This 4-stop, 150 x 170mm NanoPro MC Reverse Graduated ND Filter from Haida reduces exposure in selective areas of an image, making it well suited to shooting sunset images that saturate colors in the center of the image while retaining image detail in the sky and foreground. It reduces exposure by 4-stops without adding any color cast. The soft edges of the dense area of the filter blend the exposure correction smoothly without a harsh line of delineation.
This filter is made of optical glass, it is multicoated to reduce flare and to optimize resolution and color transmission. It features a waterproof coating to prevnet beading and for easy cleaning. It fits filter holders that accept 150mm-wide, 2mm-thick filters.