The Urth 72mm ND8 128 (3 7 Stop) Variable ND Lens Filter is a high-quality screw filter designed specifically for photographers and videographers who desire precise control over the exposure of their shots. With a diameter of 72 millimeters, this filter is suitable for a wide range of lenses and allows for the reduction of the amount of light hitting the sensor. The ND filter (Neutral Density) offers a variable density of 3 to 7 stops, enabling flexible adjustments to different lighting conditions. This is particularly useful when capturing moving subjects or using longer exposure times to achieve creative effects. The filter is easy to mount and remove, making it a practical accessory for any photo or video equipment. With its robust construction and high optical quality, the Urth ND filter ensures that image quality is not compromised while achieving the desired exposure effects.