The Industar-26M 50 mm f/ 2.8 (Russian: "Индустар") is a standard fast lens with coating for rangefinder cameras with M39 Leica screw-mount.
The device came into serial production at the FED camera factory in Kharkov for Zorkiy (Зоркий) and FED (ФЭД) cameras.
A trial consignment was also released for the KMZ (КМЗ) SLR cameras.
The Industar-26 M (Индустар-26М) 50 mm f/ 2.8 does not handle well side and back light. It is recommended to use it with a hood.
Real focal length: 52.41 mm
Angle of View: 45°
Flange focal distance: 28.8 mm
Resolution (0 mm/10 mm/20 mm): 27/23/18 lines/mm.
Resolution according to the technical specifications (center/edge): 30/12 lines/mm.
Coefficient of transparency: 0.8
Geometric vignetting: 50%
Links to online resources:
Posted by: Joker62 Date of publication: 30.01.2011