The Canon EF 50mm f/1.2L USM Autofocus Lens is a peerless new standard lens featuring an ultra-large aperture for a narrow depth of field and soft background blur so loved by photographers everywhere. The EF 50mm f/1.2L USM is suitable for any shooting situation; its lens coating and construction are optimized to minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras. This high-performance, weather-resistant lens delivers all the superb image resolution and contrast you expect in a Canon L Series Lens. Features High-performance, weather-resistant standard lens AF with full-time manual focus 50mm focal length f1.2 maximum aperture; 72mm filter size UltraSonic Motor (USM)