K&F Concept Filter Circular Polarizing Filter Waterproof with 24 Multi-Layer Coatings CPL Polarizers Filters 1. Effectively reduce or eliminate the reflection of non-metallic surfaces, improve the clarity of the picture and effectively increase the colour saturation; 2. Imported optical glass, 24-layer nano-coating process 3. Double-sided polishing process, showing high-definition picture quality; 4. The anti-reflection green film can effectively reduce the reflection on the surface of the filter; 5. Multi-layer nano-coating, dust-proof, waterproof, anti-fouling, anti-mildew to protect the lens; 6. Ultra-thin frame design can effectively prevent vignetting when using a wide-angle lens; 7. The frame knurling design is convenient for disassembly and assembly. New and old packages are sent randomly HD optical glass 5.
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