Zenit's long-run Soviet M42 SLR — the ET, selenium meter, fully mechanical, 1981.
The Zenit ET is a 35mm film SLR made in the Soviet Union by KMZ and BelOMO from the early 1980s, a long-running budget model that continued the basic Zenit-E lineage. It was produced in large numbers over an extended run and exported as a cheap, simple mechanical SLR, keeping the traditional Zenit formula going well into the 1980s and beyond.
It is an M42 screw-mount SLR with a horizontal-travel cloth focal-plane shutter offering a limited speed range, typically around 1/30 to 1/500 plus B. The ET has an uncoupled selenium-cell exposure meter that needs no battery, read and transferred manually by the photographer. Exposure is fully manual and the shutter is entirely mechanical, so the camera works without any battery.
The Zenit ET suits students, beginners and users wanting a cheap, battery-free mechanical SLR to learn on, and it is heavy and simply built like its predecessors. The limited shutter range, lack of automation and, on many examples, a non-instant-return mirror restrict fast and low-light work; these are the expected characteristics of the basic Zenit design.
On the used market, Soviet build quality varied between samples, so test each body individually. Check the selenium meter still responds, as these cells fade with age, and run the shutter across its speeds watching for capping and off timing. Inspect any light seals and dampers for perishing, check the prism and screen, and test the film advance and rewind; expect sample-to-sample variance and inspect carefully before purchase.