Canon EOS R10 User Manual page 224

Caution
When [Enable] is set and you shoot under a flickering light source, the shutter-
release time lag may become longer. Also, the continuous shooting speed may
become slower, and the shooting interval may become irregular.
Flicker at a frequency other than 100Hz or 120Hz cannot be detected. Also, if the
flickering frequency of the light source changes during continuous shooting, effects
of the flicker cannot be reduced.
In < >, < >, or <
shutter speed changes during continuous shooting or if you take multiple shots of
the same scene at different shutter speeds. To avoid inconsistent color tone, shoot
in < >, < >, or <
Color tone of captured images may vary between [Enable] and [Disable].
Shutter speed, aperture value, and ISO speed may change when you start
shooting with AE lock.
If the subject is against a dark background or if there is a bright light in the image,
flicker may not be properly detected.
Flicker reduction may not be possible under special lighting.
Depending on the light source, flicker may not be detected properly.
Depending on the light sources or shooting conditions, the expected result may not
be obtained even if you use this function.
Note
Taking test shots in advance is recommended.
Detect flicker manually if the screen flickers (as when the light source changes) by
pressing the < > button, selecting [Anti-flicker shoot.], then pressing the
< > button.
Flicker is not reduced in Basic Zone modes.
Flicker reduction also works with flash photography. However, the expected result
may not be obtained for wireless flash photography.
> mode, color tone of captured images may vary if the
> mode at a fixed shutter speed.
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