The Urth 37mm ND2 400 (1 8.6 Stop) Variable ND Lens Filter is a high-quality neutral density filter specifically designed for photographers and videographers who seek precise control over the exposure of their shots. With a filter strength of ND400, this filter allows for a reduction in light transmission of up to 8.6 stops, making it ideal for creating creative effects in bright lighting conditions. The screw filter has a diameter of 37 millimeters and can be easily mounted onto the lens. By using this filter, users can achieve longer exposure times and a reduced depth of field, resulting in stunning images with smooth motion blur. The filter is versatile and suitable for both landscape and portrait photography. Its robust construction ensures a long lifespan and protects the lens from dust and scratches. The Urth ND2 400 filter is therefore an essential tool for anyone looking to expand their photographic possibilities.