Zenith - Russian made

Type: Reflex camera
Lens: replaceable, thread M42, originally mounted Lens HELIOS M44 2/58 Aperture: from 2 to 16
Shutter: focal-plane shutter
Shutter times: from 1/30 to 1/500 plus B
Viewfinder: pentagonal prism.
Self-timer: 7 s.
Exposure-meter: external selenium exposure-meter, placed above the lens.
Frame size: 24×36