great lens!
possible micro scratches from rubbing! will not affect the photo
Lens mount: M39
focal length: 50mm
Relative aperture: 1: 3.5
Scale of diaphragms: from 3.5 to 16
Diaphragm: Manual
apertures F/16, 11, 8, 5.6 4 3.5
Focusing range: from 1m to infinity