Zorki's most-produced rangefinder — 35mm, Leica Thread Mount, long-base finder, slow speeds, 1956.
The Zorki 4 is a Soviet 35mm rangefinder made by the KMZ plant at Krasnogorsk near Moscow, the most widely produced model in the Zorki line and a development of the advanced Zorki 3 series that grew from the Leica II copies. It appeared around 1956 and sold in very large numbers, including many exported to the West. It keeps the Leica screw mount and the long-base combined finder.
This is a 35mm coupled-rangefinder camera using the Leica Thread Mount (39mm screw). It has a horizontal-travel cloth focal-plane shutter with slow speeds and a combined rangefinder and viewfinder window with a long rangefinder base and diopter adjustment. Focusing is by the coupled rangefinder and exposure is set manually; there is no built-in meter. It loads through a removable back.
The Zorki 4 suits users who want a common, well-supported screw-mount rangefinder with a long rangefinder base for accurate focusing, working with Leica Thread Mount and Soviet Industar and Jupiter lenses. It is fully mechanical and fires without a battery. Its wide availability and the ready supply of matching Jupiter lenses make it a popular entry into screw-mount rangefinder shooting.
On the used market the Zorki 4 is very common, cheap and offers strong value, though the sample-to-sample quality-control variance typical of former-Soviet-Union bodies means individual checking matters. Inspect the rangefinder patch for contrast and horizontal alignment, examine the cloth focal-plane shutter curtains for pinholes and capping, and confirm the slow speeds run true. Aged shutter ribbons and slow-speed escapements are the usual service items.