Canon EOS-1 D X Mark II Instruction Manual page 167

3 Setting the ISO Speed Range for ISO Auto
You can set the automatic ISO speed range for ISO Auto within ISO
100 - ISO 51200. You can set the minimum limit within ISO 100 - ISO
25600, and the maximum limit within ISO 200 - ISO 51200 in 1-stop
increments.
The [Minimum] and [Maximum] settings will also be applied to the ISO
speed safety shift's minimum and maximum ISO speeds (p.424).
i: Setting the ISO Speed for Still Photos
Select [Auto range].
1
Set the minimum limit.
2
Select the minimum limit box, then
press <0>.
Select the ISO speed, then press
<0>.
Set the maximum limit.
3
Select the maximum limit box, then
press <0>.
Select the ISO speed, then press
<0>.
Select [OK].
4
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