The EF 200mm f/2.8L II USM Lens from Canon is an EF mount lens that employs a rear-focus telephoto optical design that delivers outstanding picture quality throughout its entire focusing range. This lens also uses two ultra-low dispersion glass elements to ensure maximum image sharpness and accurate color fidelity. Canon's advanced ultrasonic autofocus motor (USM) and rear focusing design provide silent, smooth high speed autofocusing. Manual focus override allows you to fine tune focus in autofocus mode and focusing range limiter lets you adjust the range of focus to ensure faster autofocus speeds. Its minimum focus distance is 4.9'. The EF 200mm f/2.8 II is fully compatible with the Canon EF1.4x III and EF2.0x III extenders. A dedicated, detachable lens hood is supplied with the lens and a detachable, rotatable tripod collar is available as an optional accessory. Two UD Glass Elements Ultrasonic Autofocus Motor Focus Range Limiter Manual Focus Override