Pentacon's late-50s Dresden M42 SLR — the F, cloth shutter, fully mechanical, 1957.
The Pentacon F is a 35mm film SLR made in Dresden, East Germany, in the late 1950s, one of the early Pentacon-branded bodies descended from the pioneering Contax S pentaprism SLR built in the same city. It represents the plainer of the pair alongside the FM, dating from the era when Dresden was defining the eye-level pentaprism SLR.
It is an M42 screw-mount SLR with a horizontal-travel cloth focal-plane shutter; the F offered a more limited speed range than the FM, which added slower speeds. It has a fixed pentaprism finder and no built-in meter, so exposure is set fully manually. The shutter is mechanically timed and works entirely without a battery.
The F suits collectors and users drawn to early Dresden SLR history, or anyone wanting a simple, battery-free mechanical M42 body to use with a handheld meter. Handling is basic in the late-1950s manner, and it accepts the wide pool of M42 lenses; the absence of a meter, the narrower shutter range and the general age-related fragility are the practical limitations.
On the used market these are old cameras, so mechanical soundness is the priority: run the cloth shutter across its speeds watching for capping, pinholes, a sticky curtain or off slow speeds, all common at this age. Inspect any light seals and dampers for perishing or hardening, examine the prism for desilvering or haze, and test advance and rewind gently. With no meter present, focus your assessment on shutter accuracy and overall mechanical condition.