Awesome! Hope that did not come across as criticism. Just me really wanting to see what this lens can do. Really appreciate the info and pictures found so far.
I wonder about he use of this lens for sports. I know shooting from the end zone at a football game, my 400mm f2.8 seems to be pretty long. I do alternate between a FF and 7D, and used to own a 1D4. I will sometimes drop in my 1.4X or 2X, but rarely get any keepers. Of course i can go up in the top row of stands with the teleconverters, and they d better up there. And there is always the "headshot" of the coach or key player from across the field...
The Sigma 200-500 f2.8 seems to suffer from the same malady. It's easy to find photos of it. Not easy to find pictures taken with it, except corny "review" pictures.