Item Specifics: Brand Name: Zomei Type: Polarizing Filter Shape: Circular Caliber: 40.5mm; 49mm; 52mm; 55mm; 58mm; 62mm; 67mm; 72mm; 77mm; 82mm; 86mm Weight: 65g(40.5mm); 68g(49mm); 70g(52mm/55mm/58mm); 75g(62mm/67mm); 100g(72mm); 105g(77mm/82mm) Product Description: Wide-angle lens compatible ultra thin frame. Polarization rate up to 99.9% and transmittance up to 99.7%. Made with no compromise. Glass mounted with high pressure press technology. ZOMEI ultra thin CPL adopts imported optical glass lens in line with EU-ROHS environmental protection standard limit of harmful substances, do not contain harmful material, lens edge blackening process, minimize spot and various unknown reflection light source. Light rays which are reflected by any surface can become polarized so polarizing filters are used to select which light rays enter your camera lens. CIR-PL filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also enable colors to become more saturated and appear clearer with better contrast. This effect is often used to increase the contrast and saturation in blue skies and white clouds. Package Including: 1*Zomei Slim CPL Circular Polarizing Filter