Circular-Polarizer Filter that Eliminates Reflected Light and Creates Sharp Colors! Why let scattered and reflected light ruin good shots of shiny surfaces, water, landscapes, etc? The C-PL filter eliminates reflected light on the surface of the subject and cuts down on undesired scattered light far more effectively than ordinary filters. The result? You get more vivid and clear-cut images. There is even an additional function that emphasizes contrast to reproduce blue sky more effectively.