I never used auto ISO until recently when I realized that in order to guarantee a fast shutter speed as well as the best lens aperture for depth of field control for subjects like flying birds and running horses, auto ISO the best strategy. I use manual exposure mode, choose my shutter speed (in this case 1/1250th of a second) and select the f/stop (in this shot I chose f/10). If I used shutter priority, I'd have no control over the lens aperture. By choosing auto ISO, I am basically saying that I'm willing to have the ISO go up in dark circumstances in exchange for the shutter and the f/stop I want.
2 Comments
Apr 30, 2016, 10:58:38 AM
Jim Zuckerman - You're welcome, Bryan. I agree with your thoughts on this. Just 3 or 4 years ago I wouldn't be using auto ISO, but now that we can accept minimal noise at 2000 to 3200 ISO, this technique works very well for action photography.
Apr 29, 2016, 11:32:40 PM
Bryan - Jim,
I think this is especially relavent as ISO technology improves (less noise at higher ISO values) and the newer cameras letting you set the upper limits for auto ISO, giving you a ceiling of how much noise you will tolerate from your particular camera.
Thanks again for all you insights.