Canon EOS 70D Operation Manual - Page 122

i: Setting the ISO SpeedN Auto ISO 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 Mode ISO Speed Setting A/7/C Automatically set within ISO 100 - ISO 6400 2/4/5/6/G 83 Automatically set within ISO 100 - ISO 1600 F d/ s/ f/ a F With flash Automatically set within ISO 100 - ISO 12800 Automatically set within ISO 100 - ISO 12800*1 ISO 400*1 ISO 400*1*2*3*4 *1 : The actual ISO speed range depends on the [Minimum] and [Maximum] settings set in [Auto ISO range]. *2 : If fill flash will cause overexposure, the minimum ISO 100 will be set (except in the a and F modes). *3 : Except in the A, 6, and F modes. *4 : When using bounce flash with an external Speedlite in the C, 2, 3, 4, 5, or d mode, the ISO speed will be set automatically within ISO 400 - ISO 1600. 122