1. UV filter made of tough tempered glass, rendering HD quality pictures
2. 28 layers of nano-coating, effectively reduce the surface reflection of the filter
3. Double-side coating dust-proof, waterproof, anti-fouling, anti-mildew, better protection of the lens
4. 3mm ultra-thin frame design, can effectively prevent vignetting when used on a wide-angle lens
5. Aluminium alloy frame with knurled design, easy to disassemble