Auto ISO shift - What is it?

[slammer]

I have a new, well for me anyway, canon g10 and I have been experimenting lately. I found a setting call auto ISO shift on it but am not sure what it does. I tried google but only found either super techy answers that I can not understand or really vague answers.

Can anyone explain auto ISO shift in layman terms?

[Cannibalized]

oh I love it. it's great for low light conditions, where you want a certain ss and f stop, it will change the iso to make it work for you, or at least try to. i use it for concerts, mostly, or quick shooting outside.. it usually outside will keep my settings and go between 100 and 800

[Adaptive]

It's an automatic feature that helps your photos come out right so they aren't super dark. (pretty basic & vague explanation)

Like cannibalized said, it helps you get good exposure in different light settings. Sometimes you want to use a certain shutter speed and or aperture or both. So the only other way to allow the correct amount of light in is the ISO. Auto ISO fluctuates the "film speed" so that you will get a properly exposed shot. Think of it as if you shoot in TV (shutter priority) or AV (aperture priority) modes. If you shoot in either of these modes the shutter speed or aperture will adjust accordingly to the scene you are photographing, ISO shift is not exactly the same but that's an easy way to think about it.