Canon EOS 90D, Advanced User'S Manual

Page: 209 / 646

209
Correction of Lens Aberrations due to Optical Characteristics
Chromatic Aberration Correction
Chromatic aberration (color fringing around subjects) can be corrected.
o [Chromatic aberr corr]
is not displayed when
[Digital Lens Optimizer]
is
enabled.
Diff raction Correction
Diff raction (loss of sharpness caused by the aperture) can be corrected.
o
Depending on shooting conditions, noise may be intensifi ed together with the
eff ects of correction.
o
The higher the ISO speed, the lower the correction amount will be.
o
For movie recording,
[Diff raction correction]
will not appear. (Correction is
not possible.)
o
With “Diff raction correction”, degraded resolution due to the low-pass fi lter, etc.
is corrected in addition to diff raction. Therefore, correction is eff ective even at
an aperture close to the open aperture.
o
[Diff raction correction]
is not displayed when
[Digital Lens Optimizer]
is
enabled.