Hoya 55mm ProND32 Filter
The PROND32 has a 5-stop light reduction equal to a ND optical density of 1.5. The ACCU-ND technology in the Hoya PROND filters yields a truly neutral colour balance that will not add any noticeable colour-cast to your images. The Hoya PROND series is aimed at the still photography and HDSLR video markets. The series provides 9 filters from two stop to 10 stop light reduction. The Metallic ACCU-ND coating on the PROND filters do not colour shift as you move from one density to the next, a common problem with other series of neutral density filters. Now you can set your white balance once and have the same colour balance even if you need to change filters due to changes in lighting, or for creative effect. The PROND filters use Hoyas exclusive clear optical glass that has a metallic ACCU-ND coating front and back to create the neutral density affect.