What is the best canon zoom camera lens?

The Canon EF 70-300mm DO IS USM Lens is (arguably) the best Canon EF lens available. It has a focal length of 70-300mm which is excellent for sports and wildlife photography. It features Diffractive Optics (DO) which handle chromatic abrasion very well, Image Stabilisation which compensates for camera shake and a ring Ultrasonic Motor which allows for quick, quiet and accurate auto focusing. The Recommended Retail Price for this lens is $1,149.