LOMO OKS1-8.5-1 (3.5/8.5mm)

This seems to be widest LOMO lens for 35mm cine film camera ever made. It is very rare, and I didn't saw it in real life. Widest lenses I had were 10mm ones.

Specification of LOMO OKS1-8.5-1 optical block

Lens system

Focal length
f' 8.6 mm
Angle of view 2ω' 116°
Effective relative aperture f:ne 1:4
Lens length
Σd 81.2 mm
Front focal length S -
Back focal length S' 22.1 mm
Flange focal distance Z
34 mm
Block length
B 83 mm
Block max. diameter
D 185 mm
Rear diameter
D' -
Front element diameter
d1 114 mm
Rear element diameter
11.6 mm
Mount thread

Distance from rear end of the housing
to the focal plane
Aperture blades quantity

Frame size

16x22 mm
740 g

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