Olympus M.Zuiko Digital ED 12-45mm F4 Pro Micro Four Thirds System 24-90mm (35mm Equivalent) Aperture Range: f/4 to f/22 1 DSA Element, 2 Aspherical Elements 2 HR, 1 Super HR, and 2 ED Elements ZERO Lens Coating MSC Autofocus System Weather-Resistant Construction Rounded 7-Blade Diaphragm