Canon zoom lens

This is one of the finest telephoto zoom lenses in the EF line, it is comparable to a single focal length lens. It has four UD-glass elements to correct chromatic aberrations. Its constant f/2.8 maximum aperture and superb image quality make it one of the most popular professional SLR lenses in the world. In addition it's compatible with Extender EF 1.4x II and 2x II.