I am obtaining my first autofocus Sony lens for a trip---24-70 f2.8 GM II. My largest filters were 77 mm and I have a million step up rings to use the best of them. As long as obtaining 82 mm filters for it alone, thought it might be good to get the magnetic system with cap. I worry about losing them while walking or perhaps rubbing off in a bag. Are people satisfied with them? I was thinking circ pol and 6X ND Thanks.