CONTAX 28/2.8 Zeiss Distagon T* MM
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Lens/groups: 7/7
Minimum focus: 0.25 m
Angular field: 74°
Filter: 55 mm
Size: 62.5 x 50 mm
Weight: 280 g
Focal lenght: 29.0
Year: 1978
Aperture Real ------- MTF -------
setting aperture Center(*) Border(*) Average(*)
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2.8 -.1 8.4 6.6 7.7
4 +.1 8.8 7.6 8.3
5.6 0 8.8 7.8 8.5
8 0 8.6 7.9 8.4
11 0 8.3 7.7 8.1
16 0 7.7 7.0 7.5
22 +.3 6.9 6.4 6.7
(*) = (3=poor, 5=sufficient, 7=good, 9=excellent)
Average= region between center and border, not maths average
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Distortion: - 2.0 % (barrel)
Vignetting: 0.7
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