Overview

The HI Topcor 50mm f/2.8 is a Tessar-type lens (4 elements in 3 groups) from the Topcon HI series, introduced in 1976 as an entry-level kit lens. Optically, it likely has noticeable image quality trade-offs due to element focusing. It lacks an aperture ring, as aperture was controlled by the camera, and the filter threads rotate on focusing. Build is typical for the system; it is compatible with Topcon UV bodies but some HI lenses have restrictions. This lens suits users seeking a compact, affordable standard lens for adapted use, though its slow aperture and lack of aperture ring may be limiting.