Overview

The Mamiya-Sekor E 28 mm f/3.5 offers very good center sharpness at all apertures, but corner sharpness is notably weaker than the SMC Pentax 28/3.5, especially at wider apertures. Chromatic aberrations are also less well corrected. Build and handling are not discussed, but the lens handles direct sunlight reasonably well, with contrast loss affecting a larger area around the sun. It suits users who prioritize center sharpness and can accept softer corners, or those seeking an affordable wide-angle for general use.