Buy from Amazon.com : http://fave.co/1CsnS3Q <br /><br />Canon EF 200-400mm f/4L IS USM Extender 1.4x<br /><br />Product Description : <br />High performance L-series super-telephoto zoom with built-in 14x extender 280-560mm f56 makes it ideal for sports and wildlife photography <br />One fluorite and four UD lens elements provide excellent correction of chromatic aberration throughout the entire zoom range delivering high-quality images with high resolution and contrast <br />Inner focusing ring USM a high-speed CPU and optimized AF algorithms for fast and accurate autofocusing <br />Optical Image Stabilizer provides up to four shutter speed stops of correction <br />Three image stabilization modes standard panning and during exposure only provide excellent results for a wide range of shooting situations
