Micro Four Thirds System 40mm (35mm Equivalent) Aperture Range: f/1.4 to f/16 11 Elements in 10 Groups 1 Super ED, 3 ED, 2 Super HR Elements 2 Aspherical Elements ZERO Zuiko Extra-Low Reflection Coating Movie & Still Compatible AF System Weather-Sealed Construction Rounded 9-Blade Diaphragm