Canon 50D 사용자 가이드

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 Lens Peripheral Illumination Correction

The camera already contains lens peripheral light correction data for 
about 20 lenses. In step 2, if you select [Enable], the peripheral light 
correction will be applied automatically for any lens whose correction 
data has been registered in the camera.
With the EOS Utility (provided software), you can check which lenses 
have their correction data registered in the camera. You can also 
register the correction data for unregistered lenses. For details, see the 
Software Instruction Manual (CD-ROM) for EOS Utility.

 

For JPEG images already captured, lens peripheral light correction 
cannot be applied.

 

Depending on shooting conditions, noise might appear on the image 
periphery.

 

When using a third-party lens setting the correction to [Disable] is 
recommended, even if [Correction data available] is displayed.

 

Lens peripheral light correction is applied even when an Extender is 
attached.

 

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

 

The correction amount applied will be slightly lower than the maximum 
correction amount settable with Digital Photo Professional (provided 
software).

 

If the lens does not have distance information, the correction amount will 
be lower.

 

The higher the ISO speed, the lower the correction amount will be.

 

The correction might not be noticeable with lenses whose peripheral light 
fall-off is minimal.

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