The Tokina Opera 50mm f/1.4 FF for Canon is a premium full frame lens that has an ultrasonic AF motor for fast and accurate focusing. The redefined optical design makes it compatible to Canon camera sensors as well. Its 50mm focal length provides a shallow but clear depth of field that is perfect for portraits. Meanwhile, its f/1.4 maximum aperture helps provide ample lighting for every shot especially during low-light situations. It also has a focus ring that turns in the same direction as Canon lens glasses. Compatible with Canon EF lenses, it is fortified with weather sealing for optimal performance even in harsh weather conditions. Product Features in Detail Precise focusing for high-end DSLR cameras Designed for full-frame format DSLR cameras, opera 50mm F1.4 FF adopts a ring-shaped ultrasonic motor for autofocus drive module. Weather sealing prevents from dust and moisture to come inside the lens body.