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 design ...
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The ED (Extra-low Dispersion) and two aspherical lens elements correct aberrations without increasing lens dimensions. The circular aperture diaphragm enables beautiful defocusing - one of the big advantages of this lens.