Ken Hansen New York

A super fast, ultra wide-angle lens

A versatile performer
The Summilux-M 21mm f/1.4 ASPH. is the first and only lens with this size and lens speed. The outstanding quality, large angles, and compact dimensions make it a versatile performer. It works from full aperture – with an extremely shallow depth of field and a subject separated from the background - to a medium stop which can sharply and effectively reproduce entire scenes.

Technical details
The Summilux-M 21mm f/1.4 ASPH. consists of ten lenses in eight groups and incorporates five separate lenses with anomalous partial dispersion. As a result, vignetting and distortion are both excellently corrected. The floating element retains the lenses’ high resolution, even in the close-up range. A patented, rectangular lens hood fits Series VIII filters.

The essentials:

Diagonal angle of view: 92 °

Working range: 0.7 m to infinity

Biggest scale: 1:29

Number of lenses/groups: 10/8

Length * 1: 66 mm

Weight * 1: 580 g

Lens hood: can be screwed on

Filter/filter thread: Insertion filter Series VIII in lens hood

Made in Germany

AT A GLANCE

Widest Leica Summilux Lens Available

Ideal for Astrophotography

Floating Lens Element

IN THE BOX

21mm Summilux-M f/1.4 ASPH Lens

Hood Cap

Rear Lens Cap M

Lens Pouch

Angle of view (diagonal, horizontal, vertical):

92° / 81° / 59°

Optical design


Number of lenses/groups:

10 / 8

Focal length:

21.6 mm

Position of entrance pupil:

24.4 mm (related to the first lens surface in light direction)

Focusing range:

0.7 m to infinity

Distance setting


Scales:

Combined meter/feet graduation

Smallest object field:

685 x 1027 mm

Largest reproduction ratio:

1:29

Aperture

Setting/Function:

With click-stops, half values available, manual diaphragm

Lowest value:

16

Bayonet:

Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models

Filter mount:

Series filter VIII in lens hood

Lens hood:

Seperate, screw-on type

Dimension and weight

Length:

66 / 77 mm (without / with lens hood)

Largest diameter:

Approx. 69.5 mm

Weight:

Approx. 580 g