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Description
3M-5CA 8/500 (mirror type/ without diaphragm) Telephoto Lens.
3M-5CA 8/500 Telephoto Lens
3M-5CA 8/500 Telephoto Lens Specifications:
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Focal length,mm
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500
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Maximum aperture
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1:8
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Angle of view, deg.
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5
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Minimum focusing range,m
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4
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Working distance,mm
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45,5
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Camera mount thread
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M42 x 1
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Mount thread for screwed-in attachments
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M72 x 0,75
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Resolution, mm-1, min
- in centre
- off centre
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42
20
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Light transmission factor, min.
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0,75
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Light diffusion factor, max.
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0,03
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Overall dimensions, mm
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Diam. 83 x 139
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Mass, kg, max
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0,620
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See also: Rubinar 8/500 Telephoto Lens |
Rubinar 5,6/500 Telephoto Lens |
Rubinar 4,5/300 Telephoto Lens
Adapter ring for Minolta AF
For using auto focus Minolta cameras with M42 lenses (Praktica, Zenit). Metric scale M42 keeps its meanings due to compensation of the flange bases difference. Therefore focusing can be to infinity.
You should remember that the pusher with the fixed ring doesn’t work, so diaphragm control of the lens is set manually.
Bear in mind that aperture pusher is not pushed. It is possible to use Macro rings and other accessories.
Settings:
- Put red marks of the adapter and lens collar together.
- Turn the adapter clockwise till the fixative click.
- Set M42 lens.
Removing:
To remove the adapter you should unpress fixative pin and turn the adapter anticlockwise.
Note:
Working with M42 lenses acknowledgement of the focusing with green light is not made. The aperture is not set. Expo-modes:
- P (program) – identical to Av mode;
- Tv (flash priority) – doesn’t work;
- Av (diaphragm priority) – works as usual;
- M (manual) – aperture and flash are changed. Inaccuracy of exposure defining is indicated by expo-correction.
See also:
Adapter ring for Minolta MD | Minolta AF Lenses
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Users manuals
305 
