ive been using my 20d for a little over a year. I am getting married in the carribean (turks and caicos) and have been reading up on beach tips here on the forum. i read that it is suggested to you a polarizer over your lense to help obtain better photographs. I have no clue whats good and what isnt, i was going to look on ebay, i see that Hoya advertises a lot in my popular photography magazine i bought the other day at books a million....i did a quick search on the site and couldnt find much. any suggestions? keep in mind i am not a pro, just enjoy this as a hobby. it will be going on my 24-70 f2.8 thanks!