NiSi 4 x 5.65" Nano Hard-Edge Graduated IRND 0.9 Filter ( 3-Stop )
is a rectangular filter that helps to darken specific areas of an image, such as bright skies, while allowing for a normal, unaffected exposure in the other regions of the image. The filter is densest at the edge and tapers to clear by the middle, with a hard-edged line of transition between the dense and clear areas. A neutral density filter with a hard-edged line of transition is particularly useful for images that feature horizons, or any hard transition between the sky and land. Neutral density filters do not affect the coloration of the image and this filter provides up to a 4-stop reduction in light from entering the lens.
This NiSi 4 x 5.65" Nano Hard-Edge Graduated IRND 1.2 Filter is constructed from optical glass for clarity as well as color fidelity, and measures 4mm thick.
●4 x 5.65" graduated neutral density filter darkens bright areas of an image, such as skies, while leaving the remainder of the frame unaffected.
●16x filter factor provides up to a 4-stop reduction of light in selective areas.
●Hard-edged line of transition between the dense and clear areas.
●Useful for images that feature horizons, or any hard transition between the sky and land.
●Filter does not affect coloration of the image and is ideal for use with other filters.
●Each surface includes one layer of NiSi Optical Nano Coating that attenuates infrared light as well as visible wavelengths, to maintain color neutrality and suppress color casts due to increased exposure times.
●Nano coating provides an improved beading effect with water or oil for more efficient cleaning.
●Constructed from optical glass for clarity.Features：
Graduation Type：Hard Edge
Rectangular Size：4 x 5.65" / 101.6 x 143.5 mm
Filter Thickness：4 mm