Carl Zeiss Touit 12 mm f/ 2.8 Lens Ficha De Dados
F-Distagon
®
T
* f/2.8 - 16 mm
The 16 mm F-Distagon
®
f/2.8 lens is a super
wide-angle lens of the so-called fisheye type with
high speed and excellent image quality. With
regard to its use in general photography, the focal
length was chosen in such a way that the 35 mm
format is fully utilized.
The relation between image height u and angular
field w is given by u = 2 f x sin w/2 (equivalent
projection). Most important for general
photography are, above
high speed and excellent image quality. With
regard to its use in general photography, the focal
length was chosen in such a way that the 35 mm
format is fully utilized.
The relation between image height u and angular
field w is given by u = 2 f x sin w/2 (equivalent
projection). Most important for general
photography are, above
all, the excellent image quality and the remarkable
image field illumination at full aperture, i.e. when
the incredibly high speed of this lens is fully utilized.
image field illumination at full aperture, i.e. when
the incredibly high speed of this lens is fully utilized.
This super wide-angle lens is well suited for
panorama photography where distortion
phenomena can be avoided by skilful camera work,
for detail photography where space is extremely
limited and for photographs for which the extreme
wide-angle perspective or distortion are essential
elements of the picture.
panorama photography where distortion
phenomena can be avoided by skilful camera work,
for detail photography where space is extremely
limited and for photographs for which the extreme
wide-angle perspective or distortion are essential
elements of the picture.
Cat. No. of lens:
10 48 39
Focusing range:
∞
to 0.3 m
Number of elements:
8
Entrance pupil:
Number of groups:
7
Position:
15.6 mm behind the first lens vertex
Max. aperture:
f/2.8
Diameter:
5.5 mm
Focal length:
15.8 mm
Exit pupil:
Negative size:
24 x 36 mm
Position:
30.5 mm in front of the last lens vertex
Angular field 2w*:
180º diagonal
Diameter:
23.9 mm
Mount:
focusing mount with bayonet;
Position of principal planes:
TTL metering either at full aperture
H:
27.8 mm behind the first lens vertex
or in stopped-down position.
H':
21.8 mm behind the last lens vertex
Aperture scale:
2.8 - 4 - 5.6 - 8 - 11 - 16 - 22
Back focal distance*:
37.6 mm
Filter connection:
built-in filter turret
Distance between first and
(UV; Or 57; Y 50; B 11)
last lens vertex:
66.5 mm
Weight:
approx. 460 g
* at
∞