NiSi Horizon Line Graduated ND Filter (100 x 150mm, 4-Stop)

This filter achieves its effect with a 1.2 band of density across its center region that provides up to a 4-stop reduction in light from entering a lens. The band of density extends approximately 1.25" in both vertical directions before tapering to clear below and above, with soft-edged lines of transition before the clear areas. The clear areas then extend approximately 2.3" until they meet the top and bottom edges of the filter.

A narrow 1.2 band of density with larger clear areas directly above and below it allows the NiSi 100 x 150mm Horizon Line Graduated Neutral Density 1.2 Filter to specifically match the positioning of the sun when it is at, or immediately above, the horizon. In such instances, the sun will appear closer to the center of an image as opposed to the upper edge, and an increase in brightness is created which is much more prominent on both sides of the sun than either above or below it. This pattern of brightness corresponds to the density pattern on the 100 x 150mm Horizon Line Graduated Neutral Density Filter 1.2 Filter. The soft-edged lines of transition in this filter are useful for images that have features alongside the sun that cannot be confined within the band of density.

This filter is compatible with filter holders that can accommodate 2mm-thick, 100mm-wide rectangular filters and is constructed from optical glass for clarity as well as color fidelity. Each glass surface includes one layer of nano coating. The nano coating associated with this filter results in an improved beading effect when in contact with water or oil for greater cleaning efficiency.