Zorky-4 was produced at KMZ from 1956 to 1973. The volume of production is about 1.7 million pieces.
Rangefinder device
The viewfinder is aligned with the rangefinder, the eyepiece magnification is 1.15 ×. There is a diopter adjustment.
Rangefinder base 38 mm.
Standard lens Jupiter-8 2/50 or Industar-50 3.5 / 50.
Lens mount - M39 × 1 thread. The working distance is 28 mm.
The shutter is made of cloth, focal-plane with a horizontal movement. In this instance, the shutter beats a set of shutter speeds: 1, 1/2, 1/5, 1/10, 1/25, 1/50, 1/100, 1/250, 1/500, 1/1000 and V.
There is a wired flash sync. Sync speed - 1/25. There is an adjustment of the pre-ignition time of the flashes, taking into account electronic or disposable lamps of different types.
The device has a self-timer.
3/8 '' tripod socket.
The weight of my copy without the lens is 612 grams.