SummiluxM 50 f1.4 ASPH. - Lens LEICA - Free user manual and instructions

USER MANUAL SummiluxM 50 f1.4 ASPH. LEICA

a. Female filter thread b. Male filter thread for lens hood

3. Index for mounting the lens hood

4. Diaphragm setting ring

5. Focusing ring with

a. Index for focusing b. Depth of field scale c. Red alignment button for lens change

a. Female filter thread b. Male filter thread for lens hood

3. Index for mounting the lens hood

4. Diaphragm setting ring

5. Focusing ring with

a. Index for focusing b. Depth of field scale c. Red alignment button for lens change

a. Female filter thread b. Male filter thread for lens hood

3. Index for mounting the lens hood

4. Diaphragm setting ring

5. Focusing ring with

a. Index for focusing b. Depth of field scale c. Red alignment button for lens change

Optical design Number of lenses / groups 10 / 7 Aspherical surfaces 1 Position of entrance pupil 31.9mm (from bayonet flange) Distance setting Focusing range 0.7m to ∞ Scales Combined meter/feet graduation Smallest object field / Maximum scale For 35mm format, approx.: 526 x 789mm/ 1:21.9, for Leica M8 models, approx.: 395 x 592mm / 1:21.9

Aperture Setting / Function Indexed settings, half values available Lowest value 16 Bayonet fitting Leica M quick change bayonet with 6 bit barcode lens identification for digital Leica M models

Filter mount / Lens hood Non-rotating, internal thread for E49 screw-in filters, external thread with stop for screw-on lens hood (included) Viewfinder Camera viewfinder

Leica M4-P (from no. 2 411 001), otherwise external viewfinder (available as accessory)

Finish Black anodized Dimensions and weight Length to bayonet mount approx. 81/67mm (without/with lens hood) Largest diameter approx. 61mm Weight approx. 447g Compatible cameras All Leica M cameras 3,5

The nominal focal lengths of the Leica M lenses are based on the 35mm film format, i.e. an initial format of 24x36mm. However, the sensor on the Leica M8 is slightly smaller at 18x27mm, by a factor of 0.75. Therefore the field angle of these lenses on Leica M8 models always corresponds to that for lenses with focal lengths longer by a factor of 1.33 (1.33 = reciprocal of 0.75). This has no impact on the depth of field, which can be read directly on the lens on the Leica M8 as on all other models.

The 6-bit lens code in the bayonet (7) allows digital Leica M models to identify the attached lens type. The cameras use this information to optimize the exposure and image data.

All Leica M cameras without the 28mm bright line frame, except for those with a 0.85x viewfinder, the M3 and the former Leica MP (professional version of M3) can be fitted with this by Leica Camera AG Customer Care department (see p. 21 or your Warranty Card for addresses) – it then appears in conjunction with the 90mm bright line frame.

This does not depend on the initial format of the relevant camera - whether this is 18x27mm (sensor size) on Leica M8 models or 24x36 on all other Leica M models. SPECIAL FEATURES The Leica Summilux-M 28mm f/1.4 ASPH rounds off the range of high-speed M wide angle focal lengths. It offers excellent image performance over the entire image field even at full aperture and in the close-up range thanks to a „floating element“. With its exceptional contrast, the lens delivers the same recognized

high performance level as the Leica Summilux-M 35mm f/1.4 ASPH, and in some respects actually outperforms it. The vignetting that is typical of every optical system is naturally more defined on a wide angle lens, particularly a high speed one like this, than on standard lenses or those with a long focal length. At full aperture in 35mm format it is a maximum, i.e. in the corners of the image, of around 3.4 stops, around 2 stops on Leica M8 models with their slightly smaller format. Stopping down to 5.6 visibly reduces this light falloff – to 1.8 and 0.8 stops respectively. Stopping down further does not bring about any notable reduction as essentially only the natural vignetting remains. Distortion is extremely low for a wide angle lens at a maximum of 1.1% (pulvinate), which is rarely noticeable in practice. A total of ten lens elements are used to achieve this exceptional performance. To correct color defects, seven of these are made of glass types with anomalous color dispersion (partial dispersion), while one has an aspherical surface. To maintain performance in the close-up range, one element towards the rear of the optical system is a “floating element” that moves independently of the rest of the mechanism. Summary: The Leica Summilux-M 28mm f/1.4 ASPH offers maximum image performance with a focal length / speed combination previously unavailable in the M system. This extends the composition options of M photography, particularly for available light shots, but also thanks to a previously unattainable reduction in the depth of field combined with large field angles.

15STRUCTURE OF LEICA M LENSES

In principle, all Leica M lenses have the same external structure: they have an aperture setting ring (4), a setting ring for the distance (5) with a finger grip (5a) and a fixed ring (6) with an index for focusing (6a), a depth of field scale (6b) and a red index button for changing the lens (6c). There is also an external thread (2a) on the front mount of the Leica Summilux-M 28mm f/1.4 ASPH for attaching the lens hood. The bayonet flange contains a 6-bit barcode lens identification (7), which transmits lens data to the camera body. This is used to adjust the exposure metering system on digital Leica M models and to optimize the image data for the lens type. FOCUSING The focus is adjusted by turning the focusing ring (5). The finger grip (5a) enables you to work quickly and comfortably.

DEPTH OF FIELD SCALE

The scale (6b) on the fixed ring (6) shows the depth of field range available for the set distance. This is read off using the corresponding lines labeled with the aperture values.

LENS HOOD The Leica Summilux-M 28mm f/1.4 ASPH comes complete with a screw-on lens hood (1). To attach it, screw on the square lens hood as far as it will go (clockwise). The special design of the threads on the lens hood and the lens front mount (2b) – with stop – ensures that the lens hood is correctly aligned. This guarantees that the lens hood does not impair the optical path of the lens or the distance meter, i.e. it prevents vignetting in the image and shadowing in the distance meter measuring field. At the same time, the gap in the top left corner of the lens hood minimizes coverage of the viewfinder image on the Leica M. When the camera is being carried or used and is ready to shoot, this hood should always remain fitted. It provides effective protection against contrast- reducing stray light and also against damage and soiling of the front lens, e.g. from accidental fingerprints. Notes:

• The lens hood must always be screwed on as far as it will go.

Dust on the outer lenses should be removed with a soft hair brush or carefully using a clean, dry, soft cloth. Micro fiber cloths (available from specialist retailers) are ideal and can be washed at up to 40°C. To remove marks or fingerprints, wipe the lens with this cloth starting in the middle and working towards the edge in a circular motion. Special cleaning cloths for glasses should not be used as they are impregnated with chemicals that can damage the types of glass and coatings used. The bayonet is given an ultra-thin film of grease in the factory to ensure that the lens can be changed easily, gently and smoothly. In normal use, this is retained for many years even if the bayonet is occasionally wiped with a clean cloth. If a substance that dissolves grease is used for cleaning, the grease film must subsequently be replaced. To do this, coat the bayonet with a tiny amount of Vaseline with a finger and spread using a clean cloth. Important: Make sure that the area around the lens identification (7) in the bayonet fitting is left clear, as otherwise grease residue can accumulate in the recess and collect more dirt. This could impair the legibility of the code and thus restrict camera functions on digital M models. In addition to the type designation, every lens has its “personal” serial number. Note this number in your documentation for security.

19LEICA INFORMATION SERVICE

Should you have any technical questions regarding the use of Leica products, the Leica information service will be happy to answer in writing or by phone, fax, or e-mail: Leica Camera AG Product Support / Software Support Am Leitz-Park 5 D-35578 Wetzlar Tel.: +49(0)6441-2080-111 /-108 Fax: +49(0)6441-2080-490 info@leica-camera.com / software-support@leica-camera.com

a. Female filter thread b. Male filter thread for lens hood

3. Index for mounting the lens hood

4. Diaphragm setting ring

5. Focusing ring with

a. Index for focusing b. Depth of field scale c. Red alignment button for lens change