Overview

The Olympus OM Zuiko MC Auto-W 21mm f/2.0 is a compact, fast ultra-wide-angle lens introduced around 1978/79, notable as the world's first 21mm f/2.0. Optically, it delivers excellent center sharpness wide open, with slightly soft edges that improve significantly by f/4–5.6, offering great detail and contrast. Build quality is exquisite and jewel-like, with a remarkably small size for its speed. It suits photographers who prioritize portability and fast aperture in a wide-angle lens, though it commands a high price.