Zomei 0.45x Wide Angle Lens Ultra Slim Multi-Coated AGC Optical Glass Pro MC AF Digital Wide Converter - 40.5mm This wide angle lens is used high quality aviation aluminum: material of frame is used high quality aviation aluminum, which is corrosion resistance,it has strong flexibility and high stability, very good magnetic shielding and thermal conductivity. Stable performance and not easy to deformation, it feels good based on black delicate frosted frame. Very slim design makes it can be taken very conveniently, and can reduce body load, reduce camera motor burden. The wide angle lens is used high quality optical glass material, comply with the requirements of the photographic imaging, ensure high transmittance, image quality color reduction close to real color, it has very good optical properties, and it is the preferred material for optical glass. Black matte film frame: the wide angle lens' frame is used environmental protection process, it is used delicate matte finish, which can effectively avoid stray light come in, and result in as low as possible to affect imaging. Lay on black for edge glass: glass edges are all used Germeny extinction paint to do black lay on. Slim filter frame: It is used slim rame, which is suitable for wide angle lens, it matchs ROHS standard, there is thread at the front of frame which can install lens cap and accoressry at any time.