The Hitech 150 x 170mm ND 0.6 Soft Reverse Graduated Filter is unique compared to other graduated neutral density filters in that the density begins in the middle of the filter and tapers off toward the edge of the filter. The soft-edged, 0.6 density is placed in the middle of the filter in order to help compensate for bright horizons or other circumstances when the brightest part of the image is located in the middle of the frame. Normal graduated ND filters are unable to achieve similar results due to the physical edge of the filter lying within the picture plane while photographing in a similar manner.
This filter measures 5.9 x 6.7" / 150 x 170mm and is constructed out of CR-39 dyed resin. The 0.6 density provides a 2 stop reduction in light from entering the lens.
Reverse graduated filters place the most density in the middle of the filter to accommodate bright horizons and other situations where the brightest part of the image lies in the middle of the composition.
Soft-edged 0.6 density tapers off without a hard, direct line from the center to the edge.
Filter measures 5.9 x 6.7" / 150 x 170mm and is constructed from CR-39 dyed resin.