High-quality telephoto zoom with incredible sharpness. The Canon EF 70-200mm f/2.8L USM is one of the finest telephoto zoom lenses in the EF line, 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. Compatible with Extender EF 1.4x II and 2x II.
Key Features: Superb Autofocus
The lens USM motor employs ultra-sonic frequency vibrations to drive autofocus with unrivalled speed and near-silent operation. Good holding torque stops the lens with precision and accuracy, the instant it arrives at the correct focus point and without overshoot. f/2.8 Throughout the Zoom Range
The EF 70-200mm f/2.8L USM offers the highest possible optical quality with no change in aperture over the full focal range of the lens. This allows photographers to set exposure at the widest aperture and zoom all the way through to 200mm without having to decrease shutter speed.