Breathe new life into your photos with the HOYA ND 1000X PROND 55mm ND filter. The filter's main advantage is that it reduces the light intensity coming through the lens, allowing you to use a longer shutter speed. It also captures objects in motion and adds a blurred effect. Another neat bonus of ND filters is that you can use a wider aperture with the same ISO sensitivity and shutter speed for a striking depth of field effect. The HOYA ND 1000X PROND 55mm ND Filter features a 55 mm filter diameter, so it's compatible with many different lenses. The ND factor of 1000 indicates a transmittance of 0.1%, so you can set up an exposure a thousand times longer.