The Canon 35mm f/1.4 is an L-series, high-performance, wide angle lens. The large f/1.4 maximum aperture provides excellent low-light performance and depth of field control. This lens gives a 63° angle of view on a full-frame camera body.
Fast Aperture: The large aperture of this lens helps give you fast shutter speeds in available light and excellent depth-of-field control.
USM: Canon USM ultrasonic autofocus is faster and quieter than mechanical autofocus systems.