The Sigma 30mm f/1.4 ART DC HSM Lens has an angle of view equivalent to 45mm on a 35mm camera. It is a superb go-to lens for artistic photography on an APS-C format digital SLR. Offering a bright f/1.4 aperture and an angle of view extremely close to that of human vision this lens is ideal for many different types of photography. Features include: Hyper Sonic Motor (HSM); Super Multi-Layer Coating; Thermally Stable Composite Material; rear focus system; 9-blade rounded diaphragm; optional USB dock compatibility. Includes lens hood and padded carrying case.