K&F Concept Osmo Nano Dedicated CPL Filter Set (CPL) Polarizing Filter Lens Protection AGC Optical Glass High Transmittance Protect Filter Anti-Reflection Style: CPL Removes reflections with polarizing effect: This filter effectively removes reflections with its polarizing effect, making colors vivid and improving shooting quality. High transmittance AGC optical glass: Uses AGC optical glass with excellent transparency, achieving clear images without compromising image quality. 28-layer nano-coating: The 28-layer nano-coating, which is both water-repellent and anti-fouling, allows you to easily wipe off dirt and water droplets from the filter surface. Easy-to-install design: The screw-in design makes it easy to attach the filter. It is securely fixed and there is no worry of it coming off even during vigorous movement. Lens protection function: Protects the lens during shooting and protects it from scratches and dirt, allowing for long-term use.