Haida's 100x100mm neutral density filter is made of high quality Schott glass. Neutral-Density ND filters help to reduce and modify bright areas of an image to bring balance without altering hue or color rendition. This is especially helpful when shooting landscape photography under bright skies. Features: Haida 100mm x 100mm square neutral density Filter Provides different stop reduction in light entering the lens, no color shift. Compatible with Haida 100 square filter holder. Whats included. Haida 100x100mm Neutral Density Filter. Metal Case / Tin.