The XL filter X121M Gradual Neutral Grey G2 Medium (ND4) (0.6) from Cokin is a high-quality screw filter specifically designed for use with lenses. This ND/grey filter reduces the amount of light hitting the sensor without affecting color balance. With a filter strength of ND4, it allows for even exposure, which is particularly beneficial in bright lighting conditions. The filter has a size of 0.6 millimeters and belongs to the color group grey, with the exact color designation being Neutral Grey G2. It is ideal for photographers who desire precise control over the exposure and depth of field of their shots. By using this filter, creative effects can be achieved, such as softening motion or creating atmospheric landscape images. The Cokin XL filter X121M is thus an essential tool for anyone looking to expand their photographic possibilities.