Originally posted by marcinski That's Industar 61-L
In Picture
Industar 61-L/Z MC version (Индустар-61Л/З 2,8/50)
(not 61-L):
Focus Distance = 50mm
f2.8
M42 screw for SLR
Industar-61 (И-61)
f2,8
52mm, 53mm, 55mm
M39 screw for Rangefinders
Industar 61-A
f2.8
52mm
M42 screw for SLR
Industar 61-Z (З-kirilica )
f2.8
52mm
M39 screw for SLR
Industar 61-M
f2.8
50mm
M42 screw for SLR
Industar 61-L
f2,8
52mm
M39 screw for Rangefinders
Industar-61L/D (Индустар-61Л/Д)
f2,8
53mm
M39 screw for Rangefinders
Industar-61L/Z and Industar-61L/D (Индустар-61Л/З , Индустар-61Л/Д):
"Л" (L) with "Lantan glas"
"З" - "зеркальных фотокамер" - for SLR
"Д" - "дальномерных фотокамер" - for Rangefinders