The Ice 77mm Soft-Edge Graduated Neutral Density 0.9 Filter helps darken specific areas of an image while allowing for a normal, unaffected exposure in the other parts. The filter is densest at the edge and tapers to clear by the middle, with a soft-edged line of transition between the two areas. This filter is particularly useful for images that do not have a strongly defined transition between the sky and foreground.
The filter features glass optics and an aluminum filter ring threaded on both sides. A rotating ring allows precise positioning of the gradation along the horizon line.