Olympus M.ZUIKO DIGITAL ED 75mm f1.8 (Silver) Lens for Olympus and Panasonic Micro 4/3 Cameras High-Grade Portrait Lens (150mm 35mm equivalent) High-speed, single-focal-length telephoto lens optimized for studio, stage, indoor sports and portrait photography Nine-blade circular aperture unit 50mm diameter glass front; 10 lens elements in nine groups MSC (Movie & Still Compatible) autofocusing mechanism