Using Camera RAW in Photoshop CS
as Your Digital Darkroom, page 12
Removing shadowed vignettes
Both the Vignetting Amount and Vignetting Midpoint sliders are used to correct another lens defect
where the corners of the photograph are darker than the center (Figure 9).
Figure 9: Shadowy vignettes at a photo’s edges (top) are a problem created by the lens.
Photoshop can correct them (bottom).
The Vignetting Amount slider corrects the brightness at the corners of the photo. Moving
the slider to the left makes the corners darker, while moving the slider to the right
brightens the corners.
The Vignetting Midpoint slider is used to adjust how the brightness moves from the center
of the photo to the edges. When this slider is moved to the left, the photo appears
brighter in the center and darker at the edges. As the slider is moved right, the brightness
spreads to the photo’s edges.
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