For example, if I want to change camera ISO with the Pi Camera Module 2, I don't see any difference in images between:
camera.iso = 100 camera.exposure_mode = 'auto' camera.capture(filename)
camera.iso = 800 camera.exposure_mode = 'auto' camera.capture(filename)
which leads me to believe that the "auto" setting resets any of my ISO settings.
However if I make the same change, swapping in the ISO line for camera.brightness = 0 or camera.brightness = 100
... the difference is night and day :)
Any way to figure out what exposure_mode = "auto" actually dictates and what it doesn't?
Camera documentation for reference - https://www.raspberrypi.org/documentation/raspbian/applications/camera.md