Digital photography demands more than the traditional optical designs of film lenses. Photographers want to be able to shoot not only stopped down but with the aperture wide open and know they will get sharp, detailed edge-to-edge sharpness. The Olympus E-System and Zuiko Digital LensesTM are designed to meet the everyday needs of professional photographers. With digital specific lens designs and unrivaled optical elements, unsurpassed image quality is achievable in an interchangeable lens SLR system, no matter what aperture you choose. And an incredibly compact, lightweight design - based on the innovative Four Thirds System - provides you with the most versatile, high-performance interchangeable lens system you've ever experienced.