Leica Super-Elmar-M 21mm f/3.4 ASPH

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• Description
• Features
• Tech Specs

• 
  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