I'll be honest, I'm new to filters. I've been shooting with my camera for years, but I've never really delved into the subject of filters. Now it was finally time to change that. This set came at just the right time, as it contains three common filters, inviting me to experiment. There's also a practical little bag with three compartments for easy and safe storage of the filters, as well as a couple of cleaning cloths to keep everything clean. It's a complete package. Since I have two 67mm lenses, I bought the corresponding set. All three filters can be screwed onto and off the lenses without any problems. The size is correct, and the thread seems to be well-made. As a private individual, I obviously can't measure whether these are actually the stated filters of ND8, 64, and 1000. What I can say, however, is that you can clearly notice the individual stops and achieve completely different results with each one. That's what ultimately matters. The image quality also seems very good to me. I was a bit concerned because you always read a lot of stories online about cheap filters negatively affecting sharpness. Fortunately, I haven't found that to be the case here. The images are razor-sharp and look very good.