Hoya is pleased to announce the new Hoya PRO ND line of neutral density filters with ACCU-ND technology. The ACCU-ND technology in the Hoya PRO ND filters produces a truly neutral colour balance that will not add any noticeable colour-cast to your images. The Hoya PRO ND 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 PRO ND 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.Neutral density filters are designed to reduce the amount of light entering your camera lens and should not have any other effect on the image. Reducing the amount of light allows for the use of wider apertures or slower shutter speeds for creative and dramatic effect in bright lighting conditions. All Hoya PRO ND filters have a low-profile one piece aluminium frame. The thin frame keeps the glass secure and parallel to the sensor while allowing it to be used with super-wide angle lenses.