I love using filters, the polarizing filter in the forests or on the coast I find essential, also when there is harsh light, when there are low moving clouds and in rivers, waterfalls and coasts I likes to use the ND filter. In situations where a polarizing filter or ND filter is not required, I like to use Ultraviolet to protect the lens. The truth is sometimes cumbersome to wear them, especially in adverse situations where for example it is cold and you are wearing gloves, there is a lot of wind, you are very close to a waterfall and there is spray, etc. . It also happened to me once that I put the filter on the target for a while and then I had to take it out, so I found it interesting to try the K&F magnetic filters, I find that is a comfortable system with a good quality/price ratio. In the package comes a case with the 3 filters (a polarizer, a 10 step ND and UV) and a screw adapter, the case can be placed on the strap to always keep the filters at hand. The use is quite easy, just attach the thread adapter and place the filter on it, because it is magnetic immediately catches it and from there it does not move, if I want to change the filter is as simple as to take it off and put it on, you can watch the video where I record the simple process. The good thing about this system is that the adapter and filters are slim and you can also place two filters at once, for example the polarizer and the ND to remove moving clouds with polarized light avoiding unnecessary reflections. In summary, I loved the system of changing filters so quickly, when traveling or in uncomfortable situations, I will appreciate it.