A neutral density (ND) filter uniformly reduces the amount of light entering the lens. The ND filter is helpful when the contrast between the highlights and shadows is too high to get a quality exposure. The ND Filter also can enable greater motion blurring and image detail by allowing a large aperture and a slow shutter speed. The ND64 6 stops ND filter is generally used during the golden hour to create exposures of 1-2 minutes for smooth water or clouds. A 6 Stop is also great for capturing dynamic water while retaining some texture before the golden hour.