I have the impression the D4 handles all out action AF better. >I also feel D4 AF is faster or possibly more accurate, The feeling I get is I wave the D4 vaguely in the direction of my subject and it nails the heck out of it. > >Best regards, SteveK
Steve, I had the same impression when I tested the D4. But beware, the D3 made me so sloppy that I had a really hard time getting any non blurry shots with my D7000. It took months to hone my shooting style enough to ween from TriPod then MonoPod to HandHeld. Then when I got my D800 it moved me to a new level, but at least I knew what to do. Even though the D800 was not designed for all out action, it handles it quite well, especially considering that it delivers twice the MegaPixels.