Canon EOS 5D Mark IV L-series Zoom Lens Kit Owner's Manual

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3
 Correction of Lens Aberrations due to Optical CharacteristicsN
208
3
Select [Enable].
 
Check that [Correction data 
available
] is displayed for the 
attached lens.
 
Select [Enable], then press <0>.
4
Take the picture.
 
The image will be recorded with the 
peripheral illumination corrected.
 
Depending on shooting conditions, noise may appear on the image 
periphery.
 
The higher the ISO speed, the lower the correction amount will be.
The correction amount applied will be slightly lower than the maximum 
correction amount that can be applied with Digital Photo Professional (EOS 
software, p.598).