HELIOS 77M-4 USSR Soviet Union Russian 1,8 / 50 M42 SLR DSLR lens M42

HELIOS-77M-4 58mm F2 USSR RUSSIAN VALDAY SLR LENS SCREW M42 PENTAX/ZENIT CANON WILL FIT: All M42 (M 42) screw-mount 35mm MF (Manual Focus) SLR film cameras: Asahi Pentax, Bessaflex, Chinon, Contax (VEB/DDR), Cosina, Edixa, Exa, Exakta (Japan), Fujica, Icarex, Mamiya, Olympus, Pentacon, Petri, Praktica, Praktiflex, Porst, Regula, Revueflex, Ricoh, Soligor, Vivitar, Voigtländer, Yashica, Zenit. Other SLR and DSLR cameras with the use of an adapter: Canon, Minolta, Nikon, Olympus, Pentax. Has an 6-blades iris. With multicoated (mc) optics Has identical optical design with the Carl Zeiss Jena 58/2 Biotar lens Lens mount: M42 Focal length: 58mm Relative aperture: 1:1.8 Scale of diaphragms: from 2 to 16 Diaphragm: Manual Focusing range: from 0.5m to 10m to infinity