ZoMei 49mm HD 18 Layer Super Slim Multi-Coated Circular Polarizer CIR-PL CPL Lens Filter High quality Germany Schott Glass, 18 layer coating, top transmittance and polarization rate Ultra slim frame design, only 4.55mm thickness, avoid dark corner, suitable for wide-angle lens Increase the color saturation, makes the color of some of these objects more vibrant Manage reflections, or suppress glare from non-metal surface, such as water and glass Protect the lens, water resistant, anti-oil, dust free, scratch resistant