INDUSTAR-26U USSR Soviet Union Russian Lens for Enlarger M39
INDUSTAR-26U USSR Soviet Union Russian Lens for Enlarger M39 Technical Data: Lens mount: M39 Focal length: 52mm Relative aperture: 1:4.5 Scale of diaphragms: from 2,8 : 4 : 5.6 : 8 :11 : 16