All in all a good product. The quality of the glass filter (ND1000) looks good and is easy to slide into the holder. Everything is made of metal and makes a robust impression. Now for the cons or: The adapter rings only have one thread, which I can screw onto my lens (in my case 49mm). If I want to mount a polarizing filter, etc., I first have to put the screw-on filter and then the adapter on top of it. That's too cumbersome for me and I think it damages the screw-on filters and their threads after a while. Maybe I'm doing something wrong, but I would have liked the adapter ring to have two threads. There is space for it. So for understanding the following order is desired: 1. Adapter ring on the lens 2. Screw-on filter on the adapter ring What I also noticed is that the adapter ring sits very smoothly in the filter holder. It's almost like a steering wheel which you can easily turn several laps. A small rubber lip (on the adapter or on the holder) might help here. Of course I have to have some play, but that's too much for me. This set is going back for the time being until I have an alternative or it is rectified. Nevertheless good product