Olympus Zuiko 50-200mm f/2.8-3.5 Digital ED SWD Lens for Olympus Digital SLR Cameras 50-200 millimeter f2.8-3.5 zoom lens for digital cameras (equivalent to 100-400 millimeter in 35 millimeter photography) Features Supersonic Wave Drive (SWD) technology inside to provide quiet, ultra-fast autofocus speed Maximizes the E-3's high-speed autofocus capability Digital-dedicated design ensures high-definition performance with clear, crisp images from edge to edge Minimum shooting distance of just 1.2 meters throughout the zoom range Compatibility Tele Converter EC-14 Yes (AF/MF available),Tele Converter EC-20 Yes (AF/MF available)* AF shooting is possible using the center AF target,Extension Tube EX-25 Yes (MF available).