The 150 x 170mm Nano Hard-Edge Graduated IRND 0.6 Filter from NiSi has a rectangular shape and helps darken specific areas of an image, such as bright skies, while allowing for normal, unaffected exposure in other parts 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 a prominent horizon, 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 2-stop reduction in light from entering the lens.
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