Quote: Hmm that sounds like something that I would like to try. By +/- you mean exposure adjustments? What do you mean by your ISO being custom auto? where do you set that?
Go where you would normally set your ISO and go up to the top to AUTO. You adjust the range you want the camera to use with the front and rear dials. Like 100 - 640 or 200 - 800 - whatever floats your boat. I use exp comp (+/-) on the front dial and Av on the rear. The camera will adjust the shutter to a certain point before it will start adjusting the ISO, but it won't let the shutter get to an unreasonable value until it has maxed out the ISO. Like I said, this is what works for me.