Overview

The Minolta MC W.Rokkor-SI 28mm f/2.5 is a popular vintage wide-angle lens, noted for being the fastest 28mm SLR lens at its release. Optically, it delivers strong center sharpness and, after UV treatment to reduce yellowing from radioactive glass, performs similarly to the Nikon 28mm f/2.8 Ai-S, though corners lag behind and vignetting persists until f/5.6. Build quality is typical of its era, with a metal barrel and knurled focus ring. It suits enthusiasts seeking a fast, characterful wide-angle with unique radioactive glass, but those prioritizing corner sharpness may prefer alternatives.