Zomei&reg; Ultra Slim Multi-Coated AGC Optical Glass 0.45x Wide Angle Lens - 52mm Only 11.3mm thickness, thus no vignetting when using this ultra slim wide angle lens. Magnification: 0.45X AF Original AGC Optical Glass from Japan. All Materials Used in this filter Meet the Requirements of European Union's standards of Environ Ment Protection-ROHS(Restrictions on Hazardous Substances).