Does anyone use the "Auto ISO" setting on their cameras at the track or anywhere else, or do you prefer to choose your own sensitivity? I was just messing around with my camera, and saw this greyed-out selection on the menu. I looked it up in the manual, and it seems it will do the same in the PSAM modes as it will in Full Auto...that is, adjust the ISO for "optimum picture results." Hmmmm...I think I still prefer to set me own. But, nice to know it's there, I think.