Can't seem to find any reviews of the Opteka filters. Multi-coated, price is right, how about quality? Any Opteka filter users out there? I want a 72mm multi-coated polarizer and 72mms pricey. I know I could use a smaller one, but not planning on any other lenses. Am a big fan of law of diminishing returns. Even the Hoya at this size is pricey and the lower priced filters don't seem to be multi-coated, except for the Opteka.