Take perfect photos with the HOYA ND 1000X PROND 52mm ND filter. The most notable feature of the ND (neutral-density) filter is that it reduces the light intensity coming through the lens, allowing you to use a longer shutter speed. It also smooths out moving objects, such as flowing water. Another great feature of all ND filters is that you can use a wider aperture with the same ISO sensitivity and shutter speed for a stunning depth of field effect. The HOYA ND 1000X PROND 52mm ND Filter has a 52 mm filter diameter, making it compatible with a wide range of different lenses. The ND factor of 1000 indicates a transmittance of 0.1%, so you can set up an exposure a thousand times longer.