I just got myself a HOYA CIR-PL (If that matters) polarising filter to go on both my 18-55mm IS and the 55-250mm IS and I have some questions.
A) The (head? Barrel) rotates (and I knew this) so what's the best way to know which point of rotation I need to adjust the filter after I've found focus? (I thought I'd get a little book with the filter telling me this stuff)
B) Is there a good way to ensure I can safely adjust the rotation of the filter without bumping my zoom and focus out? (especially focus given it's directly attached to the front of the )
C) Is there only one angle (flat) that I can use it or can I play with different rotations? What difference would it make?
I know it seems that I am asking many questions that I should have asked before getting it but it was bought on impulse when I could see some marks on my (I bought a cleaning kit too) and I had read here that they are also a very good method of protection.
Any info is much appreciated.