I am IMPRESSED by the AF speed and SHARPENSS of the 80-400AFS! It had NO problem focusing on anything flying by the lens. Here is a 10 frame burst from the D4 and as you can see, it locked on and delivered sharp images the whole burst.
Moose Peterson Video Productions
Color Cast Removal is as old as digital but we have very modern ways to quickly deal with it. Here's my favorite way in ACR.