Horoscope Fish
Senior Member
I too am baffled by the problems people seem to be having with Auto ISO. I use it pretty much all the time because ISO and the potential problems that come with it (noise) is the least of my concern when compared to the problems that accompany improper shutter speed (motion blur) and aperture (poor depth of field/blurred shot); both of which very much ARE my concern. There are no hidden, mysterious algorithms at work here; it's a simple logic tree.Do you make this stuff up or does someone give it to you? There is no motion-specific algorithm, it's as basic a decision making process as can be...
- Can I get a proper exposure at current ISO without dropping below the minimum Shutter Speed?
- Yes - Take the picture
- No - Have I hit Max ISO?
- Yes - Drop shutter speed to fastest possible for Aperture and ISO and take the picture.
- No - Raise ISO one step and go back to the beginning
Don't believe me? https://support.nikonusa.com/app/answers/detail/a_id/14130/~/how-does-the-auto-iso-feature-work?
My Basic Settings:
Auto-ISO: Enabled.
ISO sensitivity: 200
Maximum sensitivity: 6400
Minimum shutter speed: 1/125
I use these settings on my D7100 for just about all my lenses. I use ISO 200 because it's essentially "noise" free on the D7100 and helps keep the shutter speed a little on the high side because I very strongly adhere to the concept of minimum shutter speed being *at least* 1.5 times the focal length. I find these settings work really well most all of the time and think they'd be a very good place to start if you're not sure what settings to try.
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