I set the ISO myself. I hate high ISO noise so I set it as low as I can get away with. Sometimes I play the ISO setting off the Apature setting to set the depth of field (if that makes sense). For example, if I am shooting 200 ISO and I see that my apature setting (I am using shutter priority mode) is getting down to 5.6 or lower, I will raise my ISO so I can get the apature back up to 8 -11 so that my depth of field is big enough to cover the distance of the car. Does this make sense to anyone?? I don't worry about it shooting motorcycles as even at apature 4.5 the depth of field is big enough for a bike. When I use Auto ISO, my ISO ends up at 400 a lot, and on slab side cars with little signage, I get noise in the paint, not much, but still noticeable to me and I hate it, so I shoot at ISO 200 or lower anytime I can. Overcast days change that I have have to go up on the ISO sometimes. Long answer to short question. Larr On Sun, Jul 18, 2010 at 10:16 PM, <humminboid@xxxxxxxxxxx> wrote: > 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. >