Z-Mount Lens/FX Format Aperture Range: f/2.8 to f/22 Four ED and Three Aspherical Elements ARNEO and Nano Crystal Coatings Stepping Motor AF System Programmable Control Ring Information OLED Panel and L.Fn Button Weather-Sealed Design, Fluorine Coating Accepts 112mm Filters and Rear Gels Rounded 9-Blade Diaphragm