Zenit's late TTL M42 SLR — the 122, stop-down CdS with LED, fully mechanical shutter, 1990.
The Zenit 122 is a 35mm film SLR made in the Soviet Union and then Russia by KMZ from around 1990, one of the last of the long Zenit line and a development of the TTL-metered Zenit 12 family. It was produced with a more plastic-bodied construction as production continued past the Soviet era, remaining a very cheap mechanical SLR on the market into the 1990s.
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 Zenit 122 has a battery-powered CdS through-the-lens meter with an LED indication in the finder, operated stop-down. Exposure is manual; the shutter is entirely mechanical and fires without a battery, while the meter needs a cell to read.
The Zenit 122 suits students, beginners and budget users wanting a cheap M42 SLR with TTL metering and an LED finder readout. It is lighter and more plastic than the older all-metal Zenits, which some find flimsier, and the TTL meter is the main convenience; the limited shutter range and lack of automation remain the constraints of the basic design.
On the used market, Soviet and Russian build quality varied between samples, so test each body individually. Check the CdS meter and its LED respond with a fresh battery, run the shutter across its speeds watching for capping and off timing, and inspect any light seals and dampers for perishing. Check the prism and screen, and test advance and rewind feel; the plastic parts can wear, so expect sample-to-sample variance and inspect carefully before buying.