Let Canon recommend the product that best suits your needs
A superb lens that covers nearly every professional wide-angle task. Outstanding optical performance comes from three Aspherical lens elements, and (for the first time ever in an EF wide-angle zoom lens) two Ultra-low Dispersion UD elements. Weather-resistant construction, a rear gel filter holder, close-focusing to 11 inches (0.28m) and a circular diaphragm are among its many highlights.