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Lens Aberration Some lens characteristics could cause the periphery of images shot to become darker than the center, or cause the subject to be distorted. In such cases, you can use the lens aberration correction function of Digital Photo Professional.
Using this function, you can improve the following phenomena, which cannot be completely eliminated in the lens structure, to make images that are closer to what you intended.
Phenomena that can be corrected:
ã»Diminished peripheral illumination (the amount of light at the periphery of an image)
ã»Distortions (distorted lines)
ã»Chromatic aberration (color fringing that occurs in the periphery of an image)
ã»Color blur (blue or red color blur that sometimes occurs at the edge of the highlighted area of an image)
ã»Diffraction (decreased image sharpness of an image)
NOTE
- You can also correct RAW images taken with the compatible lens even when the extender is attached.
- You can also correct RAW images shot with EF 50mm f/2.5 Compact Macro fitted with Life Size Converter EF.
- The aberration correction function is not available for images shot with a lens other than those given under "Compatible Lenses". They are therefore not displayed and cannot be used.
- The lens aberration correction function is not available for multiple-exposure RAW images created on the camera.
- EF cinema lenses (CN-E lenses) are not compatible.
Correcting Lens Aberration Follow the procedure below to correct lens aberration.
1. Start Digital Photo Professional Ver.4.x and display the main window.
2. In the main window displayed, double-click the RAW image in which you want to correct lens aberration. The edit screen and tool palette appear.
REFERENCE
When the tool palette is not displayed, select the [View] menu on the toolbar and then [Tool Palate].
3. Select the [  ] tab, then select the items you want to correct.
4. This explanation shows an example of correcting [Peripheral illumination] and [Distortion].
5. The image is corrected and redisplayed.
To adjust the correction amount, drag the slider from side to side.
REFERENCE
You can correct red chromatic aberration with the [R] slider or blue chromatic aberration with the [B] slider in [Chromatic aberration].
6. The result of the corrections is reflected in the image in the edit window, and the image is redisplayed.
Also, in the main window, the [  ] mark is displayed on the image to indicate that the lens aberration correction is applied.
Thumbnail Image Displayed in the Main Window
NOTE
Shooting Distance Information Slider
- When correcting RAW images and if shooting distance information has been saved to the image, the slider is set automatically according to this shooting distance information. However, if no shooting distance information is saved to the image, the slider is set automatically to the infinity position at the right end and a [ < ! > ] appears above the slider. If the image's shooting distance is not infinite, you can minutely adjust the distance by operating the slider while looking at the screen.
- For RAW images shot with MP-E 65mm f/2.8 1-5x Macro Photo or EF 50mm f/2.5 Compact Macro with Life Size Converter EF, the slider indicator changes to [Magnification factor].
- The [Shooting distance information] slider is applied to all the correction items with check marks.
- If the lens requires no adjustment with the [Shooting distance information] slider, the slider cannnot be used.
This completes the procedure for correcting lens aberration.
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