Multilayer nanocoating technology, the lens has waterproof, oilproof, , and antiscratch performance, for for Nikon for Olympus for Fuji . The gradient gray filter is mainly used for exposure balancing, when the sun is strong, it can reduce the amount of light on the lens. The gradient red filter enhances the red tones in the picture, making the scene more vivid, vivid and layered. The gradient red filter is great tool for shooting scenes such as maple leaves at sunset, burning clouds, or desert dunes in the evening. The gradient green filter is suitable for grassland, woods, and green leaves to set off the background color and highlight the subject.