Designed with professional landscape photographers in mind, this 100 x 150mm Master Series Soft Edge Graduated 0.6 ND Filter from Benro has a 4x filter factor that provides a 2-stop exposure reduction in selected areas. This specific model features a soft edge in its center, fading gradually from completely clear to darkened as we move towards the top. This allows the filter to keep bright skies under control without creating a line in the image, making it ideal for pictures without a clearly defined horizon line.