Actually I wanted to avoid starting the 3rd UV/clear filter discussion in the latest 5 discussions, but it clearly doesn't fit elsewhere so here we go: I got a hint from a fellow photographer that makes me a bit unsure of what I know about lens coating. Usually I just assume that every filter increases flare and slightly decreases color and contrast. A coated one less so than a not coated one, but still. Now, this guy got the idea, that it's possible to improve those issues when using a quality coated filter with older single coated lenses. Since all my lenses are at least classical multicoated, I don't really have material to try...Can someone report personal experiences? Not that it is knowledge I really "need", but it got me currious!