r Industar-22 KMZ Russian collapsible f3.5/50 lens for FED Leica M39 mount 1505

INDUSTAR-22  Russian collapsible 3.5/50 lens for FED LEICA M39 L39 mount FED 1, 2, 3, 4, 5,
Zorki 1, 2, 3, 4,5 , 6, LEICA II, III,  M39 mount.

Fine Condition.

All features of the item have been tested and work properly. Look at the picture!

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Produced for the first rangefinder cameras such as "Zorki" Had a variety of design options, including a folding option, similar to the lens Leitz Elmar (3,5 / 5 cm). At the end of the 1950s was replaced by the scaled, better lens of the same scheme - Industar-50. Focal length of 52 mm (51.39 mm), aperture of 1:3.5, the angle of view 46 °. Number of elements / groups of 4/3, the limits of the aperture scale 1:3,5 - 1:16 Closest focusing distance: rangefinder option - 1.25 m (1 m) for SLR Cameras - 1 m (0.65 m). The resolving power of TU (center / edge): rangefinder folding option - 32/22 lines / mm (according to other sources [101, p 171] - center / edge - 30/19), light transmission 0.80.