optical path.

NOTICE

By default, the anamorphic element is for 2x anamorphic lenses. It can be changed to an element for 1.3x anamorphic lenses.

Image Flip

1. Press the button next to the image flip symbol.
2. Turn the knob next to the image flip symbol until the image is fully flipped.
3. To undo the flip, rotate the knob until the button jumps out and the knob is locked again.

Diopter Adjustment

NOTICE

Depends on the eyepiece in use. Description for default eyepiece of ALEXA SXT Studio.

1. Turn the eyepiece barrel until the ground glass is in focus.

A neutral, unstructured, bright out-of-focus image content (which can be achieved by removing the lens and pointing the camera at a bright area) helps with this.

Attaching the optical viewfinder

Upon delivery, the OVF is not connected to the camera and must be installed by the user.

1. Remove the protective cover from the OVF by loosening its 2x 3mm hex socket head screws.
2. Remove the cover plate from the camera by loosening its 2x 3mm hex socket head screws.
3. Place the OVF on the camera.
4. Take special care that the electronic connectors of camera and viewfinder are connected before pushing the OVF in place.
5. Tighten the 3x 3mm hex socket head screws of the OVF (See OVF top view image for locations of screws).

NOTICE

The torx screws on the camera that are painted red must not be tightened or loosened, as this would corrupt the alignment of the OVF.

Close-up of a black DSLR camera with attached lens and adjustment knobs (no visible text or symbols)

Fig. 61: OVF with cover plate

Close-up of a mechanical device with a black handle and mounting bracket (no visible text or symbols)

Fig. 62: Alexa Studio with cover plate

NOTICE

When recording in Open Gate mode, the image shown by the optical viewfinder is smaller than the image that is actually recorded. For exact framing, use the EVF-1 or a monitor connected to MON OUT.

Swapping the optical viewfinder for an electronic viewfinder EVF-1

1. Make sure the camera is powered down.
2. Loosen the 3x 3mm hex socket head screws of the OVF completely (See OVF top view image for locations of screws).
3. Remove the optical viewfinder.
4. Place the EVA-1 electronic viewfinder adapter plate where the optical viewfinder was.
5. Tighten the 2x 3mm hex socket head screws.
6. Attach the EVF mounting bracket with the EVF-1 to the camera housing with its 2x 3mm hex socket head screws.
7. Connect the EVF cable to the camera.
8. Power the camera.

Close-up of a mechanical device with a dome-shaped top and black casing, showing no visible text or symbols.

Fig. 63: Electronic viewfinder adapter EVA-1

Close-up of a camera lens and optical instrument component (no visible text or symbols)

Fig. 64: ALEXA Studio with mounted EVF-1

17.2.4 ND Filter

The ALEXA SXT Studio has an ND filter in front of the sensor, which can be moved in and out of the optical path. The motorized filter slider contains a ND filter with a density of 1.3 (= 4.3 stops), and a cover glass without additional density. The filter slider is sealed, so that no dirt or dust can enter the area between the slider and the sensor.

NOTICE

Perform regular dust checks on the outside of the ND filter slider, as dust might collect on top of it. As the slider is very close to the sensor, dust or dirt collecting on it might be visible as artifacts in images.

When performing a dust check, make sure the camera is switched off and disconnected from any power source to prevent the mirror shutter from activation during the cleaning process.

The ND filter can be activated in the EI screen by pushing the lower right screen button.

EXPOSURE INDEX

500 ASA 640 ASA 800 ASA 1000 ASA 1280 ASA ON ND FILTER

Fig. 65: EI screen

If activated, the ASA rating in the HOME screen will have an ND index next to it.

NOTICE

The use of the internal ND filter has no influence on the EI rating of the camera. When measuring exposure with a light meter, take into account the light loss of 4.3 stops generated by the ND filter.

17.3 Studio Camera Controls

A few additional controls are available on the ALEXA SXT Studio. These are used to control the mirror shutter and the ND filter.

The HOME screen has icons for the active ND filter and the mirror shutter position and state.

Icon Meaning
ND	ND filter is active
G	Mirror is on and parked in gate position (Grey icon if mirror shut-ter is switched off)
V	Mirror is on and parked in view position (Grey icon if mirror shut-ter is switched off)
MS	Mirror shutter is running

ND filter activation

1. On the HOME screen, press EI.
2. On the EI screen, press ND FILTER to move the ND filter in and out of the optical path.

EXPOSURE INDEX 500 ASA 640 ASA 800 ASA 1000 ASA 1280 ASA ON ND FILTER

Fig. 66: EI screen

Mirror shutter activation

1. On the HOME screen, press SHUTTER.
2. On the SHUTTER ANGLE screen, press MIRROR to activate or deactivate the mirror shutter.

DELETE SHUTTER ANGLE 45.0° 90.0° 172.8° 180.0° 270.0° Exposure time @ ON 24.000 fps: 1/50 s MIRROR

NOTICE

• When mirror shutter is active, the shutter angle is limited to 180.0 degrees. Frame rates higher than 37 fps for 4:3, 6:5, and Open Gate, and higher than 48 fps for 16:9 reduce the shutter angle range further.
• For frame rates higher than 30 fps, it is recommended to use a power source with a voltage level of 18-35 V to ensure the mirror shutter is powered sufficiently.

MIRROR PARK buttons VIEW and GATE

The camera left side Operator Controls have two additional function buttons labeled VIEW and GATE. These buttons control the parking position of the mirror shutter.

A spinning mirror shutter can be stopped by pressing either of the two buttons. Pressing the VIEW button will park the mirror in the optical path, enabling a live preview in the optical viewfinder.

Pressing the GATE button will stop the mirror shutter out of the optical path, enabling a live preview on the MON OUT and the EVF in case it is mounted to the camera. Each button is accompanied by a blue LED that lights when the mirror is parked in the respective position. When the mirror shutter is running, both of the LEDs will be active.

Pressing the GATE button while the mirror is parked in the VIEW position will move the mirror shutter by 180.0^ degrees into the GATE position.

Pressing the VIEW button while the mirror is parked in the GATE position will move the mirror shutter by 180.0^ degrees into the VIEW position.

To restart the mirror shutter, press both VIEW and GATE simultaneously.

NOTICE

After booting the camera, the mirror shutter is parked in the GATE position for safety reasons.

When stopping, the mirror shutter always opens up the electronic sector gate to 180.0^ , and closes down when it is restarted.

A live image on EVF and MON OUT is available when the mirror shutter is spinning or parked in the GATE position. A parked mirror shutter will automatically start spinning when recording is started.

When the mirror shutter is switched off, it is parked in the GATE position.

NOTICE

For safety reasons, it is required to power down the camera before performing a "gate check". Do not check or clean the sensor cover glass while the camera is powered up and the mirror is parked in the GATE position!

Frame rate and shutter angle with mirror shutter on

When the mirror shutter is switched on, the sensor frame rate is limited to 60 fps in 16:9 and 48 fps in 4:3.

Frame rates higher than 37 fps in 4:3 or 48 fps in 16:9 reduce the maximum possible mirror shutter angle. When the frame rate change reduces the allowed mirror shutter angle below the currently active shutter angle, the camera automatically sets the shutter angle to 135.0^ . The technically possible maximum shutter angle depends on the frame rate.

To set the maximum available shutter angle:

1. Press the SHUTTER button on the HOME screen to get to the SHUTTER ANGLE screen.
2. Press the ADD button on the SHUTTER ANGLE screen to get to the SHUTTER ANGLE ADD screen.
3. Press the MAX button on the SHUTTER ANGLE ADD screen and confirm by pressing the jogwheel twice.

The maximum available shutter angle is now a part of the shutter list and can be set by pressing the jogwheel.

When the mirror shutter is on, the camera redirects the user to the SHUTTER ANGLE screen after setting the sensor frame rate, where the shutter angle can be adjusted as desired. To cancel this action, press the HOME button.

3D setup

When using two ALEXA SXT Studio cameras in a 3D setup, ensure to activate both sensor sync and settings sync. Otherwise, the shutter angle on the slave camera will not match the shutter angle of the master camera.

18 Remote Control Unit RCU-4

REC FPS AUDIO SHUTTER 24.000 1 172.8 TC EXT 00:04:21@24 16:9 STBY REEL A 001 ARRIRAW BAT1 14.8V CLIP C 003 Drive BAT2 50% DUR 0:01:23 00:38:33 800 INT: RAW 3200 0 REC REC 709 EI COLOR WB HOME BACK USER MENU PLAY INFO GRAB TC LOCK WR5

The camera can be remotely controlled with an RCU-4. This device mirrors the controls on the camera's right side. It is connected to the camera's Ethernet port. Power is supplied via the Ethernet cable.

To power the RCU-4, connect it to a camera, make sure the camera is powered up, and press the power button.

During boot-up, the RCU-4 compares its firmware version with the camera firmware version. If it detects a difference, it will update itself to match the camera's firmware version. When the update is completed, the RCU-4 will shut down automatically.

The power button of the RCU-4 only affects the RCU-4. It is not possible to power or to shut down the camera with the RCU-4. When the camera is powered down, the RCU-4 shuts down automatically as it loses its power supply.

The LOCK button of the RCU-4 locks only the RCU-4. It does not affect the camera lock.

For more information, please refer to the RCU-4 user manual.

19 Index

1

12 V 41

A

About This Manual.... 9
ALEXA Studio Images.... 157
ALEXA SXT Plus.... 139
ALEXA SXT Studio.... 157
Appendix.... 175
ARRI Look File 2 files.... 78
AUDIO....72
AUDIO IN.... 40
AUDIO OUT 41
Available FSND Filter Sets.... 52

B

Basic precautions.... 52
BAT 39
BAT Connector.... 24
Bridge Plate adapter BPA-1.... 36
Bridge Plates BP-12/BP-13 35

C

Camera Controls.... 66
Camera Support.... 30
Center Camera Handle CCH-1 34
Cine-Style Batteries.... 25
COLOR....77
Condensation.... 23
Connector Pin Outs.... 177
Connectors.... 38

D

Dimensions and Weights.... 188
Disclaimer....7
Display.... 66
Display + Beeper.... 112

E

EI 75
Electronic Mirror Shutter.... 159
Electronic Viewfinder.... 99
Electronic Viewfinder EVF-1 30
ETHERNET 40
EVF 40
EVF-1 Controls.... 120
Explanation of Warning Signs and Indications.... 21
EXT 40
External Sync.... 110

F

False Color Display.... 182
False Color Index.... 104
Fan mode.... 113
Filter cleaning.... 64
Firmware - Software Update Packets (SUPs)... 115
FPS....71
Frame Lines.... 103, 131
FSND Filter Set (Basic).... 53
FSND Filter Set (Completion).... 53
FSND Filter Set (Full).... 54
Function Buttons.... 81

G

General Precautions.... 23
General Safety Guidelines.... 21
Gold Mount Batteries.... 27

H

Hand Units.... 143
HOME screen....67

I

Imaging.... 107
In-Camera Filter Module IFM-1.... 50
INFO 85
Internal recording.... 123
Internal Recording Formats.... 123
Introduction to the ALEXA SXT Camera System 11

L

Layout of the ALEXA.... 19
Lens Adapter PL Mount LA-PL-2.... 159
Lens Adapter PL-Mount LA-PL-2 47
Lens Data Display LDD-FP.... 144
Lens Motors.... 142
Lens Mounting.... 47
Lens Support.... 48
Levelling Block LB-1.... 36
Lists and User Lists.... 70

M

Main Controls.... 66
Mains Unit NG 12/26 R.... 25
Maximum lens mounting depth.... 51
Menu 94
Minimum Equipment Recommended For
Operation.... 30
Monitoring....97,131
MON OUT 1/2/3.... 40, 101
Mounting in-camera filters.... 61

N

ND Filter 167
Network.... 114

0

Onboard Batteries.... 26
Operation of the Camera.... 123
Operator controls.... 119
Optical Viewfinder.... 161
Optics.... 159

P

PLAY 91
Plus Camera Controls.... 144
Power....110
Powering 12 V Accessories.... 28
Powering 24 V Accessories.... 29
Power Management.... 24
Power Outputs.... 28
Power Supply.... 24
Production Info.... 106
Project.... 105

R

Radio System.... 140
Recording.... 94
Recording Module.... 43, 123
Remote Control Unit RCU-4 172
Required shimming and maximum lens mounting
depth 52
RET SYNC IN.... 39
RS....41

\$

Safety Guidelines.... 21

Safety instructions for in-camera filtration.... 51

Scope.... 10

Screen Buttons....67

SD Card.... 41, 114

Shimming the lens mount 55

Shoulder Pad SP-3.... 37

SHUTTER 75

Side Camera Handle SCH-1 35

Specific Safety Instructions.... 21

Status Info Overlays 132

Storage and Transport.... 23

Studio Camera Controls.... 168

Syncing the Sensors of Two Cameras.... 135

Syncing the Settings of Two Cameras.... 137

System 107

System Time + Date.... 112

T

TC 41,83

Technical data.... 175

Test Signal.... 111

TIMECODE OPTIONS 83

Tripod and Remote Heads.... 30

U

USER 88

USER BITS 84

User Pixel Masking.... 108

User Setups.... 117

Using Timecode.... 134

V

Viewfinder Cables.... 31

Viewfinder CAM menu.... 122

Viewfinder EVF menu.... 120

Viewfinder Mounting Bracket.... 32

V-Lock Batteries 26

W

Warning and Error Messages.... 183

WB 80

Web Remote.... 122

Wedge Adapter WA-1 and Quick-Release Plate

QR-HD-1 36

Wireless Remote System.... 141

20 Appendix

20.1 Technical data

Image Sensor

Type ALEV III CMOS sensor

Sensor frame rates 0.750 - 120.000 fps

Shutter angle 5.0° - 358.0°

Total active photo sites (incl. surround view)	3168 x 1782 (16:9)
	3168 x 2198 (6:5)
	3168 x 2198 (4:3)
	3424 x 2202 (Open Gate)

Photo sites of recorded image 2880 x 1620 (16:9)

2578 x 2160 (6:5)

2880 x 2160 (4:3)

3424 x 2202 (Open Gate)

Image aperture (incl. surround view) 26.14 x 14.70 mm (16:9)

26.14 x 17.82 mm (6:5)

26.14 x 17.82 mm (4:3)

28.17 x 18.13 mm (Open Gate)

Aperture of recorded image 23.76 x 13.37 mm (16:9)

21.27 x 17.82 mm (6:5)

23.76 x 17.82 mm (4:3)

28.17 x 18.13 mm (Open Gate)

Photo site pitch 8.25 μm

Aspect ratios 1.78:1 (16:9)
	1.2:1 (6:5)
	1.33:1 (4:3)
	1.55:1 (Open Gate)

Filters optical low pass, UV, IR

Color filters RGB primary colors

Lens

Lens mount Exchangeable lens mount, with PL mount LA-PL-2 installed

Flange focal depth 52.00 mm nominal

Image processing

White balance 2000 - 11000 Kelvin

CC Shift -12 to +12

EI rating 160 - 3200 ASA

Recorded image resolutions (pixels) 1920 x 1080 (16:9 HD)

2048 x 1152 (16:9 2K)

3200 x 1800 (16:9 3.2K)

3840 x 2160 (16:9 4K UHD)

2880 x 1620 (16:9 ARRIRAW)

3168 x 1782 (16:9 ARRIRAW)

2048 x 858 (6:5 2K Anamorphic)

4096 x 1716 (6:5 4K Cine Anamorphic)

2578 x 2160 (6:5 ARRIRAW)

2880 x 2160 (4:3 2.8K)

3424 x 2202 (Open Gate 3.4K ProRes)

4096 x 2636 (Open Gate 4K Cine)

3424 x 2202 (Open Gate ARRIRAW)

Viewfinder

Type ARRI EVF-1

Technology LCOS imaging device

Resolution 1280 x 784 pixels

Power

Power supply DC 10.5 - 34V

Power management Active ORing between BAT connector

and onboard battery adapters

Power consumption ca. 85W w/o accessories

Power outputs 2 x RS (24V), 1x 12V

Recording

Recording media SXR Capture Drives

XR Capture Drives

Sony SxS PRO and SxS PRO+ cards

CFast 2.0 cards

Recording formats Apple ProRes 422/4444 codec family

ARRIRAW

Image Outputs

Monitoring outputs EVF out: proprietary signal for EVF-1

with delay <1 frame

3x MON OUT:

422 1.5G @ frame rates:

23.976, 24, 25, 29.97 and 30 fps

Timecode

Type Tunable TC clock generator with crys-

tal oscillator

TC input LTC in

TC outputs LTC out

HD-SDI LTC/VITC out

Others

SD card most SD cards with FAT/FAT32 up to 4

GB

Sound level under 20 dB(A) @ 24 fps and ambient

temperature < 25° C / 77° F

Environmental -20° C to +45° C @ 95% relative hu-

midity max, non condensing

HD video transmitter (ALEXA SXT W only)

Power consumption 7W

Output resolution 1920 x 1080

Frame rates p: 23.98, 24, 25, 29.97, 30

psF: 23.98, 24, 25, 29.97, 30

Audio 2 channels, 48KHz PCM

embedded in HD-SDI signal

Transmission range 600m (2,000 ft) line of sight

Latency < 1ms

Encryption 128bit AES

Modulation process and other specifics OFDM (Orthogonal Frequency-Division

Multiplexing)

Bandwidth 40MHz

WiFi module (ALEXA SXT W only)

IEEE 802.11b: 1/2/5.5/11 Mbit/s Modulation DSSS, Bandwidth: 22 MHz

IEEE 802.11g: 6/9/12/18/24/36/48/54

Modulation OFDM, Bandwidth: 20 MHz

Mbit/s

Dimensions and weight

For dimensions and weight, please refer to the dimensional drawings.

20.2 Connector Pin Outs

NOTICE

The drawings of the connectors are not to scale.

All pin-outs for camera interfaces appear as seen by the user.

BAT

Simple diagram with three black circles labeled 1, 2, and 3 inside a large circle, no text or symbols present.

1 GND
2 +24V
3 BAT-COM

RS

1 2 3

1 GND
2 24V-AUX
3 R/S

12V

1 2

1 GND
2 12V-AUX

TC

1 2 5 3 4

1 GND
2 LTC IN
3 ASCII
4 TUNE OUT
5 LTC OUT

EXT

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

1 RS422-TXD(+)
2 RS232-TXD
3 CAN1-L
4 CAN1-H
5 CAN2-L
6 CAN2-H
7 24V-AUX
8 RS232-RXD
9 RS422-RXD(-)
10 RS422-RXD(+)
11 RS422-TXD(-)
12 GND
13 TTL-IN1
14 TTL-IN2
15 24V-AUX
16 GND

ETHERNET Camera Side

1 8 2 9 7 3 10 6 4 5

1 MX-1P CTS (white-orange)

2 MX-1N DTR (orange)

3 MX-2P GND (white-green)

4 MX-2N DCD (green)

5 MX-3P TXD (blue)

6 MX-3N RXD (white-blue)

7 MX-4P DSR (white-brown)

8 MX-4N RTS (brown)

9 GND

10 24V-ETH

ETHERNET PC Side

RTS DSR DCD RXD TXD GND DTR CTS 1 2 3 4 5 6 7 8 RJ-45

RTS brown

DSR white-brown

DCD green

RXD white-blue

TXD blue

GND white-green

DTR orange

CTS white-orange

AUDIO IN

4 5 3 2 1 PUSH

1 AGND
2 L-IN(+)
3 L-IN(-)
4 R-IN(+)
5 R-IN(-)

AUDIO OUT 3 TIP 2 RING 1 GND

1 GND

2 R-OUT

3 L-OUT

20.3 False Color Display

The false color display is a tool to check correct exposure. It can be activated on EVF and MON OUT, and takes the respective gamma setting as a basis for calculation. When active, the image is turned into a greyscale image with important luminance ranges shown in signal colors. Note that the false color tool is only suitable for checking exposure and is not an appropriate tool for checking other image parameters or sensor quality.

Color Encoding

Six different colors are used to show the important luminance ranges.

What	Signal Level	Color
White clipping	100% - 99%	red
Just below white clipping	99% - 97%	Yellow
One stop over medium gray (Caucasian skin)	56% - 52%	pink
18% medium gray	42% - 38%	green
Just above black clipping	4.0% - 2.5%	blue
Black clipping	2.5% - 0.0%	purple

Fig. 67: False Color Encoding

The following example illustrates the behavior of the false color display.

Night street scene with illuminated buildings and streetlights, no visible text or signage

Fig. 68: Night scene captured with ALEXA

Night street scene with illuminated buildings and streetlights, no visible text or signage

Fig. 69: Night scene with false color active

20.4 Warning and Error Messages

If anything unwanted occurs in the camera, it will give a message to the user.

These states, which require attention from the user, are indicated by icons in the main display, the viewfinder and the MON OUT.

Warnings inform the user that a state has changed or that an error is likely to occur, but recording is still possible.

When the camera goes into error state, recording is no longer possible, as it cannot be guaranteed that images are acquired as the user intended, or it is not possible for the camera to record.

The messages give a compact description of what has happened. If more information is required, please refer to the following tables.

Special warnings and errors: Sensor temperature

ALEXA has a Peltier element that keeps the image sensor at a stable temperature. This is important to achieve constant image quality. In certain situations, the camera might not be able to keep the optimal temperature, or it might take some time to reach the optimal temperature. This may be the case directly after booting, or in very hot or cold environments.

A red temperature icon indicates that the sensor temperature is too far off to guarantee a high image quality. A white temperature icon indicates that the sensor temperature is not optimal, but image quality is still within the (very high) quality limits required by ARRI.

The related messages in the INFO screen are shown in the following tables.

Status message

System state: Good Camera works properly.

Warning messages and meanings

Main Bat: Power warning The battery attached to the BAT connector has reached its warning level. Battery power is about to end, and a replacement battery should be prepared.

Onboard Bat: Power warning The battery attached to the onboard battery adapter has reached its warning level. Battery power is about to end, and a replacement battery should be prepared.

Media: Low capacity The recording	medium has less than 3 minutes recording time left. Prepare a new card for recording.
Media: Prerec space low The prerec	recording duration nearly fills the re-maining recording time on the recording medi-um. Prepare a new card for recording.
Media: Rec. inhibited The recording	medium is protected. Remove the card from the camera, slide the switch lo-cated on the camera back end to the Rec enable position and re-insert the card.
Media full The recording medium is full.
Media: Wrong file system The rec	ding medium is not formatted in the file system required by the camera. Format the medium.
Media too slow The write speed of	recording medium is insufficient for the sensor fps set on the camera. Use a medium with a higher write speed.
Media: files not consistent The met	adata of one or more files on the recording media are not consistent. Backup any data on the medium and format the medium.
Media type not supported The me	dia type of the current medium is not supported.
Media write problem The camera	has problems writing to the record-ing medium. Continue with a fresh medium.
Media: wrong recording mode. May contain clips	XR Capture Drive is formatted for ARRIRAW, but ALEXA is in ProRes recording mode, or vice-versa. Format the media to record on it.
Camera overheating The camera	system's temperature is reaching a critical level. This can either be due to a blocked camera fan or ambient temperature exceeding the system's limits. Apply additional cooling or switch off the camera to prevent hardware damage.
Low sensor temperature The sensor	temperature is lower than it should be. High image quality is still guaranteed.
High sensor temperature The sensor	temperature is higher than it should be. High image quality is still guaranteed.
Ext TC: Different frame rate The ex	external TC signal's time base differs from the project fps of the camera. Syncing is still possible.
Re-jam timecode soon. Accuracy	of jammed Timecode can soon ex-pire. Re-jam camera with external Timecode soon.
Re-jam timecode now. Accuracy of jammed Timecode has expired.Re-jam camera with external Timecode.
TC source forced to internal Sensor fps does not match Project fps. External Free Run TC cannot be used, camera has switched to Int Rec Run TC.
TC mode forced to Rec Run Sensor fps does not match Project fps. External Free Run TC cannot be used, camera has switched to Int Rec Run TC.
Interface bit error. Check image.	Reboot camera. If error continues to occur, contact ARRI service.
Internal processing problem Reboot camera. If error continues to occur, contact ARRI service.
Internal battery error The internal battery which powers the real-time clock must be replaced. Contact an ARRI service center near you.
System problem Reboot the camera. If error continues to occur, contact ARRI service.
System problem (I2C bus error)	Problem on camera data bus. Reboot the camera. If error continues to occur, contact ARRI service.
External TC: Incompatible frame rate	The external TC signal's time base is not accepted by the camera.
HD outs not synced. Trigger now.	Appears on slave cam with Ext sync activated, but not using settings sync. Send trigger from Ext sync master camera to ensure the MON OUTs of both cameras are in sync.
Connect with Ethernet slave. Camera is set to Settings sync: ETH master, but is not connected with slave camera via Ethernet
Connect with Ethernet master. Camera is set to Settings sync: ETH slave, but is not connected with master camera via Ethernet
External TC: Jamming. Please wait.	Camera jams to external TC signal. Do not disconnect TC source from camera until warning disappears.
External TC: Signal missing Camera is set to Ext LTC regen, but external TC signal is missing.
External TC: Incompatible frame rate	The external TC signal has a time base that does not match the project fps of the camera.
Framegrab: Grabbing image failed	A problem occurred in the camera. The frame grab failed.
Framegrab: Storing image failed	A problem occurred with the SD card. The frame grab failed.
Playback failed The camera could	not play back the internally recorded clips.
EVF smooth mode not possible	Smooth mode is set to "On", but either sensor fps is higher than 30.000, or shutter angle is higher than 180.0
Ext LTC: Forced to JAM sync Ext	LTC had to be switched to Jam sync by camera system.
Card/Media removed, play-back failed	Camera had to abort playback, as media was removed.
Calibrate lens motors. New lens m	motors are attached to the camera.Prior to use they must be calibrated.
Temperature at limit. Fan RPM raised	Although camera fan is in "Rec low" mode, fan noise might exceed silent level because cam-era is becoming too hot.
Master/slave: Focus unit mis-match	With ALEXA SXT Plus and 3D lens sync, both cameras must have same focus unit activated, which is not the case here.
Slave: No lens table active. With A	ALEXA SXT Plus and 3D lens sync, select lens table on slave when using LDA.
Sensor in High Humidity mode Reminder for active High Humidity mode
ND filter stuck ALEXA SXT Studio	only.ND filter slider has mechanical problems.
Mirror sector problem ALEXA SXT	Studio only.Mirror sector has mechanical problems.
Mirror cannot reach sync speed	ALEXA SXT Studio only.Mirror cannot reach speed due to technical problems.
Voltage too low for mirror ALEXA	SXT Studio only.Power supply voltage level insufficient to drive mirror shutter.
Mirror out of phase ALEXA SXT	Studio only.Mirror shutter and sensor are out of phase, may result in exposure artifacts.
Mirror failure. Press GATE or VIEW.	ALEXA SXT Studio only.Mirror shutter initialization failed, press GATE or VIEW to reset mirror shutter manually.
Some buttons are defect Camera	button signals are failing. Reboot cam-era. If reappearing after reboot, contact service for button replacement. Mostly hardware problem.
Media: Data rate low. Check last clip.	Data rate of last recorded clip is very low. Check for artifacts in replay. Can also occur when forgetting to remove lens cap during recording.
LDS failure. Reboot. The lens data	system has failed. Restart the camera if LDS is used.

Error messages and meanings

Main Bat: Low power The battery	attached to the BAT connector has reached its low level (10% below warning level). Battery must be replaced.
Onboard Bat: Low power The onboard battery has reached its low level (10% below warning level). Battery must be replaced.
All Bats: Low power Batteries on both BAT connector and onboard battery(s) have to be replaced.
Media end of lifetime The recording medium has reached the end of its life cycle and has become read-only. Use a new medium.
Media: Write speed error The current write speed could not be handled by the recording medium.
Camera overheating The camera is getting too warm. Apply additional cooling or shut down to prevent hardware damage.
Low sensor temperature Sensor temperature is out of range. Wait until error message disappears before continuing to shoot.
High sensor temperature Sensor temperature is out of range. Wait until error message disappears before continuing to shoot.
System error Reboot the camera.
Codec error. Reboot. An error in the compression module has occurred, and recording was aborted. Reboot the camera.
Sensor error. Reboot. The image sensor has a problem. Reboot the camera.
Sensor boot error The sensor has not booted. Reboot the camera.
Interface error. Reboot. An internal data interface has a problem. If re-booting does not solve the problem, contact the ARRI service.
Fan error. Contact service. The fan module is not working properly. Either install an SFM-1, or contact the ARRI service.
Fatal system error. Shut down camera.	Camera has to be rebooted. If this error continues to occur, a hardware problem might be the reason. Contact the ARRI service.
Sync clock out of range. The sync signal clock does not match the camera setting. Make sure the settings match.
Syncing sensor Slave camera syncs to master camera. Wait until message disappears before starting to record.
Synced camera is not ready One of the slave cameras is not ready for recording.
Software error. Reboot. A part of the camera software has stopped functioning properly and requires a camera reboot.
Internal audio recording failed Audio recording on internal medium failed.
REC error. Reboot. Error in the recording module. Reboot camera.
Mirror shutter not calibrated ALEXA SXT Studio only.Mirror shutter must be calibrated by ARRI service.
Mirror shutter phase error ALEXA SXT Studio only.Mirror shutter continuously not in phase with sensor. If rebooting does not solve the problem, contact ARRI service.
Mirror shutter: Cannot reach sync speed	ALEXA SXT Studio only.Mirror shutter continuously not reaching sync speed. If rebooting does not solve the problem, contact ARRI service.

If any error that requires rebooting occurs repeatedly, contact the ARRI service.

20.5 Dimensions and Weights

Dimensional drawings including weights information are attached to the end of this document. A version with higher resolution can be downloaded from the ARRI website: http://www.arri.com/camera/alexa/downloads/.

20.6 Declarations of Conformity

Note: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

EU Declaration of Conformity

The product ALEXA SXT EV conforms to the specifications of the following European directives:

• DIRECTIVE 2011/65/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (recast)
• DIRECTIVE 2014/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility

The products ALEXA SXT Plus, ALEXA SXT Studio, and ALEXA SXT W conform to the specifications of the following European directives:

• DIRECTIVE 2011/65/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (recast)
• DIRECTIVE 2014/53/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 16 April 2014 on the harmonization of the laws of the Member States relating to the making available on the market of radio equipment

The compliance with the requirements of the European Directives was proved by the application of the following harmonized standards:

• EN 62368-1:2014/AC2015;
• EN 301 489-1 V2.1.1; EN 301 489-17 V3.1.1; EN 55032:2015, EN 55103-2:2009
EN 301 893 V1.8.1
EN 50581:2012

To evaluate the respective information we used:

http://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/index_en.htm

Munich, 01 August 2017

sign Walter Trauninger Managing Director

sign Dr. Sebastian Lange Head of Quality Management

FCC Compliance Statement

Class A Statement: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

Note: This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

• ECS transceiver module*: FCC ID: Y7N-EMIP300
• Wireless video module**: FCC ID: Y7N-AVTS35253
• WiFi module**: FCC ID: PVH0965

Industry Canada Compliance Statement

Complies with the Canadian ICES-003 Class A specifications.

This device complies with RSS-210 of Industry Canada.

This Class A device meets all the requirements of the Canadian interference-causing equipment regulations

CMIIT ID: 2017AJ4701 (M)

…的无线电发射模块。

- WiFi module**:

本设备包含型号核准代码（分别）为：

CMIIT ID: 2017DJ4549 (M)

…的无线电发射模块。

• ALEXA SXT W:

本设备包含型号核准代码（分别）为：

CMIIT ID: 2017AJ5636

…的无线电发射模块。

Singapore

• ALEXA SXT W: Dealer's License No: DA103787

Complies with

IMDA Standards

DA103787

Japan

• ECS transceiver module*: MIC-ID: 011-150023
• WiFi module**: MIC-ID: 204-510009
• Wireless video module**: MIC-ID: 001-A03519

South Korea

Statements for 2.4 GHz Devices: "해당무선설비는 운용 중 전파 혼신 가능성이 있음." Translation for reference only: This radio device has the possibility of radio interference.

• ECS transceiver module*: Certification No: MSIP-CRM-Arg-EMIP300
• WiFi module**: Certification No: MSIP-CRM-ULX-ODIN-W260
- Wireless video module**: Certification No: MSIP-CRM-ARg-AVTS35253
ALEXA SXT W: Certification No: MSIP-REM-ARg-ALEXA-SXT-W

United Arab Emirates

The low-power radio-frequency devices must not be altered by changing the frequency, enhancing emission power, adding external antenna, and modification of original design characteristic as well as function.

警語二

The operation of the low-power radio-frequency devices is subject to the conditions that no harmful interference is caused. The user must stop operating the device immediately should harmful interference is caused and shall not resume until the condition causing the harmful interference has been corrected.

Moreover, the interference must be accepted that may be caused by the operation of an authorized communications, or ISM equipment.

警語三

5250MHz-5350MHz is allowed to use for indoor only.

South Africa

ICASA

TA-2017/1397

APPROVED

* ALEXA SXT Plus, ALEXA SXT W, and ALEXA SXT Studio only

** ALEXA SXT W only

ALEXA SXT EV

Length

Width

Height

Weight

Body 321 mm - 12.64" 166 mm - 6.54" 157.8 mm - 6.21" 6.5 kg - 14.3 lb

Body, Camera Center Handle (CCH-1),

Electronic Viewfinder EVF-1, EVF-1 cable KC-150-S,

Viewfinder Mounting Bracket (VMB-3)

384 mm - 15.12" 251 mm - 9.88" 224 mm - 8.82" 8.0 kg - 17.6 lb

Camera Left Image Plane 142 mm max. 5.50" 120 mm 4.72" UNC 3/8 - 16 (10 mm deep) UNC 3/8 - 16 (10 mm deep) 17.6 mm 0.7" 10 mm 0.38" M5 (3.5 mm deep) ARRI 126.6 mm 5.97"

Camera Back Optical Center 80 mm 3.39" 83.5 mm 2.29" 171 mm 6.73" 40 mm 3.15" UNC 368°-16 (10 mm deep) 224 mm 8.5" M0 (6 mm deep) 210.8 mm 0.42" 64.9 mm 2.50" 69.8 mm 2.75"

Camera Top Image Plane 230 mm 9.85" 31/20 1/4" 20/20 1/4" 15/20 25/20" 120 mm 60K 83.5 mm 3.28" 75 mm 2.45" 37.5 mm 1.69" 60.8 mm 2.1" 97 mm 2.04" 95 mm 3.78" 17.22 mm 4.74" 238 mm/10mm 0.41" max" Optical Center Camera Bottom Image Plane cosi hole 7 mm (=0.022) wide and 8 mm (long 4.5 mm deep) UNC 3/8 = 18 (10 mm deep) 60 cm 3.99" 80 mm 3.10" 120 mm 4.72" 198 mm 7.79"

Camera Top Image Plane M4 (4 mm disp) 67 mm 2.64" Optical Center Camera Top 30 mm 2.64" 100 mm 6.54" 20 mm 1.50" 15 mm 2.50" 25 mm 3.50" 35 mm 4.50" 45 mm 5.50" 60 mm 7.50" 80 mm 9.50" 100 mm 11.50" 120 mm 130 mm 140 mm 150 mm 160 mm 170 mm 180 mm 190 mm 200 mm 210 mm

ALEXA SXT Plus

Length

Width

Height

Weight

Body 321 mm - 12.64" 189 mm - 7.44" 157.8 mm - 6.21" 6.9 kg - 14.3 lb

Body, Camera Center Handle (CCH-1),

Electronic Viewfinder EVF-1, EVF-1 cable KC-150-S,

Viewfinder Mounting Bracket (VMB-3)

384 mm - 15.12" 251 mm - 9.88" 224 mm - 8.82" 8.4 kg - 18.6 lb

Camera Left Image Plane 142 mm max. 0.58" 120 mm 4.72" UNC 3/8" - 16 (10 mm deep) UNC 3/8" - 16 (10 mm deep) 17.5 mm 0.7" M8 (3.5 mm deep) 10 mm 0.38" ARRI 128.8 mm 5.07"

Camera Back Optical Center 86 mm 2.30" 174 mm 9.73" UNC 3/8"-16 (10 mm deep) 102.8 mm 4.05" 93.6 mm 3.20" 80 mm 3.15" 225.8 mm 9.51" MO (8 mm deep) 64.3 mm 2.56" 60.8 mm 2.75" 2+3.6 mm 8.42"

Camera Top Image Plane 230 mm 9.05" 40.7 mm 1.6" 35.1 mm 75.2 mm 75.4 mm 75.8 mm 12.1 mm (0.90) 95.5 mm 3.24" 75.5 mm 1.48" 50.8 mm 2.74" 87 mm 2.04" 80 mm 3.78" 77.22 mm 0.74" Optical Center Camera Bottom Image Plane oval hole 7 mm (+0.02) wide and 8 mm long (4.5 mm deep) LNG 30°-18 110 mm deep 100 mm 3.26" 130 mm 4.35" 120 mm 4.72" 139 mm 7.70"

Camera Right Image Plane UNC 3/8"-16 (10 mm occp) 234 mm 10.4" 76.2 mm 3" 58.4 mm 2.34" 120.3 mm 4.74" 65 mm 2.6" 157.8 mm 8.21" 158.6 mm 5.07" 100 (3.5mm occp) 40 mm 1.58" 17.6 mm 0.7" ARRI

Camera Front Optical Center 102.8 mm 4.05" 171.2 mm 6.74" UNC 3/8"-16 (13 mm deep) Optical Center ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 15 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø 20 mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm ø20mm

ALEXA SXT W

Length

Width

Height

Weight

Body 351 mm - 13.82" 189 mm - 7.44" 157.8 mm - 6.21" 7.4 kg - 16.3 lb

Body, Camera Center Handle (CCH-1),

Electronic Viewfinder EVF-1, EVF-1 cable KC-150-S,

Viewfinder Mounting Bracket (VMB-3)

414 mm - 16.3" 251 mm - 9.88" 224 mm - 8.82" 8.9 kg - 19.6 lb

Camera Left Image Plane Camera Back Optical Center 142 mm max. 6.50" 126 mm 4.72" UNC 3/8"-16 (10 mm deep) UNC 3/8"-16 (10 mm deep) 17.5 mm 0.7" M6 (3.5 mm deep) 10 mm 6.35" L20.8 mm 5.07"

102.8 mm 4.05" 83.5 mm 3.29" 90 mm 3.15" 66 mm 3.36" 171 mm 6.73" UNC 3/9 - 16 (10 mm deep) 223.8 mm 8.81" M3 (6 mm deep) 64.9 mm 2.58" 69.9 mm 2.75" 273.8 mm 8.12"

Camera Top Image Plane Image Plane Camera Bottom 230 mm 9.05" 45.7 mm 1.8" 2.4 mm 2.4 mm 2.4 mm 2.4 mm 15 mm 5 mm 33.5 mm 2.25" 37.5 mm 1.45" 60.6 mm 2" 37 mm 2.54" 95 mm 3.39" 177.22 mm 5.74" UNC 3/8 - 16 (10 mm desc)

oval hold 7 mm (+0.022) wide and 8 mm long (4.5 mm deep) UNC-3W~1E (10 mm deep) 120 mm 4.72" 120 mm 2.46" 2.5 mm 4.98" 190 mm 7.78" 95 mm 3.39" 102 mm 4.88"

Camera Top Image Plane Camera Top M4 (4.7 mm deep) Optical Center 10.70 12.50 87 mm 2.54 69 mm 3.39 100 mm 1.44 20.70 0.70 8.50 mm 1.02 20.70 2.11 30.41 mm 3.7 34.00 2.22 82.60 mm 2.51 20.11 mm 2.02

Camera Right Image Plane UNC 3/8-16 (10 mm deep) 256 mm 10.43" 76.2 mm 3" 59.4 mm 2.34" 138 mm 5.43" 3.4" 36 mm 2.6" 150 mm 0.42" ARRI ARRI 104 mm 0.28" 10 mm 0.39" 50 mm 1.87" 22.8 mm 0.9" M6 (3.5mm deep) Camera Front Optical Center 206 mm 8.11" 112 mm 4.41" 156 mm 6.14" Optical Center 105 mm 4.53"

ALEXA SXT Studio

	Length	Width	Height	Weight
Body 364 mm - 14.33" 189 mm - 7.44" 163 mm - 6.42" 8.2 kg - 18.1 lb
Body, Camera Center Handle (CCH-1), Optical Viewfinder OVF-1	402 mm - 15.9"	268 mm - 10.55"	241 mm - 9.49"	10.3 kg - 22.8 lb
Body, Camera Center Handle (CCH-1), Electronic Viewfinder EVF-1, EVF-1 cable KC-150-S, Viewfinder Mounting Bracket (VMB-3)	402 mm - 15.9" 268 mm - 10.55"	241 mm - 9.49"	9.8 kg - 21.7 lb

Camera Left Image Plane 138 mm 5.43° UNC 328°-16 (10 mm deep) ALEX® ARRI 134 mm 5.28" 22.8 mm 0.9° MS (3.5 mm deep) 10 mm 0.38°

Camera Back Optical Center UNC 308°-16 (10 mm deep) MNC 308°-16 (10 mm deep) 156 mm 6.14" 112 mm 4.41" 229 mm 9.72" M3 (6 mm deep) 218 mm 8.62" 64.9 mm 2.56" 71.9 mm 2.83"

Camera Top Image Plane 230 mm 5.05 16.7 mm 4.0" 25.4 mm 25.4 mm 25.4 mm 67 mm 2.84" 159 mm 6.14" UNC 3/8" - 18 (10 mm deep) Camera Bottom Image Plane UNC 3/8" - 18 (10 mm deep) Optical Center 16 mm 0.62" 12 mm 2.04" 42 mm 1.00" 10 mm 2.04" 25 mm 3.00" 30mm 0.22"