Canon EOS-1 D X Mark II Instruction Manual page 166

i: Setting the ISO Speed for Still Photos
3 Setting the Manually-Settable ISO Speed Range
You can set the manually-settable ISO speed range (minimum and
maximum limits). You can set the minimum limit within L (equivalent to
ISO 50) to H2 (equivalent to ISO 204800), and the maximum limit within
ISO 100 to H3 (equivalent to ISO 409600).
166
Select [ISO speed settings].
1
Under the [z2] tab, select [ISO
speed settings], then press <0>.
Select [Range for stills].
2
Set the minimum limit.
3
Select the minimum limit box, then
press <0>.
Select the ISO speed, then press
<0>.
Set the maximum limit.
4
Select the maximum limit box, then
press <0>.
Select the ISO speed, then press
<0>.
Select [OK].
5