Telephoto zoom lens - 70-300mm focal length, fast f/4-5.6 aperture Image Stabilizer gives equivalent effect of a shutter speed three stops faster during hand-held shooting UD lens elements to effectively correct aberration for high quality throughout the zoom range Closest focus distance of just 1.5m at all zoom focal lengths This lens delivers over 4x telephoto zoom for Canon autofocus SLR Digital-camera and Film-camera models. AF is super-fast and silent with a ring-type USM, and it focuses down to 4.6 feet without rotating the front element. A new zoom lock button keeps the lens safe and secure when not in use or used at the widest lens perspective. Circular aperture producing attractive background defocus Micro USM and new AF algorithms for fast and quiet autofocus Only environmentally friendly lead-free glass used in lens construction F stop range 4.5-32 / 5.6-38 Closest Focusing Distance 1.4m / 4.6 ft. 4.2x zoom magnification Accepts 58mm size filters Dimensions (Length x Diameter) 3.9 x 3.2 / 99.9 x 82.4mm Weight 25.4 oz. / 720g