Canon EOS 5D Mark IV L-series Zoom Lens Kit 사용자 매뉴얼

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 Correction of Lens Aberrations due to Optical CharacteristicsN

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Peripheral illumination correction, distortion correction, chromatic 
aberration correction, and diffraction correction cannot be applied to 
JPEG images already taken.

 

When using a non-Canon lens, setting the corrections to [Disable] is 
recommended even if [Correction data available] is displayed.

 

If you use magnified view during Live View shooting, the peripheral 
illumination correction and distortion correction will not be reflected in the 
image on the screen. Note that the Digital Lens Optimizer and diffraction 
correction will not be applied to the Live View image.

 

The correction amount will be less (except for diffraction correction) if the 
lens used does not have distance information.

 

The effect of the lens aberration correction varies depending on the lens 
used and shooting conditions. Also, the effect may be difficult to discern 
depending on the lens used, shooting conditions, etc.

 

If the correction is difficult to discern, magnifying and checking the image 
after shooting is recommended.

 

Corrections can be applied even when an extender or life-size converter 
is attached.

 

If the correction data for the attached lens is not registered to the 
camera, the result will be the same as when the correction is set to 
[Disable] (except for diffraction correction).