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