B&W 66025844 B&W B & W 77MM Slim-Line Multi-Coated Mrc Filter Kaesemann Circular Polarizer.Filters solve a great variety of tasks in photography. They match the illumination to the type of color film.They enhance contrast and colors. They attenuate the amount of incoming light.They can make the structures invisible to our eyes visible to the film.They offer numerous optical effects for creative composition or for abstractions. Filters make it possible to achieve photographs that simply could not be made without them, and many of them could not be accomplished with subsequent digital image manipulation. B+W therefore provides digital imaging filters in diameters and designs suitable for lenses on most current digital cameras and camcorders. Computer-controlled manufacturing processes safeguard the high level of B+W quality. In order to deliver optimal image quality and to safeguard the high demands of lens/camera manufacturers, B+W glass filters are manufactured virtually exclusively from glass supplied by the German Schott Group.