Shooting in Auto ISO allows you to maintain a particular shutter speed and aperture, while using the ISO to adjust the exposure automatically. When shooting in P and Av mode, you can also set a minimum shutter speed to avoid the risk of camera shake. If you set the minimum shutter speed to Auto, then the set shutter speed will be no slower than the reciprocal of the focal length of the lens - for example with a 200mm lens, it will be 1/200sec. If you want to choose a different shutter speed, then you should set the minimum speed manually rather than automatically.
- Camera settings
- EOS 7D Mark II