Canon EF 70-200mm f/4 L IS USM Lens for Canon Digital SLR Cameras 70-200mm telephoto zoom lens with f/4 maximum aperture for Canon digital SLR cameras Fluorite UD lens elements produce excellent optical performance in resolution and contrast, Closest focusing distance : 3.94 feet, Focal length: 70-200mm Ring-type ultra-sonic monitor (USM) for quick and quiet autofocusing; lightweight construction Image Stabilizer provides up to 4 stops of shake correction; water- and dust-proof construction Measures 3 inches in diameter and 6.8 inches long; Weight : 1.675 pounds (lens only) ; 1-year warranty