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The Olympus M.Zuiko Digital ED 100-400mm F5.0-6.3 IS is a brand new super telephoto lens for the Micro Four Thirds mirrorless camera system. Offering an effective focal range of 200-800mm in 35mm terms, the Olympus 100-400mm is aimed at bird, wildlife and sports photography enthusiasts. Read our Olympus 100-400mm review now, complete with full-size sample photos.