Versatile Normal-Length Prime. The Sigma 45mm f/2.8 DG DN Contemporary’s compact build and versatile focal length make it ideal for a broad range of shooting situations, particularly those in which you want your subject to stand out. The fast f/2.8 aperture lets you shoot in low light while offering excellent focus control when using shallow depth-of-field techniques, while the rounded seven-blade diaphragm lets you render smooth bokeh. Using an APS-C camera? You’ll get a focal length equivalent to 68mm.

Stepping Autofocus Motor. The stepping motor provides fast, smooth, and nearly silent autofocus operation for stills and video alike. You also get full-time manual-focus override for precision adjustments.

Advanced Optics. This lens’s seven-group/eight-element optical design minimizes spherical aberrations and fringing to help produce soft, rounded bokeh while enhancing the three-dimensional appearance of your subject.

High-Quality Build. The Sigma 45mm’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.