Industar 61 Russian M39 lens

Industar 61 Russian M39 lens
Product description

Industar 61 Russian lens history Four lens anastigmat average luminosity with coated optics. Equipped with an iris, in the version for SLR cameras - more "jumping" diaphragm. In addition to the threaded ...

 

Industar 61 lens history

Russian industar 61 - Four lens anastigmat average luminosity with coated optics for zorki, fed russian cameras. Equipped with an iris, in the version for SLR cameras - more "jumping" diaphragm. In addition to the threaded lens Industar-61m 2,8 / 50 for connection M42x1/45, 5, Krasnogorsk factory produced version of the adapter ring for the "A" (Industar-61 A) 2,8 / 52, but also information on bayonet option - frame for the camera ZENIT-7. In addition to the CMH issued Lytkarino Optical Glass Factory (LZOS): Industar-61L, 2,8 / 52 - for rangefinder cameras (M39x1/28, 8), Industar-61 L Z 2,8 / 50 - for SLR Camera (M42x1/45 , 5), and the Kharkov plant FED: Industar-61 (I-61) 2,8 / 52, Industar-61L / W 2,8 / 53 2,8 / 55 - for rangefinder cameras, plus non-replaceable option for cameras with central gate FED-10 and formally non-replaceable bayonet option for the camera FED-11 Atlas. The technical characteristics and the lens focal distance themselves indicated as 50 mm, 52 mm, 53 mm or even 55 mm.

Industar 61 focal length of 50 mm (52.42 mm), aperture 1:2,8, field of view 46 °, frame size 24x36 mm. Number of elements / groups 4 / 3. Limits the scale of the diaphragms - 1:2,8-1:16. Resolution of N (center / edge): 45/28 lines / mm (according to other sources [101, p. 171] for a variant of LZ - center / edge - 40/27), light transmission 0,85. Formula Color: 11-0-1,5.