Canon EOS 1300D - Manual (Page 125)

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3 Correcting the Image’s Dark Corners
The camera already contains lens peripheral illumination correction
data for approx. 30 lenses. In step 2, if you select [Enable], the
peripheral illumination correction will be applied automatically for any
lens whose correction data has been registered in the camera.
With EOS Utility (EOS software, p.314), 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, refer to
the EOS Utility Instruction Manual.
Lens Correction Data
 Peripheral illumination correction cannot be applied to JPEG images
already taken.
 Depending on shooting conditions, noise may appear on the image
periphery.
 When using a non-Canon lens, setting the corrections to [Disable] is
recommended, even if [Correction data available] is displayed.
 If you use the magnified view during Live View shooting, the peripheral
illumination correction will not be reflected in the image displayed on the
screen.
 If the effect of the correction is not visible, magnify the image after
shooting and check it again.
 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].
 The correction amount applied will be lower than the maximum
correction amount settable with Digital Photo Professional (EOS
software).
 The correction amount will be less if the lens used does not have
distance information.
 The higher the ISO speed, the lower the correction amount will be.