LENSES
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Document ID: 3020517/0610
CLOSE FOCUS RANGE DATA:
Minimum distance object to film 0.42 m
Corresponding distance object to front lens 0.25 m
Maximum image scale 1: 4.7
Corresponding area of coverage 26 x 26 cm
Corresponding exposure reduction 0.4 f-stop
DISTAGON
FE 2.8/50
100
80
60
40
20
0
0 10 20 30 4
0
Image height (mm)
f/2,8
MTF (%)
100
80
60
40
20
0
0 10 20 30 4
0
Image height (mm)
f/5,6
MTF (%)
MTF
Modulation Transfer as a func-
tion of image height at infinite
focus setting.
Sagittal slit orientation drawn
with continuous line and tan-
gential with dashed. White
light. Spatial frequencies 10,
20 and 40 lp/mm
ENTRANCE PUPIL POSITION
136 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.
LENSES
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To convert meters into feet, multiply by 3.281. To convert meters into inches, multiply by 39.37
Document ID: 3020517/0610
Depth-of-field in meters
f/2.8 f/5.6 f/11 f/22
∞ 16 - ∞ 8 - ∞ 4 - ∞ 2 - ∞
6 m 4.5 - 9.5 3.5 - 20 2.5 - ∞ 1.5 - ∞
3 m 2.6 - 3.6 2.3 - 4.5 1.8 - 10 1.3 - ∞
2 m 1.8 - 2.25 1.65 - 2.6 1.4 - 3.5 1.1 - 20
1.4 m 1.31 - 1.5 1.25 - 1.65 1.1 - 1.9 0.9 - 3.5
1 m 0.96 - 1.05 0.92 - 1.1 0.85 - 1.2 0.75 - 1.6
0.8 m 0.775 - 0.825 0.75 - 0.85 0.72 - 0.92 0.65 - 1.1
0.7 m 0.683 - 0.72 0.67 - 0.74 0.64 - 0.78 0.59 - 0.9
0.6 m 0.589 - 0.612 0.58 - 0.625 0.56 - 0.65 0.53 - 0.71
0.55 m 0.541 - 0.559 0.533 - 0.57 0.52 - 0.59 0.49 - 0.64
0.5 m 0.494 - 0.507 0.487 - 0.515 0.475 - 0.53 0.455 - 0.56
0.45 m 0.445 - 0.455 0.441 - 0.46 0.433 - 0.47 0.42 - 0.49
0.42 m 0.416 - 0.424 0.413 - 0.428 0.405 - 0.435 0.395 - 0.45
DISTAGON
FE 2.8/50
Depth-of-field data
Given distances are calculated for a blur circle diameter of 60 microns and do not include the effect of lens aberrations.
For very critical photography and great enlargements this blur will be visible.
For these situations we recommend a conservative use of the DOF data. In such situations the data given for an aper-
ture two f-stops larger should be used (for example, if shooting at f/8, use DOF data for f/4).
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