I have a Nikon D800. I shoot portraits and often use Aperture Priority.
I have my ISO set to auto and my minimum shutter speed is set to 250, because my subjects are always moving (I photograph young kids).
I recently shot a child in front of a mural in bright morning sun using aperture 5.6. My camera chose shutter speed of 1/8000 and an ISO of 1400.
Clearly I have something set incorrectly as this SS is way too high, jacking up the ISO and creating lots of noise in my image which I then have to take out in post.
What am I doing wrong? I double checked my menu settings and can't figure out what to change.