Canon EOS 6D Mark II Basic Instruction Manual - Page 127

i: Setting the ISO Speed for Still PhotosN ISO Auto If the ISO speed is set to "A" (Auto), the actual ISO speed to be set will be displayed when you press the shutter button halfway. As indicated below, the ISO speed will be set automatically to suit the shooting mode. Shooting Modes No Flash ISO Speed With Flash A/C ISO 100 - ISO 12800 ISO 100 - ISO 1600 8 Automatically set (Varies depending on the 8 shooting mode) d/s/f/a ISO 100 - ISO 40000* ISO 100 - ISO 1600* F ISO 400* ISO 400* * The actual ISO speed range depends on the [Minimum] and [Maximum] set with [Auto range]. 125