An ND filter that keeps what it promises. As soon as you unpack it, you notice that great value was placed on high quality. The transport cover is already very neatly worked and thus ensures safe transport of the filter. The filter itself works really well. As soon as you unscrew it, you can tell that everything feels really good. The metal ring is slightly matted, which ensures a great grip, especially when adjusting. Adjusting between ND 2-32 works seamlessly and really smooth. Absolutely jerk-free but also heavy enough that nothing changes so quickly. When setting it up yourself, you don't notice any disruptive influences such as the typical cross, which was often the case with variable ND filters. Also, the value from ND 2 to ND 32 is perfect for most long exposures. Especially when it comes to sunsets or the typical smoothing of water, this ND filter is perfect. In addition, the filter is nano-coated so that water droplets roll off directly and the filter cannot fog up in the first place. What was also important to me was that the filter is not so thick and heavy. This is where the K&F Concept ND Filter really shines. It is almost as thin and narrow as a normal UV filter. A feature that I like very much. Since the filter starts at ND-2, you wouldn't have to write it off even with normal photos and can vary very quickly. After my first tests, I have to say that I wouldn't want to be without this filter in my camera bag anymore.