Zenit's metered SLR — the TTL with through-the-lens metering in M42 mount.
The Zenit TTL is a 35mm SLR from KMZ with through-the-lens metering — the TTL designation refers specifically to this metering capability, which was a feature highlight compared to earlier Zenit models with external meter cells. It uses M42 screw mount.
The Zenit TTL uses M42 screw mount, provides through-the-lens metering (a significant advancement in the Zenit line), and standard mechanical focal-plane shutter operation. Soviet construction quality typical of KMZ production.
The TTL metering capability provides more accurate exposure than the older external-cell approach. M42 mount compatibility gives access to the full M42 ecosystem. These cameras are sometimes found in working condition and usable with current 35mm film.
Test TTL metering accuracy against a known reference. Check M42 thread coupling. Verify shutter at all speeds. Inspect mirror and film transport.