Promaster Spec. 7 28-70 F3.9-4.8 Lens - Minolta MD Manual Focus Mount Zoom Range: 28-70mm Aperture Range: f/3.9-4.8 Weight: 10.7 oz. Diameter x Length: 2.54'' x 2.60'' Filter Size: 55mm Not compatible with Minolta or Sony DSLRs.