Carl Zeiss Touit 12 mm f/ 2.8 Lens Scheda Tecnica

Distagon

* f/2.8 - 21 mm

This 21 mm Distagon

* f/2.8 wide-angle lens

with its angular field of 92º meets the demand of
experienced wide-angle photographers for a lens
which would bridge the relatively large gap
between the 18 mm Distagon

f/4 and 25 mm

Distagon

f/2.8 lenses in the Contax

lens range.

This new lens, however, is not a modification of the
existing wide-angle lenses, but a totally new design
using the latest technologies.

All of the possibilities of correcting residual

chromatic aberration were utilized to the full. The
systematic use of glass featuring extreme
anomalous partial dispersion combined with
high-index glass resulted in a level of correction
never achieved before. The incorporation of an
internal focusing system and a floating element
ensures that this new lens delivers superior image
quality in all conditions.

Cat. No. of lens: 10 49 26 Focusing range:

∞

to 0.25 m (internal focusing)

Number of elements: 15 Aberration correction for
Number of groups: 13 close range by floating element
Max. aperture: f/2.8 Entrance pupil:
Focal length: 21.0 mm Position: 23.2 mm behind the first lens vertex
Negative size: 24 x 36 mm Diameter: 7.3 mm
Angular field 2w*: 92º diagonal Exit pupil:
Mount: focusing mount with bayonet; Position: 26.2 mm in front of the last lens vertex

TTL metering either at full aperture Diameter: 22.2 mm
or in stopped-down position. Position of principal planes:
Aperture priority/Shutter priority/ H: 37.2 mm behind the first lens vertex
Automatic programs H': 16.0 mm behind the last lens vertex
(Multi-Mode Operation) Back focal distance*: 37 0 mm

Aperture scale: 2.8 - 4 - 5.6 - 8 - 11 - 16 - 22 Distance between first and
Filter connection: screw thread M 82 x 0.75 last lens vertex: 96.7 mm

Weight: approx. 530 g

* at

∞