I suppose this could or should be in the D300 forum but I thought it was more appropriately posted here in the lens forum. Now that I have my AF issues fixed and I know that my D300 is working as it should be, I can now take a look at AF fine tune to tweak my lenses. But what is the best method for doing this? I see some people using focus charts but I also see others saying setup is critical and if not done correctly you can't tell what's happening. Other people use the battery method. So how do you determine what AF fine tune setting is best?