Fast-Aperture Normal-Length Prime. The Sigma 50mm f/1.4 DG DN Art’s fast f/1.4 aperture makes it ideal for shooting in low light, achieving shallow depth of field, and providing ample subject-background separation. Its focal length is ideal for portraiture, landscapes, reportage, and street photography. The rounded eleven-blade diaphragm helps produce large, pleasing bokeh. Using an APS-C sensor camera? You’ll have a focal length equivalent to 75mm.

Fast, Precise, and Nearly Silent Autofocus. The 50mm’s autofocus system uses a High-Response Linear Actuator motor to provide fast, smooth, and nearly silent focusing for stills and video alike. An AF/MF switch and aperture-ring click switch allow for immediate manual-focus override when you need to make minute adjustments. A built-in Autofocus-Lock button can be assigned additional functions, giving you more options and capabilities, while a Manual Focus Lock feature disables the focus ring entirely.

Advanced Optical Design. This lens’s eleven-group/fourteen-element optical design includes three aspherical elements and one Special Low-Dispersion element to minimize chromatic aberrations, distortion, and vignetting while providing maximum sharpness, color accuracy, and clarity. The elements have a Super Multilayer Coating that helps prevent flare and produce contrasty, color-neutral images, even when you’re shooting in backlit conditions.

High-Quality Build. The Sigma 50mm’s Thermally Stable Composite build is dust- and splash-resistant so that you can use it in adverse conditions. It also boasts a brass bayonet mount for maximum durability. An included petal-type hood helps to prevent flare and protect the lens’s front element.