Become a better photographer with the HOYA ND 1000X PROND 52mm ND filter. The most notable feature of the ND (neutral-density) filter is that it reduces the amount of light passing through the camera lens, allowing you to use a longer shutter speed. It also creates beautiful photos with ghostly, blurred lights or water. Another great feature of all ND filters is that you can use a wider aperture for a striking depth of field effect. The HOYA ND 1000X PROND 52mm ND Filter features a 52 mm filter diameter, making it compatible with a wide range of different lenses. The ND factor of 1000 indicates a light transmittance of 0.1%, so you can set up a 1000x longer exposure.