DT 50mm F1.8 SAM is a compact, lightweight, high-quality lens with a 50mm focal length (35mm format camera equivalent: 75mm) that is ideal for portraits and general-purpose photography. It is designed exclusively for use with a digital SLRs incorporating an APS-C type image sensor. Compact and weighing only 170g (approx.), the DT 50mm F1.8 SAM reduces the need to carry heavy gear when shooting, yet offers crisp, natural imaging that is ideal for everything from portraits to scenic photos and snapshots. It also boasts a large, bright F1.8 maximum aperture and a circular aperture mechanism for smooth background defocusing. Distinguished by ultra-sharp imaging across the focal plane, the DT 50mm F1.8 SAM also features a minimum focusing distance of 0.34m and a maximum magnification ratio of 0.2. In addition, a developed Smooth Autofocus Motor (SAM) is used to drive the focusing lens group. more info