Haida Glass Filter Nanopro Coated 100mm 0, 9 3 Stops, 100mm x 150mm The latest line of Haida Red Diamond filters promises all the benefits of Nanopro filters and are designed to be the toughest line of filters in Haida's current offerings. The red diamond features a shock-resistant and scratch-resistant design, making them perfectly suited to the challenging challenges of outdoor photography. The Haida Red Diamond filters feature an ultra thin multi-layer nano coating that maintains superb image clarity while delivering true colour with zero colour cast. The Red Diamond series is twice the strength of a normal glass filter, which provides a low risk of accidental breakage. With a waterproof, oil and fingerprint resistant surface, this filter is easy to clean and ideal for use in harsh environments thanks to its scratch resistance. The quality and convenience are combined with the R5 rounded corner design, which makes inserting into the filter holder much easier. Reverse Graduated Neutral Density Filters are the perfect filter for sunrise and sunset images. With the darkest effect occurring through the middle of the filter then fades slowly as it reaches the top, this filter is great for responding to overexposure to the horizon line. These filters are rectangular shaped to provide more flexibility to move the filter up or down into the holder to precisely position the graduation line, to create ultimate control. Haida filters come in a metal protective case and are 2mm thick, so they are compatible with most popular 100mm filter holders available today, including the Haida 100mm 100-Pro filter holder and Lee FK filter holder.