Are there any "rules" for using ISO?

Started Apr 3, 2013 | Discussions thread
Hugowolf
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Re: Are there any "rules" for using ISO?
In reply to GreenMountainGirl, Apr 3, 2013

GreenMountainGirl wrote:

I have been experimenting with low-light images of moving subjects (mostly deer) and getting mixed results.  Using aperture-priority produces slower shutter speeds, and raising ISO does not seem to work.  Using shutter-priority works better, but still often have to make exposure adjustments in LR4.  Most of these photos are at/close to 300mm, so have not noticed any significant effect on DOF, just need to get a better idea of ISO (and exposure compensation) because there often isn't much time for "test photos"!

There are no rules as such. You just want the lowest ISO that will give you the shutter speed and aperture you need.

If your shots are not exposed correctly using a semi-automatic mode like shutter or aperture priority, it has nothing to do with ISO, it is an exposure problem. What exposure mode are you using: spot, partial, matrix/evalutive, average?

Does your camera not have an auto ISO mode?

Brian A

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