For those that are familiar with Nikons, specifically the D70S...There are a few different shooting modes as you are aware. There is a fully automatic mode as well as a P, M, S, and A mode (among some other scene modes). My question is what is the difference between the full automatic mode and the P mode. My manual says that in P the camera chooses the shutter speed and aperture automatically. Isn't that exactly what the automatic mode does?