Anyone have any suggestions on which circular polarizer to buy for my Canon 350D? I have a lens with a 62mm and a 77mm thread I'd like to use. Tiffen has one that seems OK but has mixed reviews on Amazon. I have Tiffen UV filters on all my lenses and I've been OK with them, but obviously UV filters are pretty undemanding. I'm looking to get circular polarizers for under $80 and don't understand why there is such a price range for these. Do you really get what you pay for?