Canon EF-S 10-22mm f/3.5-4.5 USM SLR Lens for EOS Digital SLRs 10-22mm wide-angle zoom lens with f/3.5-4.5 maximum aperture for EOS digital SLR cameras Superior AF performance and speed, with full-time manual focus with the turn of a ring Close focusing to 9.5 inches; fills the frame with subjects as small as 3.6 x 5.4 inches Circular aperture design produces natural highlights 1-year warranty