love using filters, the polarizing filter in forests or on the coast I find it essential even when there is harsh light when low clouds are moving and in rivers, waterfalls and coast I love the ND filter. In situations where the polarizing filter or ND filter is not needed, I like to use ultraviolet to protect the lens. The truth is sometimes awkward to wear them, especially in adverse situations where, for example, it's cold and you're wearing gloves, there's a lot of wind, you're very close to a waterfall, and there's spray, etc. It has also happened to me once that I put the filter on the target for a while and then took it out so I found it interesting to try the K&F magnetic filters, I find it a comfortable system with a good one Price-performance ratio. The package includes 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 belt to always have the filters at hand. Using it is pretty simple, just attach the threaded adapter and place the filter on top as it's magnetic catches it instantly and from there it doesn't move. If I want to change the filter so easily it's as easy as removing and inserting you can watch the video where I record the simple process. The good thing about this system is that both the adapter and the filters are thin and you can also place two filters at the same time, e.g. B. the polarizer and ND to remove moving clouds with polarized light, eliminating unnecessary reflections. In summary, I liked that the system can change the filter so quickly when I'm traveling or in uncomfortable situations, I would appreciate it.