LENSES
DISTAGON
CFi 4/50
CLOSE FOCUS RANGE DATA:
Minimum distance object to film
Corresponding distance object to front lens
Maximum image scale
0.50 m
0.33 m
1: 6.4
Corresponding area of coverage
Corresponding exposure reduction
35 x 35 cm
0.3 f-stop
ENTRANCE PUPIL POSITION
129 mm in front of the film plane.
(at infinite focus setting):
The entrance pupil position is the correct position of the
axis of rotation when making a panorama image by com-
bining individual images of a scene.
MTF
f/4
f/8
100
80
100
80
Modulation Transfer as a func-
tion of image height at infinite
focus setting.
60
60
Sagittal slit orientation drawn
with continuous line and tan-
gential with dashed. White
light. Spatial frequencies 10,
20 and 40 lp/mm
40
40
20
0
20
0
0
10
20
30
40
0
10
20
30
40
Image height (mm)
Image height (mm)
1/2
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