The Canon EF-S 10-22mm f/3.5-4.5 USM is a small, lightweight zoom lens that provides ultra wide-angle coverage with excellent performance and optics built specifically for crop sensor cameras. Three aspherical lens elements and a Super-UD element assure image quality. Its ring-type Ultra Sonic Motor means fast and silent AF along with full-time manual focus override. Finally, because the lens can focus as close as 9.5" you can get extremely close to your subjects, allowing you to exaggerate the difference in size between a near object and its background. This lens is great for events, shooting in small spaces, fun group shots, and landscape shooting.