CANON EF 22-55MM 1:4-5.6 USM LENS The Canon EF USM is one sharp lens with high-performance functionality. This zoom lens has a replicated aspherical lens element, making it small and lightweight. This Canon lens focuses silently and quickly. With a smooth and silent moving focus ring, this wide-angle zoom lens requires little effort to enjoy. The Canon EF USM also has full-time manual focusing. The AF and IS switches are recessed on this wide-angle zoom lens to prevent accidental changes as well. The developers and engineers on the Canon EF USM optimized the Super Spectra lens coatings to increase suppression of ghosting and flaring that can occur more frequently with digital cameras. This Canon lens has maximized its potential by increasing coatings, light absorption, and reducing reflection to deliver the most crisp and undistorted images that still supply a healthy natural balance of colors. This wide-angle lens is also well-known for being quite flare proof if in direct sun or a bright light is within the frame.