Canon EOS 90D Advanced User's Manual page 369

] Chromatic aberration correction ( = 209)
[

Chromatic aberrations (color fringing along the subject's outline) due
to the lens characteristics can be corrected. If [Enable] is set, the
corrected image will be displayed. If the eff ect is diffi cult to discern,
magnify the image ( = 336).
] Diff raction correction ( = 209)
[

The diff raction by the lens aperture degrading the image sharpness
can be corrected. If [Enable] is set, the corrected image will be
displayed. If the eff ect is diffi cult to discern, magnify the image
( = 336).
Processing RAW images in the camera will not produce exactly the same
o
results as processing RAW images with Digital Photo Professional (EOS
software).
If you perform [Brightness adjustment], noise, banding, etc. may be
o
intensifi ed with the eff ects of adjustment.
When [Digital Lens Optimizer] is set, noise may be intensifi ed together with
o
the eff ects of correction. Image edges may also be emphasized. Adjust Picture
Style sharpness or set [Digital Lens Optimizer] to [Disable], as needed.
The eff ect of the lens aberration correction varies depending on the lens used
o
and shooting conditions. Also, the eff ect may be diffi cult to discern depending
on the lens used, shooting conditions, etc.
RAW Image Processing
369