The superior-quality EF 35mm f/1.4L USM Lens from Canon features a brilliant maximum aperture of f/1.4, along with the superior natural image quality of Canon L-series lenses. Such a wide aperture is ideal for low-light imaging and for exacting depth of field control. An advanced floating mechanism and aspherical lens element achieve extremely sharp, distortion free pictures from infinity to its closest shooting distance of 1.0'. With a ring-type ultrasonic autofocus motor ;(USM) and ;rear focus, autofocus is fast and virtually silent. A wide focusing ring provides comfortable manual focus, and the filter ring remains stationary for ease of use with polarizers and other special effects filters. Full time manual focus override enables precise manual focus even when in AF mode.