Lens Industar-69 has connection thread - M39 but the flange focal distance 27.5 mm, standard distance for m39 lenses is 28.8 mm, so you can`t focus to infinity! INDUSTAR-69 M39 mount 2.8/28mm MACRO Wide Angle Pancake Lens.
Industar-69 28mm f/2.8 USSR Lens M39 LTM Pancake Vintage Sharp Mirrorless camera
Industar-69 28mm f/2.8 Soviet Wide Angle Lens M39 L39 USSR
INDUSTAR 26m 2.8 52 mm Leica Zorki FED Rangefinder Photo Lens M39
INDUSTAR 26m 2.8/52 mm M39 Leica Zorki FED Rangefinder Photo Lens Yellow
Photo Lens INDUSTAR-61 L/D 2.8/55 mm mount M39 for Leica Zorki FED
