To meet the requirements of digital photography, the Leica Super-Elmar-M 21mm f/3.4 ASPH is a benchmark in all optical performance characteristics. The stray light optimization was implemented on a very high level, allowing for backlit shots with crystal clear contrast. The design of the metal lens hood matches the appearance of the current wide-angle lenses of the Leica M system. This lens hood is also compatible with the Leica Super Elmar-M 24 mm f/3.8 ASPH and the Leica Summilux-M 35mm/1.4. With the Leica M8 and M8.2, the Leica Super-Elmar-M 21mm/3.4 ASPH has an equivalent focal length of 28 mm making it a practical standard wide-angle lens for use with the Leica M8 and M8.2.
- Wide angle view for architecture, street and landscape photography
- Excellent image quality at full aperture. Distortion, vignetting and chromatic aberration have been reduced to a minimum
- Convenient to carry because of its compact size
- Flare resistant design allows for images under extreme backlight conditions
- The f/3.4 lens speed in combination with the short focal length allows sharp images even in available light situations
- Metal lens hood is included in the scope of delivery
- Can be used not only with digital M-cameras but with all Leica analog M-cameras since 1954
- Made in Germany
| Angle of view (diagonal, horizontal, vertical) | |
| For 35mm format (24x36mm) | 91°, 80°, 59° |
| For M8/M8.2 (18x27mm) | 74°, 64°, 46° |
| Optical design | |
| Number of elements / groups | 8 / 7 |
| Focal length | 21 mm |
| Entrance pupil | 15.6 mm (related to the apex of the first lens surface in light direction) |
| Focusing range | 0.7 m (2.3 ft) to Infinity |
| Distance setting | |
| Scale | combined meter/feet-increments |
| Smallest object field |
706 mm x 1059 mm (35mm format) 530 mm x 795 mm (for M8/M8.2) |
| Highest reproduction ratio |
1:29.4 |
| Aperture |
|
| Setting / Type | Preset, with clickstops (including half values), manual diaphragm |
| Smallest aperture | f/16 |
| Bayonet | Leica M quick-change bayonet with 6-bit bar coding for digtal Leica models |
| Filter (type) | internal thread for screw-on filters size E 46 |
| Lens hood | outer threading with stop for mounting the metal lens hood |
| Dimensions and weight | |
| Length | 43 mm (1.69 in) / 55 mm (2.17 in) (with/without lens hood attached) |
| Largest diameter | 53 mm / 2.1 in |
| Weight | approx. 279 g / 9.84 oz |
| Accessories included | Metal lens hood, front cap for lens hood, rear cap, leather case, instruction manual |