Laowa Venus Optics 7.5mm f/2 MFT Lens for Micro Four Thirds (Ultra-Light Version, Black) features Micro Four Thirds System, 15mm (35mm Equivalent), Aperture Range: f/2 to f/22, Lightweight Version for Aerial Use, Rectilinear Lens Design, Two Aspherical and Three ED Elements, Frog Eye Coating, Manual Focus Design, Seven-Blade Diaphragm.