Canon EOS R3 Advanced User's Manual page 190

4.
Switch to the indicated shutter speed.
Select [Yes] to switch to the recommended shutter speed.
Selecting [Yes (move to Tv settings)] will display the [Manual setting]
screen. Go to step 2 in
5.
Take the picture.
Caution
The range of the recommended shutter speed indicated varies by shutter mode.
• Mechanical shutter: 1/50.0 to 1/1024.0 sec.
• Electronic first-curtain: 1/50.0 to 1/512.0 sec.
• Electronic shutter: 1/50.0 to 1/2048.0 sec.
• Movie recording: 1/50.0 to 1/2048.0 sec.
Do the following if [No flicker detected] is displayed, or if switching shutter speeds
does not eliminate banding.
• Perform automatic detection again
• Rotate the camera about 90° or switch to automatic detection in other ways
• Try the manual setting option
HF flicker detection may be less accurate under these conditions.
• Scenes with repetitive patterns (with a lattice or stripes, for example)
• Subjects in constant motion
• Extremely bright or dark scenes
• Scenes with multiple light sources
• Scenes with small flashing light sources
• Light sources flickering at lower frequencies
Manual setting.
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