Is the Temperature setting also changing? What is your camera white balance set to? Is it on Auto or is it set to a preset (daylight, tungsten, cloudy, etc.)?
Tint is the magenta/green scale of the camera's white balance. Temperature is the Blue/Yellow scale.
Thank you, John, for the pertinent questions. Yes, the Temperature
setting also changes; I had not noticed that when I was worrying about
Tint. And my camera's white balance is currently (and was when I took
the photos I have been working with) set to Auto. Is that the answer to
my question? Does Photoshop read off what the camera did in setting its
own white balance and automatically set the values in the Camera Raw
As I understand it, the camera sets the white balance temp/tint to what it perceives as the correct balance when you set the camera to Auto. Then those values are passed on to Adobe Camera Raw, where you can adjust them if necessary.
So, yes, changing temp/tint values are expected when the camera is set to auto white balance.
That's beautifully clear and logical, John. Thank you very much.