Overview

The Tominon 21mm f/3.5 Auto (also branded Chinon/Tomioka) is a manual focus M42 lens praised for superb contrast and good sharpness wide open, with minimal need for post-processing (TrueLoveOne). At f/8 it performs well, though flare can occur when shooting into the light (TrueLoveOne). Build quality is typical of the era, and it works nicely on full-frame cameras. It suits photographers seeking a compact, high-contrast ultra-wide for adapted use, but those sensitive to flare may need to be cautious.