Canon EOS 5D MARK IV, Инструкция по эксплуатации

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207
Peripheral light fall-off is a phenomenon that makes the image corners
look darker due to the optical characteristics of the lens. Image
distortion due to optical characteristics of the lens is called distortion.
Color fringing along subject outlines is called chromatic aberration. And
decreased image sharpness due to the aperture is called diffraction
phenomenon. These lens aberrations can be corrected. The Digital
Lens Optimizer can correct the various aberrations caused by optical
characteristics of the lens, diffraction phenomenon, and the
deterioration of resolution caused by the low-pass filter.
By default, the [
Peripheral illum corr ], [ Chromatic aberr corr ], and
[ Diffraction correction ] are set to [ Enable ], [ Distortion correction ]
and [ Digital Lens Optimizer ] is set to [ Disable ].
If the lens correction data is registered (saved) in the camera,
peripheral illumination correction, chromatic aberration correction, and
diffraction correction will be done even in the <
A
> mode.
If the setting screen displays [ Correction data not available ] or the
[ ] icon, it means that the correction data for the respective lens is not
registered in the camera. See “Lens Correction Data” on page 213.
1
Select [Lens aberration
correction].
Under the [
z
1 ] tab, select [ Lens
aberration correction ], then press
<
0
>.
2
Select [Peripheral illum corr].
3
Correction of Lens Aberrations due
to Optical Characteristics
N
Peripheral Illumination Correction