I have what is probably a very basic question but has caused me confusion. With all the talk about newer cameras having very high ISO settings, most of the discussions seem to be about how well they perform in low light situations. I think that the higher the ISO setting, the faster the image is to develop, kind of like film. When you shoot sports or racing, you always wanted to get higher ISO film. If the same is true in the digital world, wouldn't you want lower ISO settings for low light situations?