Hoya Circular Polarizers allow you to eliminate or attenuate the reflections that light creates on non-metallic surfaces. They are therefore particularly suitable for shots taken through glass. Many experienced photographers also use the Circular Polarizer to obtain images characterized by more saturated colors and greater contrast. The Hoya Standard Series Circular polarizers are available in all diameters between 37mm and 82mm. They are therefore also available in the proper diameters of the optics of the new "mirrorless" digital photographic systems. All filters are in Slim mount, which avoids the occurrence of vignetting when used with extreme wide angle lenses.