Carl Zeiss Touit 12 mm f/ 2.8 Lens Manuale Tecnico
Planar
®
T
* f/1.7 - 50 mm
For the Contax
®
owner this lens is an attractively
priced alternative to the fast 50 mm f/1.4 standard
lens. The relative aperture of 1:1.7 is absolutely
sufficient for many photographic purposes.
sufficient for many photographic purposes.
The image quality is excellent and can even be
compared with that of the 50 mm Planar
compared with that of the 50 mm Planar
®
f/1.4
lens at the corresponding f-stops. Specific mention
should be made of the relatively short design and
the low weight of this high-performance
seven-element lens.
should be made of the relatively short design and
the low weight of this high-performance
seven-element lens.
Cat. No. of lens: 10 21 55 Weight: approx. 195 g
Number of elements: 7 Focusing range:
Number of elements: 7 Focusing range:
∞
to 0.6 m
Number of groups: 6 Entrance pupil:
Max. aperture: f/1.7 Position: 22.9 mm behind the first lens vertex
Focal length: 51.9 mm Diameter: 30.4 mm
Negative size: 24 x 36 mm Exit pupil:
Angular field 2w: diagonal 47º Position: 28.9 mm in front of the last lens vertex
Mount: focusing mount with bayonet; Diameter: 41.0 mm
Max. aperture: f/1.7 Position: 22.9 mm behind the first lens vertex
Focal length: 51.9 mm Diameter: 30.4 mm
Negative size: 24 x 36 mm Exit pupil:
Angular field 2w: diagonal 47º Position: 28.9 mm in front of the last lens vertex
Mount: focusing mount with bayonet; Diameter: 41.0 mm
TTL metering either at full aperture Position of principal planes:
or in stopped-down position. H: 34.5 mm behind the first lens vertex
Aperture priority/Shutter priority/ H': 13.7 mm in front of the last lens vertex
Automatic programs Back focal distance: 38.2 mm
(Multi-Mode Operation) Distance between first and
or in stopped-down position. H: 34.5 mm behind the first lens vertex
Aperture priority/Shutter priority/ H': 13.7 mm in front of the last lens vertex
Automatic programs Back focal distance: 38.2 mm
(Multi-Mode Operation) Distance between first and
Aperture scale: 1.7 - 2.8 - 4 - 5.6 - 8 - 11 - 16 last lens vertex: 39.6 mm
Filter connection: clip-on-filter, diameter 57 mm
Filter connection: clip-on-filter, diameter 57 mm
screw-in filter, thread M 55 x 0.75