Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 143)

ISO Speed Settings for Still Photos
ISO Speed Range When Set Manually
ISO Speed Range Used with ISO Auto
Minimum Shutter Speed for ISO Auto
Set the ISO speed (image sensor's sensitivity to light) to suit the ambient light level. In [ ]
mode, ISO speed is set automatically.
1.
Set the ISO speed.
With an image displayed on the screen, set by turning the < > dial.
ISO speed can be set within ISO 100–51200 in 1/3-stop increments.
Select [ AUTO ] to set the ISO speed automatically.
For details on the ISO Auto range, see ISO speed (recommended
exposure index) in still photo shooting .
ISO speed guide
Low ISO speeds reduce image noise but may increase the risk of camera/subject shake
or reduce the area in focus (shallower depth of field), in some shooting conditions.
High ISO speeds enable low-light shooting, a larger area in focus (deeper depth of field),
and longer flash range but may increase image noise.
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