Improve your photography with the HOYA ND 8X PROND 67mm ND filter. The most notable feature of the ND (neutral-density) filter is that it partially blocks light coming into the lens, allowing you to work with longer shutter speeds. It also creates motion blur on moving objects. Another neat bonus of ND filters is that you can use a wider aperture for a more intense depth of field effect. The HOYA ND 8X PROND 67mm ND Filter has a 67 mm filter diameter, so it's compatible with many different lenses. The ND factor of 8 indicates a light transmittance of 13%, i.e. a 8x longer exposure time.