ND filter (Neutral density filter). ND filters are often used to achieve motion blur with long shutter speeds such as blurred water movements or to reduce the depth of field in very bright light. ND filters from B + W have very high optical quality and performance and completely without color stitching. The filter is available in several densities up to - 10 aperture steps. ND filters reduce the amount of light reaching the camera's sensor and allow the photographer to select a longer shutter speed or a larger aperture. Perfect for both portrait photography and landscape photography.