I have a canon rebel K2. I want to purchase a polarizing filter but I don't know what to buy? Many of the ones I've seen come in different sizes. I'm afraid I will buy the wrong size. I have a regular stock lens. How much would one normally spend on a polarizing filter? I've seen a wide range of prices. What's the best brand? I'd really appreciate some help on this one. Thanks!
--Peter
--Peter