I've been a fan of K&F Concept for a long time and own many filters. Especially at the beginning, the cheap products were a real blessing for my wallet. I just couldn't afford expensive polarizing filters, ND filters or adapters. However, with this filter series, they impressively demonstrate that the K&F Concept can also be of absolutely high quality. I can report that just unpacking the filters is a real pleasure. Although this does not count directly in the rating, it immediately conveys a completely different feeling than with the other product series of the brand. It continues with a very attractive and haptically convincing case, which allows the filter to be removed via a tab. But now to the filter itself. I already have a few polarizing filters in use, but none of these filters really convinced me as much as the Nano-X PRO. The processing is simply top-notch, the weight feels good in your hand and the thread is fun - when screwing it on and even when unscrewing it again. Most of you will know that cheap filters like to stay in place. The optical performance, which ultimately matters, is great. Reflections are skilfully filtered and there is no falsification of the actual image. The look that emerges is simply great. If a little magic is then done in post-processing, photos of cars just look great, a completely different level. So I can give my recommendation without hesitation.