EF-S 15-85mm f/3.5-5.6 IS USM extra wide-angle to telephoto zoom lens with 35mm equivalent of 24-136mm * compatible with Canon APS-C format digital SLR cameras * Image Stabilization allows in-focus shots with longer exposure times (up to four stops slower shutter speed) * ring-type Ultrasonic Motor for fast, silent autofocus * available full-time manual focusing (automatically overrides autofocus) * minimum focus distance: approximately 14 inches * lens is 3-7/8 long, 3-1/4 in diameter * more info