When used with EOS bodies featuring APS-C or APS-H sensors, the lens produces a more traditional, full frame fisheye view. A zoom-lock mechanism on the lens body allows the range to be limited to the focal length that ensures the best possible full-frame view without unsightly vignetting around the edge. 'C' and 'H' markings can be found next to the zoom operation ring, indicating the wide-angle zoom position where vignette-free shooting is possible with either sensor. For filmmakers and photographers who want the look and feel only possible with extreme wide angle and fisheye photography, the Canon EF 8-15mm f/4L Fisheye USM is a world-class choice.
With its Ultra-Sonic Motor (USM), and Floating Focus System the lens offers fast auto focus even down to a close 6.2" (0.16 m). The lens features UD glass for suppression of chromatic aberration, a Subwavelength coating for reduced ghosting, a Fluorine coating that keeps soiling, smears and fingerprints to a minimum, has full-time manual focus for instant switching from AF to Manual operation, and is built to the standards of the amazing Canon L-series of lenses. The rear gel holder holds up to 3 pre-cut filters. This means the finest optics, the best construction and the best performance available, all in a lens designed to stimulate creativity and deliver stunning images every time.