7D Auto ISO vs. fixed ISO?

Started Apr 6, 2014 | Questions thread
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Jim B (MSP)
Veteran MemberPosts: 7,463
Re: 7D Auto ISO vs. fixed ISO?
In reply to RGF, Apr 6, 2014

RGF wrote:

Using auto ISO today (over cast and low light) all of my images out of focus. looking at the info it showed the ISO at 3200. I am using the 7D with a 100-400 L lens. Really got no keepers. I am having difficulty comprehending the ISO setting as some say they never use Auto - I guess now I see why? Any suggestions on camera settings would be helpful. I used M, AV, and TV modes.



I use the same lens with a Canon 60D which has a similar detector. I shoot in auto ISO a lot.

It is not an auto issue - more likely a exposure time issue.

For your BIF, shoot in TV mode with a time no less than 1/800 sec. Your camera will drive the lens to the widest aperture for the magnification you are using. Shoot with the IS on for this speed. Let auto ISO range all the way to 3200, as noise reduction software is really quite good these days.

Good luck, and have fun.

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