Hi, I'm thinking of buying a circular polarizer for my lenses. The only problem is that two of them have 52mm thread attachments, whereas one has a 55mm attachment. The larger lens is a 55-200mm telephoto. Will I be able to use a 55-52 step-down ring on this lens without any vignetting, or would I need to get a 55mm filter and a 52-55 step-up ring? I've heard you might get some vignetting with wide-angle lenses, but this is hardly wide-angle. The former will be cheaper and less of a hassle to me (not having to move the step ring between lenses), but it'd be pointless if I got horrible vignetting on my photos. Thanks! P.S. I know I could get a 77mm filter and a huge step-up ring, but seriously, have you seen the PRICE of them??? And if I was to get a pro lens with a 77mm thread, I'd probably get a top-of-the-range B+W filter to go with it.