Item Type: Lens Filter Material: Aluminum Alloy + Optical Glass Application: for AIR 2S Weight: Approx. 22g/0.8oz Package List 1 x Lens Filter 1The lens is made of highquality optical glass, highdefinition grinding treatment, and the frame is made of aviation aluminum. 2The lens has waterproof, oilproof, antifouling, and antiscratch properties, so that water droplets and oil can not be absorbed on the surface, making it easier to clean and maintain. 3The multilayer nanometer coating process makes the surface of the lens form a protective layer similar to the surface of the lotus leaf. 4NDPL filter can obtain more freedom to control the aperture and shutter, bring more exposure means and creative space for photography creation, and effectively prevent overexposure. 5NDPL filter, the number behind ND represents the ability of the ND lens to block light, and has a PL polarization composite function to eliminate harmful polarized light