The Tokina 11-16mm f/2.8 AT-X Pro DX-II is designed for Canon crop-sensor cameras. Key features include: Canon crop-frame only Great for landscape photography Fast, accurate autofocus with full-time manual override 11.81-inch minimum focusing distance Great for Landscape Shooting. It offers high-quality images with relatively low distortion and good corner sharpness. The ultra-wide angle makes it perfect for sweeping landscapes, while its fast f/2.8 aperture allows you to continue shooting even when the light gets low. Its 11.81-inch minimum focusing distance means that subject isolation at f/2.8 is quite noticeable. Fast, Accurate Autofocus. Its multi-layer coating improves reflections, while its built-in silent autofocus motor makes the lens faster and quieter during use. Its one-touch focus clutch mechanism, which is carried over from the Pro DX, allows quick transition from autofocus to manual focus.description