Fast f/1.4 Aperture Wide Angle. The combination of normal focal range and fast aperture makes this lens ideal for portraiture where subject-background isolation is needed. This also makes it a perfect choice for shooting in low light. Being a standard 50mm focal length, the Sigma 50mm f/1.4 DG HSM A1 is useful for just about any type of photography.

High-Quality Optics. As a part of Sigma’s Art lens line, this lens goes through Sigma’s rigorous A1 testing to ensure high image quality. It features a molded glass aspherical element to eliminate sagittal coma flare, vignetting, and color blur throughout the aperture range. Three Special Low-Dispersion glass elements correct for axial chromatic aberration while the Super Multi-Layer Coating minimizes ghosting and lens flare. All this is incorporated into a floating optical design that provides high-detail rendering and a 1.3-foot minimum focusing distance.

Hyper Sonic Motor Autofocus System. Provides fast, smooth, and quiet operation in a wide variety of shooting situations. You can also manually override the autofocus motor at any time by rotating the focusing ring, giving you quick fine-tuning ability.

Dock Compatible. As part of Sigma’s Global Vision series, this lens is compatible with the Sigma USB Dock for Canon EF Lenses (separate rental item), allowing you to adjust certain parameters through the Sigma Optimization Pro software.