This is a HOYA PRO1Digital CPL filter. This one is 77mm. Made in Japan by Tokina Co.Ltd, for peace of mind. Light rays reflected on any surface can become polarized, so a polarizing filter is used to select the light rays that enter the camera lens. Using a circular PL filter allows you to remove unwanted reflections from non-metallic surfaces such as water and glass. It also makes colors appear more saturated, with higher contrast and clarity. This effect is often used to enhance the contrast and saturation of blue skies and white clouds. Hoya polarizing filters do not affect the overall color balance of the shot. Digital Multi-Coating Digital multi-coating filters significantly reduce the appearance of lens flare and ghosting caused by reflections. Black Anodized Frame The filter features a matte black aluminum satin finish anodized frame that reduces reflections. Black Rimmed Glass These filters are equipped with black rimmed glass to reduce the possibility of light reflecting from the edges. Low Profile Frame An ultra-thin filter frame that helps avoid vignetting with ultra-wide angle lenses is also designed to hold the lens cap. Knurled Edge Frame These filters are equipped with straight knurled edges for non-slip, easy installation and removal. UV Protection Case The filter case is UV protected to further extend the life of the filter. Can be used with all SLR cameras and mirrorless cameras, including Canon, Nikon, Sony, Panasonic, Pentax, and Olympus. Please check the filter diameter before purchasing. Kenko Pro1D CPL Kenko Tokina Usually ships in 1-3 days, but due to business trips for purchasing, there may be a period of about 5 days when we cannot ship, so it may take up to 5-7 days. If you are in a hurry, please check before ordering.