Check the listing for details. NEW Hoya Cpl Digital Filter Circular Polarizer 55mm. Condition: New, Made in Japan. Listed at 10.98 USD. Light rays which are reflected by any surface can become polarised so polarising filters are used to select which light rays enter your camera lens. CIRCULAR PL filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. Digital multi-coated filters greatly reduce the appearance of lens flare and ghosting caused by reflections. Filters feature a black matte aluminum satin finish almite frame which reduces reflections. These filters are equipped with black rimmed glass to reduce the chance of light reflecting off the edge. Ultra thin filter frames to help avoid vignetting on super wide angle lenses are also designed to hold a lens cap. Filter cases are UV protected to further lengthen the life of filters.