Canon EOS M50 Mark II Advanced User's Manual page 217

Maximum [AUTO] ISO Speed
For ISO Auto, you can set the maximum ISO speed limit within ISO 400–25600.
1.
Select [
2.
Select [Max for Auto].
3.
Select the ISO speed.
: ISO speed settings].
Select [Max for Auto], then press <
Select the ISO speed, then press <
>.
>.
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