Canon EF 100–400mm f/4.5–5.6L IS USM telephoto zoom features built-in image stabilization for handheld shooting in low light, making it a favorite for sports and wildlife photography. Ring-type USM autofocus with internal focusing delivers fast, smooth, and quiet operation. A floating lens system corrects spherical aberration and coma at varying focus distances, maintaining sharpness throughout the zoom range. The optical design uses 17 elements, including a large fluorite element and a UD element to correct chromatic aberrations and ensure accurate color reproduction. FT-M allows instant manual focus override. This is a push-pull zoom lens, with zooming achieved by extending the front barrel rather than rotating a ring. Included: Canon EF 100–400mm f/4.5–5.6L IS USM lens, front and rear caps, 77 mm UV filter, hood, tripod collar, pouch.