Canon EOS M6 Mark II Advanced User's Manual page 131

Peripheral Illumination Correction
Vignetting (dark image corners) can be corrected.
Depending on shooting conditions, noise may appear on the image periphery.
z
The higher the ISO speed, the lower the correction amount will be.
z
The correction amount applied will be lower than the maximum correction
z
amount that applied with Digital Photo Professional (EOS software).
Peripheral illumination is corrected automatically in Basic Zone modes when
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correction data is registered on the camera.
Distortion Correction
Distortion (image warping) can be corrected.
To correct distortion, the camera captures a narrower image area than the
z
area seen when shooting, which crops the image a little and slightly lowers the
apparent resolution.
Setting distortion correction may change the angle of view slightly.
z
When you magnify images, distortion correction is not applied to the images
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displayed.
Distortion correction is not applied in movie recording.
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Images with distortion correction applied will not have the Dust Delete Data
z
( = 176) appended. Also, the AF point may be displayed out of position,
relative to the time of shooting.
Lens Aberration Correction
131