Canon EOS R10 User Manual page 437

Caution
Precautions when set to [Movie Servo AF: Enable]
Shooting conditions that make focusing difficult
• A fast-moving subject approaching or moving away from the camera.
• A subject moving at a close distance to the camera.
• When shooting with a higher aperture value.
• Also see Shooting Conditions That Make Focusing
Since the lens is driven continuously and the battery power is consumed, the
possible movie recording time (
The camera's built-in microphone may also record mechanical sounds of the lens
or sounds of camera/lens operations if AF operations are performed or the camera
or lens is operated during movie recording. In this case, using an external
microphone may reduce these sounds. If the sounds are still distracting with an
external microphone, it may be more effective to remove the external microphone
from the camera and position it away from the camera and lens.
Movie Servo AF pauses during zooming or magnified view.
During movie recording, if a subject approaches or moves away or if the camera is
moved vertically or horizontally (panning), the recorded image may momentarily
expand or contract (change in image magnification).
) will be shortened.
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Difficult.