The ZUIKO DIGITAL ED 50-200mm f2.8-3.5 SWD is a high-performance super-telescopic zoom lens that features for the first time the SWD (Supersonic Wave Drive) autofocusing system and covers a zoom range equivalent to 100 to 400 mm of a 35 mm camera lens. ED lens elements are used extensively to correct the color blurring that can occur when telescopic lenses are extended to their maximum focal length while the digital-dedicated design ensures high-definition performance with clear crisp images from edge to edge. Close-up shooting capability is also superb with a minimum shooting distance of just 1.2 meters throughout the zoom range. Autofocusing is powered by Olympuss breakthrough SWD enabling this lens to achieve an AF speed about two times faster* than our previous ED 50-200mm f2.8-3.5 model. The ideal partner for the concurrently released E-3 camera this lens maximizes the E-3s high-speed autofocusing capability. The lens autofocus is powered by Olympus breakthrough Supersonic Wave Drive Technology (SWD). Designed to be the worlds fastest AF system this extraordinary autofocus drive provides both high speed and high precision while operating with lower noise than ever. Optimized for use with the E-3 Digital SLR this lens enables the camera to demonstrate the full power of its high-speed capability providing the fastest autofocus available in the world using a standard zoom lens. ? Key Features: 50-200mm f2.8-3.5 Telephoto High-Performance Lens with 4x super-telescopic range covering a zoom range equivalent to 100 to 400 mm Three ED lens elements are used to correct the color blurring noticeable with telescopic lenses at maximum. Best-in-class f2.8-3.5 brightness and high picture quality combine to ensure high imaging performance with improved sharpness and contrast all over the zooming range. An improved lens coating reduces glare when shooting against the light and minimizes ghosts and flare. In addition with coverage that extends to the super-telescopic domain