The Canon 0345B002 EF 70-300mm f/4-5.6 IS USM Telephoto Zoom Lens has been developed to meet the high-performance standards that today's photographers demand. Improved Image Stabilizer technology provides up to three stops of "shake" correction, and the "Mode 2" option stabilizes images while panning with a moving subject. This telephoto lens has faster autofocus, and overall the lens is lighter and has a smaller diameter than the original. The zoom ring can be locked at the 70mm position, making this powerful lens easy to transport.