Hi all,

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 lenses and I have some questions.

A) The lens (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 lens)

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 lens (I bought a cleaning kit too) and I had read here that they are also a very good method of lens protection.

Any info is much appreciated.