Pentax K110D Operating Manual page 90

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Setting the Lens Aberration Correction
Set using the Lens aberration correction panel.
[Marginal lumination compensation] tab
Adjusts marginal lumination of the image.
Item
Lens angle of view
Compensation
[Distortion Correction] tab
Corrects distortions (lens aberration that photographs straight lines as
curved lines).
Item
Correction balance
Compensation
[Lateral Chromatic Aberration Correction] tab
Corrects lateral chromatic aberration in which there is a difference in the
image magnification and image size due to different color wavelengths at
the image margins.
Item
Red compensation
Blue compensation
Description
Sets the viewing angle of the lens used when shooting.
Slide to the left to make the marginal lumination linear at
the center portion of the lens, and slide to the right to
correct the outer portions of the lens.
The slider sets the compensation level. Set the
compensation level between –50 and +120. Slide
towards – for darker and + for brighter compensation.
Description
The slider adjusts the distortion correction level between
the center and margins of the image. (Slide to the right to
widen the range.)
The slider sets the compensation level.
Description
The slider adjusts the magnification of red light.
The slider adjusts the magnification of blue light.