Overview

The SMC Pentax-A 28mm f/2.8 is a compact, all-metal manual focus wide-angle lens (7 elements in 7 groups) praised for its solid build and smooth handling, though the aperture ring's mixed half- and full-stop clicks can be confusing. Optically, it offers excellent center sharpness and even illumination even wide open, but corners and sides are soft at f/2.8, with some coma that clears by f/5.6. It suits Pentax users seeking a compact, high-value normal lens on APS-C and outperforms third-party alternatives, though not top-tier Nikkors.