Optical glass, precision grinding and polishing, high-definition imaging; Using multi-layer nano coating process, the lens has high-quality waterproof, oil-proof, anti-fouling and anti-scratch performance; Aviation aluminum frame material, logo engraved by laser laser without fading; The original lens will not be damaged during installation, and the filter can be changed at any time. The lens is made of nano coating process, and the color of the lens is different under sunlight and light.