LOMO OKS4-1000-1 (11/1000mm) lens data

The OKS4-1000-1 lens is purposed for usual film shots.

Manufacturer NPO "EKRAN"
Lens system -
Focal length
f'1000.0 mm
Angle of view2ω'1°33'
Effective relative aperturef:nэ1:12.2
Lens lengthΣd466 mm
Front focal lengthS-
Back focal lengthS'73.9 mm
Flange focal distanceZ-
Block lengthB520 mm
Block max. diameterD142 mm
Rear diameterD'-
Front element diameterd194.0 mm
Rear element diameterd228.0 mm
Mount thread -
Distance from rear end of the housing
to the focal plane
l-
Aperture blades quantity ?
Frame size 16x22 mm
Weight 4.9 kg