The Asahi Pentax Spotmatic, a pioneering Japanese camera, achieved immense success with over 4 million units sold between 1960 and 1977. Renowned for introducing stop-down Through-the-Lens (TTL) metering, the Spotmatics democratized light metering with an affordable and user-friendly system. Its intuitive design made it a favorite among both enthusiasts and professionals, solidifying its place as a prominent SLR during its era.