Quote Originally Posted by Jon Ruyle
Canon doesn't make a 500 f/5.6 because their marketresearchshows that no one but you and me would buy one

...and me makes three. Heck, I'd settle for a 400mm f/5.6 with 4-stop IS - they've already got a pretty sharp but aging 400mm f/5.6, so that's a low bar, right? Canon, are you listening?