Overview

The Spiratone YS 28mm f/2.8 is a vintage manual-focus lens with a solid metal build and smooth focus ring, though the aperture ring can be stiff. Optically, it delivers decent center sharpness at f/2.8 but suffers from significant corner softness and chromatic aberration; stopping down to f/5.6 improves sharpness across the frame. It is best suited for photographers who enjoy vintage character and don't require edge-to-edge sharpness, or for use on crop-sensor cameras where corner issues are less pronounced.