Buy from Amazon.com : http://fave.co/1xuHqOU <br /><br />Sigma 100-300mm f/4 EX DG IF HSM APO Fast Aperture Telephoto Zoom Lens for Canon SLR Cameras<br /><br />Product Description : <br />Hyper sonic motor ensures a quiet high-speed autofocus <br />Inner focusing system allows attachment of petal-shaped hoods and filters <br />Special low dispersion glass for high image quality <br />Focal length 100 to 300 millimeters <br />Designed for Canon digital SLR cameras
