Carl Zeiss Touit 12 mm f/ 2.8 Lens Manual Técnica
Distagon T* 2/28 ZF
Carl Zeiss AG
Camera Lens Division
73446 Oberkochen
73446 Oberkochen
Germany
Tel: +49 (0) 73 64 20-61 75
Fax: +49 (0) 73 64 20-40 45
Email: photo@zeiss.de
Email: photo@zeiss.de
www.zeiss.de/photo
Performance data
0
20
40
60
80
100
0
5
10
15
20
u'[mm]
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
0
5
10
15
20
u'[mm]
0
20
40
60
80
100
0
5
10
15
20
u' [mm]
0
20
40
60
80
100
0
5
10
15
20
u' [mm]
f-number: k = 2
f-number: k = 4
Relative illuminance
Distortion
Modulation transfer MTF as a function of the image height (u´) and slit orientation.
White light. Spatial frequencies R=10, 20 and 40 cycles/mm.
White light. Spatial frequencies R=10, 20 and 40 cycles/mm.
MTF [%]
MTF [%]
E [%]
V [%]
Sagittal
- - - Tangential
- - - Tangential
Sagittal
- - - Tangential
- - - Tangential
k=2
· · · k=4
· · · k=4