The Urth 40.5mm ND8 (3 Stop) lens filter is a high-quality screw-on filter designed specifically for photographers looking to expand their creative possibilities. With a diameter of 40.5 millimeters, this neutral density filter is ideal for a variety of lenses. The ND8 filter reduces the amount of light hitting the sensor by three stops, allowing for longer exposure times or wider apertures without overexposing the image. This is particularly useful in bright environments or when capturing moving subjects, as it helps create motion blur or control depth of field. The filter is easy to attach and remove, providing flexible handling while shooting. With its robust construction and high optical quality, the Urth ND8 filter is a valuable addition to the gear of both photography enthusiasts and professionals alike.