Olympus 50-200mm Zuiko Digital f/2.8-3.5 ED Lens for Digital SLR Cameras 50-200 millimeter f3.5-4.5 zoom lens for digital cameras (equivalent to 100-400 millimeter in 35 millimeter photography) Compatible with Olympus E1 and Evolt E300 cameras Designed to perfectly match the imager so light strikes the sensor directly, ensuring rich, accurate colors Three extraordinary dispersion glass elements to minimize color smear, chromatic aberration and fringing Reinforced by a new multi-coating process and new, reliable metal lens mount