75-300mm telephoto zoom lens with f/4.5-5.6 maximum aperture for Canon SLR camerasMicro ultra-sonic monitor (USM) makes autofocusing quicker and quieter than beforeImproved zoom mechanism with silver on the front; 4.9-foot close focus distanceIdeal for shooting sports, portraits, and wildlife; lightweight frame weighs 16.8 ouncesMeasures 2.8 inches in diameter and 4.8 inches long; 1-year warranty