The FED is a Soviet rangefinder camera, mass-produced from 1934 until around 1996, and also the name of the factory that made it.
The FED 4 is a 35mm film rangefinder camera made by FED and produced between 1964-80 with quantity 633.096 units.
Its main improvement over the FED-3 is its added uncoupled selenium meter, with a window in front of the speed dial. The meter has a scale on the user's left of the top-plate, with a match-needle linked to a calculator dial. The placement of the meter calculator leaves the rewind as a thumb-wheel on the end of the camera.
Foto-Quelle sold the FED-4 in Germany as the Revue 4 (F194). Special editions were produced for the 1980 Olympics in Moscow, and the 50th anniversary of the October Revolution in 1967.