Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens for Canon EOS Cameras Ultra-compact 70-300mm telephoto zoom lens with f/4.5 to 5.6 maximum aperture Super-fast and silent autofocus with ring-type USM; 4.6-foot close focus distance Optimized to suppress ghosting and flaring; zoom lock button keeps lens secure Measures 3 inches in diameter and 5.6 inches long; 1-year warranty; accepts 58mm filters