The Mamiya-Sekor E 28 mm f/3.5 is a wide-angle multi-coated prime lens for 35 mm Mamiya E SLR cameras.
The lens is rather small and lightweight. It was manufactured for Mamiya Z-series cameras, the last 35 mm cameras produced by the company. Aperture settings are controlled in the automatic mode by means of a gilded contact pad on the bayonet mount. Aperture values are set on the lens body. Vignetting is visible when used on full frame cameras. The lens is rather sharp at the center and handles side light perfectly well.