Carl Zeiss Touit 12 mm f/ 2.8 Lens Manual
Performance data:
Vario-Sonnar
Vario-Sonnar
®
T* 2.8/17-35
Cat. No. 10 47 68
Modulation transfer T as a function of image height u.
Slit orientation:
sag
White light. Spatial frequencies R = 10, 20 and 40 cycles/mm
tan
f-number
k = 2.8
f = 35 mm
f-number
k = 5.6
f = 35 mm
T (%)
T (%)
u (mm)
u (mm)
0
20
40
60
80
100
0
5
10
15
20
0
20
40
60
80
100
0
5
10
15
20
Relative illuminance
f = 35 mm
E (%)
u (mm)
0
20
40
60
80
100
0
5
10
15
20
k = 2.8
k = 5.6
Distortion in % of image height u
f = 35 mm
V
u (mm)
-2,0
-1,0
0,0
1,0
2,0
0
5
10
15
20
Subject to change.
Printed in Germany 29.05.2002
Carl Zeiss
Camera Lens Division
73446 Oberkochen
Germany
Telephone ++49-7364-20-6175
Fax ++49-7364-20-4045
eMail: photo@zeiss.de
http://www.zeiss.de/photo
Camera Lens Division
73446 Oberkochen
Germany
Telephone ++49-7364-20-6175
Fax ++49-7364-20-4045
eMail: photo@zeiss.de
http://www.zeiss.de/photo