Description Unique fisheye zoom is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 12.8-24mm equivalent focal length range. Constant f/4 maximum aperture maintains consistent illumination throughout the zoom range. Zoom allows you to change from a circular 180° fisheye look to a rectangular image. Both ends produce dramatic, creatively distorted imagery A ring-type Ultrasonic Motor (USM), along with optimized focusing algorithms and a high-speed CPU, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override. As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.
