H&Y K-Series HD MRC Reverse GND Filter ND1.5
The 100 x 150 mm K-Series Reverse Graduated Neutral Density 1.5 filter from H&Y Filters can be used to darken bright skies, particularly during sunrise or sunset, while keeping the exposure in the rest of the image normal and unchanged.
This filter achieves its effect through a density band of 1.5 above the centre, which blocks up to 5 stops of light. This band runs in both vertical directions and tapers to a density of approximately 1.2 and a light reduction of 4 stops at the edge above it. Directly below the 1.5 density band, the filter gradually transitions into a transparent section, with a soft transition line.
The placement of a 1.5 density band with a clear area directly below it means that the 100 x 150 mm K-Series Reverse Graduated Neutral Density 1.5 filter follows the position of the sun when it is at or just above the horizon. In such cases, the sun can appear closer to the centre of an image than to the top edge, creating an increase in brightness that is more prominent on either side of the sun than above it. This brightness pattern corresponds to the density pattern on the 100 x 150 mm K-Series Reverse Graduated Neutral Density 1.5 filter. The soft transition line in this reverse graduated neutral density filter is useful for images without a strongly defined transition between the sky and the foreground, while the gradation from 5 stops to approximately 4 stops is applicable to multiple brightness areas in the sky.
The 100 x 150 mm K-Series Reverse Graduated Neutral Density 1.5 filter comes pre-mounted in an H&Y Filters 100 x 150 mm magnetic filter frame with quick-release closure for use with an H&Y Filters 100 mm K-Series filter holder. When combined with a 100 mm K-Series filter holder featuring two magnetic filter slots, filters with a magnetic filter frame can be magnetically stacked in front of the camera lens, rather than having to be placed in a specific number of slots in the filter holder. This allows the user to decide how many filters to use, which can then be quickly installed, repositioned, or swapped out for different subjects or changing light conditions.
During use, the forward-facing rulers on the sides of this magnetic filter frame help with accurately positioning the 100 x 150 mm Reverse Graduated Neutral Density filter relative to other filters it is stacked on. This perfectly complements the use of the 100 x 150 mm Reverse Graduated Neutral Density filter, whose effect can be adjusted to changing light conditions or creative requirements by moving it up or down. The quick-release magnetic filter frame also reinforces the edges of the 100 x 150 mm Reverse Graduated Neutral Density filter, increasing the rigidity of the filter and promoting sharp results by keeping the filter lying flat. A filter bag for storage and transport and a microfibre cloth for filter maintenance are also included.
