D300 with a 70-200 2.8 - Also have the 1.4 converter It will be 8:30pm and overcast with a good chance of rain. Sunset will be 10:44pm. What is the lowest shutter setting that will stop normal player movement? 1/500? At f/4 using the 1.4, I'm thinking of having it at say 1/500 (or however low will stop player movement) and auto-iso up to 1600. It would be really nice to keep it at ISO800, but I don't know if I can get away with it... Thoughts?