NiSi Neutral Density Filters uniformly reduces the amount of light entering the lens. ND Filters can enable greater motion blurring and image detail by allowing a large aperture and a slow shutter speed. ND filters are also helpful when the contrast between the highlights and shadows is too high to get quality exposure. The NiSi 100mm range features 3 Stop, 6 Stop 10 Stop, 15 Stop, and 20 Stop. Find out more about the types of ND filters and when best to use them.