Congratulations on the new glass! I think if you look carefully at the settings of many of the bird shots, especially Nate's, you'll see that 1/1000 seems to be a good starting point for stopping action. Some of his shots I remember have been around 1/640, and others have been much faster. I don't know from experience what the minimum Tv is, but empirically these seem to work anyway.


Definitely post some shots with your new lens so we can learn from your settings what works well.