Here is a reasonably priced "L" lens that not many discuss. On-line reviews seem to be universally positive. I'm just curious whether anyone here has direct experience with the lens. Has anyone doen a head-to-head with the 70-200mm f/2.8? Does anyone have any comparison images with this lens + 2X TC with the Canon 400mm f/5.6? I'd love to get hold of the 200mm f/2 or f/1.8L, but I don't see that one in my future and this one looks like it might be a good runner-up.