Maybe I simply got a better model, or the expectations of some other reviewers regarding the effects of a completely darkened ND3-1000 are simply too high. Of course, you can see optical effects when you set the ND filter to ND1000. It's not without reason that there are much more expensive ND filters that only cover the ND2-ND32 range. We're all looking for the perfect all-rounder, but in reality, there isn't one. I really like the Nano X series. I already own several filters from this series and I'm absolutely satisfied. For the price, you simply can't complain, and I personally find the effects with ND1000 acceptable. If I want to take particularly high-quality photos, for example with long exposures, then I use a fixed ND1000 filter anyway. However, if I'm on the go and want to be prepared for different situations, I take the ND3-ND1000 with me. The filter is extremely well-made, which you can tell by the way it feels when you pick it up. I'm used to this kind of craftsmanship from K&F Concept, as my tripod, lens adapters, and other filters are also equally well-made. I can definitely recommend it if you have the right expectations for a filter like this.