The EF 70-200 mm. f/2.8 L USM is a professionally quality fast-aperture telephoto zoom lens popular with wildlife & sports photographers as well as those shooting weddings & portraiture. Features High performance L-series telephoto zoom lens. Constant f/2.8 maximum aperture Four UD lens elements 1.5 m. minimum focussing Water & dust resistant Eight-bladed aperture Ring-type USM AF motor The professional photographers telezoom lens. A zoom as good as a prime lens. One of the finest telephoto zoom lenses in the EF line optically comparable to a prime lens. Four UD-glass elements to correct chromatic aberrations & multiple zoom groups allow internal focusing resulting in high image quality throughout the zoom range. Compatible with Extender EF 1.4x & 2x. Fast constant maximum aperture. Shooting in low-light conditions is possible thanks to the lens fast maximum aperture of f/2.8 which stays constant throughout the zoom range. Such an aperture also gives control over depth of field. L-series quality. The L-series is Canons flagship professional lens range representing the best in precision-designed EF optics. L-series lenses combine superior performance with superlative handling & are resistant to dust & moisture. Ultrasonic focusing. A ring-type ultrasonic motor drives autofocus extremely quickly & in near silence. Excellent holding torque ensures the point of focus is reached accurately without overshooting. Furthermore full-time manual override is available making it possible to adjust focus without leaving AF mode. Super Spectra coating. Super Spectra coatings ensure accurate colour balance & enhance contrast. They also reduce flare & ghosting a common problem caused by light bouncing off a cameras sensor. Accessories. A lens hood & a soft case are included. Features Zoom Type Zoom Lens.