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9.6/10
Version Notes
This double Gauss Biotar design "special optic" (SO) lens was developed for the German Stasi surveillance camera (GSK), to focus through small openings. It has coatings to minimize infrared hotspot and it is also focus corrected for the infrared wavelengths.
Mount:
Year:
Type:
Focus:
Focal Length:
Aperture range:
Aperture Steps:
Blades:
Min. Focus:
Filter:
Optics E/G:
Weight:
Length:
Angle:
Hood:
M42
1970
Special Optics
Manual
50mm
f/2.8 - 16
(None)
None / 16
?m
None
?
?g
?mm
46°
No
Notes
More information about these lenses can be found here:
http://www.marcocavina.com/articoli_fotografici/Zeiss_cute_DFR_DDR_lenses/00_pag_English.htm
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