9.5/10

Version Notes

This Tessar 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:

M36

1970

Special Optics

Manual

75mm

f/3.5 - 16

(None)

None / 16

1m

None

?

?g

?mm

No

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