The Urth 37mm ND8 128 (3 7 Stop) variable ND lens filter is a high-quality neutral density filter designed specifically for photographers and videographers who seek precise control over the exposure of their shots. With a diameter of 37 millimeters, this screw-on filter is easy to mount and suitable for a variety of lenses. The ND8 128 filter allows for a reduction of light by up to 7 stops, which is particularly useful for creating creative effects in bright lighting conditions, such as motion blur or achieving a shallower depth of field. The variable ND function offers flexibility, as the user can adjust the density of the filter to achieve the desired exposure settings. This filter is ideal for landscape, portrait, and architectural photography, helping to enhance image quality by minimizing unwanted reflections and preserving color balance. The Urth ND filter is a valuable addition to any photographic equipment.