Gray filters are indispensable in photography. They are used all the time, especially in landscape photography. You know these great pictures with the flowing water that looks so "fluffy" soft - for something like that you need a gray filter. A gray filter, or "ND filter" (neutral density filter) swallows the light so that you can expose longer can. This long exposure and the movement of the water makes it look so great. By shooting with a ND filter, the light that hits it will be darkened and you can shoot better in very bright surroundings shoot with a wider aperture or longer exposure times. By shooting with a longer exposure time you can achieve beautiful effects. Normally, pictures are overexposed if you choose a particularly long exposure time. You can prevent this with a neutral density filter and take pictures with a long exposure time despite a lot of light. This has the result that movements become blurred and merge into one another. In this way, for example, you can capture bodies of water or clouds , as well as represent fast-moving objects in a particularly creative way. A cleaning cloth is included. I took the five pictures and numbered them. The difference is clearly visible. The filter is worth the money, it is simply screwed on and even my lens cover still fits on it. This filter makes you want more and gets full marks from me!