How to get a stuck-filter off a lens
I had circular-polarizer filter stuck on a lens recently (not sure how I managed to get it that tightly stuck either) and tried a bunch of different things to take it off – to no avail. It was considerably harder to take off because circular-polarizers have a top piece that is designed to turn.
One solution would have been to use a rubber-filter-wrench – but I couldn’t find one. So I figured out the easiest solution was to use some masking-tape: Apply the masking-tape around the filter 2 or 3 times and make sure it’s stuck-on really tight. Then twist – hopefully that should give yourself more surface-area to get it off.