Canon EOS Rebel T5 18-55 IS II Kit - Manual (Page 120)

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Due to the lens characteristics, the four corners of the picture may look
darker. This phenomenon is called lens light fall-off or drop in peripheral
illumination and can be corrected. The default setting is [Enable]. With
JPEG images, the correction is applied when the image is captured. For
RAW images, it can be corrected with Digital Photo Professional (EOS
software, p.318).
1 Select [Peripheral illumin.
correct.].
Under the [z1] tab, select
[Peripheral illumin. correct.], then
press <0>.
2 Select the setting.
Check that [Correction data
available] is displayed for the
attached lens.
If [Correction data not available] is
displayed, see “Lens Correction Data”
on the next page.
Select [Enable], then press <0>.
3 Take the picture.
The image will be recorded with the
peripheral illumination corrected.
3 Correcting the Image’s Dark Corners
Correction disabled Correction enabled
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