Breathe new life into your photos with the HOYA ND 1000X PROND 72mm ND filter. The main reason why you should want one is that it reduces the light intensity coming through the lens, allowing you to work with longer shutter speeds. It also captures objects in motion and adds a blurred effect. Another neat bonus of all ND filters is that you can use a wider aperture for a striking depth of field effect. The HOYA ND 1000X PROND 72mm ND Filter has a 72 mm filter diameter, so it's compatible with many different lenses. The ND factor of 1000 indicates a light transmittance of 0.1%, so you can set up a 1000x longer exposure.