How to Take Advantage of Auto ISO
We all know about the “exposure triangle”, right? It’s one of the first things you read about when you learn the basics of photography. Shutter speed, aperture, and ISO make up the triangle, and their settings determine your exposure.
I may write an article about that someday. (There are a lot of articles out there about that topic. But I like to put my spin on things.)
Anyway, most of us are comfortable with using “Aperture Priority” mode and “Shutter Priority” mode on our camera. Some manufacturers use different names for these modes, but the function is the same. You set one value (aperture or shutter speed) and the camera adjusts the other value (shutter speed or aperture, respectively) to give you a proper exposure, based on the camera’s metering.
But there’s a common camera feature that many folks forget about, and that’s Auto ISO.
Most of us set an ISO value manually — typically the lowest value appropriate for the situation — and we leave it there. And that’s fine. But if we’re ok with the camera setting shutter speed or aperture automatically, why not ISO?
