Industar's Tessar-type collapsible standard — 50mm f/3.5 in M39, crisp stopped down, cheap used.
The Industar-22 is a Soviet standard lens of Tessar type, made for the M39 (Leica thread) rangefinder mount and used on FED, Zorki and Leningrad bodies. The Industar family carries the four-element Tessar lineage through the Soviet system, and the Industar-22 is one of the early collapsible standard lenses that shipped with rangefinder bodies of its era.
This is a manual-focus, rangefinder-coupled Leica Thread Mount lens with a 50mm focal length and an f/3.5 maximum aperture. It uses the 39mm rangefinder thread and mounts on Leica screw bodies, subject to the slight Soviet-versus-Leica register difference. As a Tessar-type collapsible design it is very compact, retracting into the body for carrying.
Tessar-derived lenses of this kind are known for crisp, contrasty rendering when stopped down a little, with a flat and even field that suits general, travel and street use. The modest f/3.5 aperture keeps the lens small and the depth of field forgiving. It is a straightforward everyday standard whose character is defined by classic Tessar sharpness rather than a specialised bokeh signature.
On the used market the Industar-22 is an inexpensive, compact Soviet standard that offers strong value. Soviet QC varied by year and factory, so assess each sample individually. If the copy is collapsible, check that the tube extends and locks cleanly. Adapting to Leica may need a register check or shim. Inspect for haze and coating scratches, feel the aperture ring, and test the focus. It adapts readily to mirrorless with an M39 adapter.