CONTAX 135/2.8 Zeiss Sonnar T* MM
--------------------------------------------------------------
Lens/groups: 5/4
Minimum focus: 1.6 m
Angular field: 18°
Filter: 55 mm
Size: 68.5 x 93 mm
Weight: 585 g
Focal lenght: 136.1
Year: 1975
Aperture Real
------- MTF -------
setting aperture
Center(*) Border(*) Average(*)
--------------------------------------------------------------
2.8
-.1 7.8
7.6 7.7
4
0 8.0
7.7 7.9
5.6
0 8.1
7.8 8.0
8
+.1 8.2
7.6 8.0
11
+.1 8.0
7.4 7.8
16
+.1 7.7
6.6 7.4
22
+.2 6.8
6.0 6.5
(*) = (3=poor, 5=sufficient, 7=good, 9=excellent)
Average= region between center and border, not maths average
--------------------------------------------------------------
Distortion: + 1.0 % (cushion)
Vignetting: 0.45
--------------------------------------------------------------
