Canon EOS REBEL T8i, Advanced User'S Manual

Page: 276 / 775

Diffraction Correction
Diffraction (loss of sharpness caused by the aperture) can be corrected.
Caution
Depending on shooting conditions, noise may be intensified together with the
effects of correction.
The higher the ISO speed, the lower the correction amount will be.
For movie recording, [
Diffraction correction ] will not appear. (Correction is not
possible.)
Note
“Diffraction correction” corrects diffraction as well as degraded resolution from the
low-pass filter and other factors. Therefore, correction is effective even at an
aperture close to the open aperture.
[
Diffraction correction ] is not displayed when [ Digital Lens Optimizer ] is set to
[ Enable ].
Caution
General precautions for lens aberration correction
Peripheral illumination correction, chromatic aberration correction, distortion
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.
Magnifying the periphery of the image may display parts of the image that will not
be recorded.
The correction amount will be less (except for diffraction correction) if the lens used
does not have distance information.
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