The Cinema 11-16mm T3.0 with Canon EF Mount Mount is a wide-angle zoom lens for Super-35 sized sensors The lens uses the same distortion-free design and optical performance of Tokina's 11-16mm f/2.8mm DSLR lens, but puts it into an all-metal housing optimized by the addition of a par-focal design that allows you to maintain focus on your subject while zooming. Ultra-wide angle T3.0 zoom lens 9-blade aperture diaphragm 77mm filter diameter Min. focus distance of 13.78"