ET-ELW20 - Projector Accessories PANASONIC - Free user manual and instructions

Product Type	Projector Lens Accessory
Model Number	ET-ELW20
Lens Type	Zoom Lens
Focal Length	20.4 - 27.6 mm
F Value	1.8 - 2.3
Dimensions (W x H x D)	116 x 116 x 196 mm (4-9/16 x 4-9/16 x 7-23/32 in)
Net Weight	1.20 kg (2.65 lbs)
Supported Projectors	PT-MZ770/MW730/MZ670/MW630/MZ570/MW530, PT-EZ770/EW730/EX800
Supplied Accessories	Lens cover (front and rear), Spacers (4 pcs, colors: black, cream, clear)
Lens Shift Range	Adjustable within defined ranges; refer to manual for specific limits
Focus Correction	Using supplied spacers; correction distance depends on spacer thickness and image size
Safety Warnings	Do not look into lens while projector is on; turn off power before lens replacement; keep spacers away from children
Cleaning	Use clean, soft, dry cloth; avoid fluffy or oily cloths; do not apply excessive pressure
Storage	Store away from vibration or impacts after removal
Compliance	EU disposal regulations apply; product contains glass lens

Frequently Asked Questions - ET-ELW20 PANASONIC

What is the Panasonic ET-ELW20 lens used for?

The ET-ELW20 is a zoom lens designed for use with select Panasonic projectors (e.g., PT-MZ770 series) to adjust projection size and focus. It is a short zoom lens with a focal length range of 20.4-27.6 mm.

How do I attach or remove the ET-ELW20 lens?

Always turn off the projector and disconnect the power plug before attaching or removing the lens. Ensure the lens is at the home position. Refer to the projector’s operating instructions for detailed steps. After removal, store the lens safely away from vibration.

How can I correct peripheral focus issues with this lens?

Use the supplied spacers (clear, black, cream) to correct focus unevenness. Insert spacers between the projector body and lens mounter at positions corresponding to unfocused areas. The correction distance depends on spacer thickness and projected image size (SD). For example, a 0.1 mm clear spacer at 1.52 m image size corrects 120 mm.

What is the lens shift range for the ET-ELW20?

The lens shift range varies by projector model. For PT-MZ770 series, shift is within defined vertical and horizontal limits. Perform shift adjustment only within the ranges shown in the manual to avoid focus changes. The home position is set during lens calibration.

How do I clean the ET-ELW20 lens?

Use a clean, soft, dry cloth to gently wipe away dust. Do not use fluffy or oily cloths, and avoid applying excessive pressure. Do not touch the lens surface with bare hands; fingerprints will degrade image quality.

What are the safety warnings for using the ET-ELW20?

Never look directly into the lens or place skin in the light beam while the projector is on—it can cause burns or vision loss. Always turn off the projector before lens replacement. Keep spacers away from children (choking hazard). Do not project with the lens cover attached.

Which projector models are compatible with the ET-ELW20?

Compatible projectors include PT-MZ770, PT-MW730, PT-MZ670, PT-MW630, PT-MZ570, PT-MW530, PT-EZ770, PT-EW730, and PT-EX800. Some alphabets at the end of model numbers are omitted; refer to the projector manual for full compatibility.

What are the dimensions and weight of the ET-ELW20 lens?

Dimensions: 116 mm (width) x 116 mm (height) x 196 mm (depth), excluding protrusions. Net weight: 1.20 kg (2.65 lbs).

Can the ET-ELW20 be used with third-party projectors?

The lens is specifically designed for Panasonic projectors listed in the manual. Using it with other projectors may cause fitment issues or damage. Always verify compatibility with your projector’s operating instructions.

What should I do if the lens is not focusing evenly?

First, ensure the lens is properly attached and at the home position. Then, check if focus correction is needed using spacers. If uneven focus persists, consult a qualified service technician, as focus adjustment requires technical skill.

USER MANUAL ET-ELW20 PANASONIC

Operating Instructions

Projection Lens

Commercial Use

Model No.

ET-ELW21

ET-ELW20

ET-ELT22

ET-ELT23

ET-ELW21

ET-ELW20

ET-ELT22

ET-ELT23

ENGLISH

Read before use

This document is intended for the various projection lenses that can be attached to and used in conjunction with Panasonic projectors.

For Model No. and model names, refer to the product list (→ Page 4).

Thank you for purchasing this Panasonic product.

■ To ensure correct use of this lens, please read the operating instructions supplied with the lens and the projector carefully. Before using this product, be sure to read "Read this first!" (→Page 3). - Please save this manual for future use.

Contents

Read this first! ....3

Before Use....4

Attaching / removing the projection lens....4

Before replacing the projection lens....4

Attaching the Lens / Detaching the Lens.... 5

Making Adjustments ....5

Correcting the Focus....5

Projection relationships....7

Lens shift ranges....8

Specifications ....10

Dimensions....10

Projected image size and Projection distance.....Appendix / Annexe / 付録 1

The "Appendix" can be found after the Japanese language section (日本語).

WARNING:

Do not look at or place your skin into the light emitted from the lens while the projector is being used.

Doing so can cause burns or loss of sight.

- Strong light is emitted from the projector's lens. Do not look at or place your hands directly into this light.

● Turn off the power when moving away from the projection lens or projector.

Do not project an image with the lens cover attached.

- Doing so can cause fire.

Do not allow children to reach the spacer.

● The spacers can cause personal injury if swallowed.

- If the spacers are swallowed, seek medical advice immediately.

CAUTION:

Before replacing the projection lens, be sure to turn off the power and disconnect the power plug from the wall outlet.

● Unexpected projection of light may cause injury to eyes. ● Replacing the projection lens without removing the power plug may result in electric shock.

Do not stand in front of the lens while the projector is being used.

Doing so can cause damage and burns to clothing.

- Strong light is emitted from the projector's lens.

Do not place objects in front of the lens while the projector is being used.

Doing so can cause fire, damage to the object, or malfunction of the lens and projector.

- Strong light is emitted from the projector's lens.

Do not open the desiccant bag. Do not eat the contents.

Inadvertently ingesting desiccant could be harmful.

- If the desiccant gets into your eyes or mouth, immediately rinse with plenty of water and seek medical attention.

- Keep desiccant out of the reach of children.

Before Use

Product list

The product names and model numbers of the projection lenses covered by this manual are as follows.

Product name Model number

Fixed focus lens ET-ELW21

Zoom lens ET-ELW20 / ET-ELT22 / ET-ELT23

■ Supported projectors

PT-MZ770 / PT-MW730 / PT-MZ670 / PT-MW630 / PT-MZ570 / PT-MW530 / PT-EZ770 / PT-EW730 / PT-EX800

Note

● This manual omits the alphabets at the end of projector model numbers. - Models other than the above may also be supported. Refer to the operating instructions of the projector you are using.

■ Supplied Accessories

Make sure that the following has been provided.

Part name Appearance
Lens cover		● The product is delivered with a lens cap attached.● The shape and size of the lens caps are different for each product.1 each for front and rear
Spacer(T0SAS0001--)	(Colors: black, cream, clear)	4 each

Attaching / removing the projection lens

Before replacing the projection lens

Return the projection lens to the home position before replacing or removing it. For details on how to return the lens to the home position, refer to the operating instructions of the projector.

Attention

• Make sure that the projector power supply is switched off before attaching or detaching the projection lens. ● After removing the projection lens, store it safely away from vibration or impacts.
• Do not touch the electric contact points of the projection lens with your fingers. Dust and dirt on the contacts may cause contact malfunctions, while static electricity may damage the unit.

4-ENGLISH

Attaching / removing the projection lens (continued)

• Do not touch the surface of the lens with bare hands. Finger prints and dirt on the surface of the lens will be magnified by the lens and lower the quality of the projected image. Place the supplied lens cover on the zoom lens when the projector is not in use.
• The lens is made of glass. The lens could be damaged if brought into contact with or rubbed against hard objects. Handle the lens carefully.
• Use a clean, soft and dry cloth to wipe away dust and dirt from the projection lens. Do not use fluffy cloths containing oil, water or dust for cleaning. The lens is easily damaged, so do not apply excessive pressure when wiping it.

Attaching the Lens / Detaching the Lens

For details on attaching or removing the projection lens, refer to the operating instructions for the projector.

Making Adjustments

Correcting the Focus

When the projection lens is attached to the projector and images are being projected onto the screen, the peripheral focus may be out of focus in some localized areas. In such cases, use the supplied spacers to correct the focus of these areas, and perform adjustments so that the entire image is even.

Relationship between lens orientation and screen focus

If the projection lens is tilted with respect to the plane of the screen, uneven focus will result. For example, when the front side of the lens (screen side) is tilted downward as shown in the figure below (direction of the dotted arrow), the upper part of the screen will be tilted backward and the lower part of the screen will be tilted forward.

Procedure for correcting the focus

Attention

● Turn off the projector before removing the projection lens.

Note

- Focus correction requires some technical skill. Be sure to have a person with knowledge of projectors or a service technician to perform adjustments.

Making Adjustments (continued)

Fig. 1

Fig. 2 1) Install the projector in the installation location, and turn it on to project an image. 2) Move the lens to its home position. 3) Operate the projector to shift the focus of the entire projected image toward the front of the screen. 4) Operate the projector to shift the focus toward the screen a little bit at a time until one of the areas A to D in Fig. 1 just comes into focus on the screen, and then stop.

- In this state, the "just focus points" of the unfocused areas are positioned just in front of the screen. The distance between this position and the screen is the correction distance.

5) Insert the spacers between the body of the projector and the lens mounter, as shown in Fig. 2.

- Remove the lens mounter from the projector, and insert the spacers in the positions that correspond to the unfocused areas.

- The "just focus points" of the areas for which you inserted spacers will be corrected toward the rear of the screen.

● Make sure the adhesive surfaces of the spacers face the lens mounter when inserting them.

● The correction distance is determined by the thickness and quantity of spacers inserted. Insert spacers according to the correction distance.

(The unit for correction distances derived from the formulas in the following table is millimeters.)

Spacer Color	Thickness		Correction distance during projected image size SD (m)
	Clear 0.1 mm	SD × SD × 51.5
	Black	0.2 mm SD ×	SD × 103
	Cream	0.3 mm SD ×	SD × 154.5

Correction distance guide: When the projected image size is 1.52 m (60 in.), the corrected distance when one 0.1 mm thick spacer is inserted is 120 mm.

Attention

- Installing the lens mounter, be careful not to put wiring between the lens mounter and the projector unit.

Projection relationships

The dimensional relationship between the screen and the projector is shown below.

Dimensional relationship diagram

Note

• This diagram assumes that the size and position of the projected image will be adjusted so that the image fills the entire screen. ● This illustration is not drawn to scale.

L Projection distance

LW Minimum distance

LT Maximum distance

L1 Lens protrusion dimension

SH Image height

H Distance from the lens center to the lower edge of the projected image

SW Image width

SD Projected image size

● L1 dimensions (approximate values) (Unit: m)

Projector model ET-ELW21 ET-ELW20 ET-ELT22 ET-ELT23
PT-MZ770 / PT-MW730 / PT-MZ670 /PT-MW630 / PT-MZ570 / PT-MW530	0.005 0.035 0.036 0.032
PT-EZ770 / PT-EW730 / PT-EX800 0.050 0.080 0.081 0.080

Note

- The illustrations of projectors in this manual are for informational purposes only and do not represent a specific projector model. Configurations may vary with the model.

Projection relationships (continued)

Attention

• To prevent blocking of the intake and exhaust vents, maintain clearances from walls and objects of at least 1 000 mm (3'3") for the exhaust vent and at least 500 mm (1'8") for the intake vent.
• Avoid setting up in places which are subject to sudden temperature changes, such as near an air conditioner or lighting equipment (studio lamps, etc.).

■ Dimensional relationship

For details on the projection distance (L), refer to “Projected image size and Projection distance” and “Projection distance formulas” in the Appendix.

Note

- For details on “Projected image size and Projection distance” for projector models other than PT-MZ770 / PT-MW730 / PT-MZ670 / PT-MW630 / PT-MZ570 / PT-MW530 / PT-EZ770 / PT-EW730 / PT-EX800, refer to “Setting up” in the operating instructions of the projector.

Lens shift ranges

Perform the lens position shift within the adjustment range.

Perform lens shift adjustment within the ranges shown in the following illustrations. Moving the lens outside of the adjustment ranges may alter the focus. The focus may change when the lens position is shifted out of the adjustment range. This is because the movement of the lens is restricted to protect the optical parts. Projection position can be adjusted with the optical axis shift based on the home position in the respective range.

Lens model ET-ELW20 / ET-ELT22 / ET-ELT23
PT-MZ770 / PT-MW730 / PT-MZ670 / PT-MW630 / PT-MZ570 / PT-MW530	Standard projection position

Lens shift ranges (continued)

Lens model ET-ELW20 / ET-ELT22 / ET-ELT23
PT-EZ770 / PT-EW730
PT-EX800

Note

• Lens shifting cannot be performed when a fixed-focus lens (model no.: ET-ELW21) is attached. The home position of the projector is a point of origin position for the lens shift (i.e., vertical and horizontal positions of the lens) based on the results of lens calibration. It is not the optical center position of the screen.

Specifications

Check the specifications of each projection lens, and use the appropriate lens for your intended use.

Model No. ET-ELW21 ET-ELW20 ET-ELT22 ET-ELT23
Lens Type Short		fixed lens Short zoom lens Long zoom lens			Ultra long zoom lens
F value 2.0 1.8 to 2.3 1.8 to 2.3 1.8 to 2.3
Focal Length (f) 13.05 mm 20.4 to 27.6 mm 45.6 to 73.8 mm 73.9 to 117.1 mm
Dimensions*1	Width	108 mm (4-1/4")	116 mm (4-9/16")	108 mm (4-1/4")	108 mm (4-1/4")
	Height	108 mm (4-1/4")	116 mm (4-9/16")	108 mm (4-1/4")	108 mm (4-1/4")
	Depth	166 mm (6-17/32")	196 mm (7-23/32")	197 mm (7-3/4")	196 mm (7-23/32")
Net Weight		1.08 kg (2.38 lbs)	1.20 kg (2.65 lbs)	1.18 kg (2.60 lbs)	1.20 kg (2.65 lbs)

*1: Excluding protrusions.

Dimensions

(Unit: mm)

Model number Dimensions
ET-ELW21

Dimensions (continued)

Model number Dimensions
ET-ELW20
ET-ELT22
ET-ELT23

Information for users in the European Union

Importer's name and address within the European Union

Panasonic Marketing Europe GmbH

Panasonic Testing Centre

Winsbergring 15, 22525 Hamburg, Germany

Disposal of Old Equipment

Only for European Union and countries with recycling systems

This symbol on the products, packaging, and/or accompanying documents means that used electrical and electronic products must not be mixed with general household waste.

For proper treatment, recovery and recycling of old products, please take them to applicable collection points in accordance with your national legislation.

By disposing of them correctly, you will help to save valuable resources and prevent any potential negative effects on human health and the environment.

For more information about collection and recycling, please contact your local municipality.

Penalties may be applicable for incorrect disposal of this waste, in accordance with national legislation.

Information on Disposal in other Countries outside the European Union

This symbol is only valid in the European Union.

If you wish to discard this product, please contact your local authorities or dealer and ask for the correct method of disposal.

Product Information (for Turkey only)

Web Site : https://panasonic.net/cns/projector/

© Panasonic Corporation 2018

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