1[Nano Coating Process] With multi layer nano coating process, the lens has waterproof, oil proof, antifouling and scratch resistant properties 2[Waterproof and Scratch Proof] Adjusting the rotating lens can achieve the best anti reflection effect and protect the lens from dust scratches 3[CPL Filter] CPL is a widely used filter, which eliminates unnecessary reflection and can eliminate most reflection on non metallic and non spherical surfaces 4[Improve Clarity] Improve the clarity and expressiveness of the image and increase the color concentration 5[Clearer Shooting] Generally used for landscape photography. When shooting, the sky is bluer, making the whole picture clearer and more transparent Item Type: Camera Lens Filter Material: Aluminum Alloy , Optical Glass Interface: Approx. 67mm / 2.6in , Approx. 72mm / 2.8in Optional Applicable Model: Approx. 67mm / 2.6in, Approx. 72mm / 2.8in Interface Lens 1 x CPL Filter 1 x Storage Box When using polarizer, due to the need to rotate the filter, the light shield should not be used; Try to put the camera in the shadow.