These cameras were produced by factory "FED" (Ukraine) since 1986.
Frame size 24X36mm

Shutter: apperture-type, behind the lens Automatic mode (with selenium element, no batteries):
Exposure - from 1/30 to 1/650 s
Diaphrgm - from 2.8 to 14

Manual control mode:
Exposure - 1/30 and "B"
Diaphrgm - from 2.8 to 16
It has 1/4" tripod thread. M46x0.75 Thread for filters

Lenses: Industar-81(2.8/38mm)
Relative aperture: f/2.8
Focusing, m: 1 to infinite