Since the 7D has auto iso (which I understand is a relatively new feature for Canon?) I was wondering what you think it does when calculating the iso. So if you are in Tv mode, does it choose aperture, along with the lowest possible iso? Vice versa? This thread got me thinking about this:
For example, on Pentax cameras, there is something that is called the "Program line" that governs how ISO, shutter speed, and aperture are controlled depending on what mode you are in (P, Tv, Av, Sv, TAv, etc.) You can control how you want the auto iso in combination with the other parameters to behave. You can set it several different ways. For example, you can set it to "DOF Priority." If you then are in Tv mode, and the camera selects the aperture and ISO, it will choose a higher iso and smaller aperture such that DOF is larger. etc. etc.
I have looked, and I don't believe there is any setting to adjust the type of priority the 7D uses when auto-selecting iso.
Now in order to head-off the inevitable "i don't use auto iso, I just select an iso" response...I know that I can do that, and often do. I am just interested in others' experience with the auto iso.:p