Canon EF 85mm f/1.8 USM Medium Telephoto Lens for Canon SLR Cameras - Fixed 85mm standard lens with f/1.8 maximum aperture for Canon SLR cameras,Lens Type:Telephoto Zoom Lens Ring-type ultra-sonic monitor (USM) brings subject quickly into focus, Focal length: 85mm, Closest focusing distance: 2.8 feet Natural angle of view and perspective is ideal for portraits and natural images Designed to produce beautiful background blur; weighs 15 ounces Measures 3 inches in diameter and 2.8 inches long; 1-year warranty. Refer User manual for troubleshooting steps. Lens not zoomable