Using Camera RAW in Photoshop CS
as Your Digital Darkroom, page 11
Adjusting lens irregularities
The Lens tab panel shown in Figure 8 can only be viewed if the Advanced radio button is
selected. The Lens tab panel is used to correct lens conditions that that create problems with
color focus.
Figure 8: The Lens tab panel helps you correct color and shadow problems created by the camera lens.
Fixing chromatic aberrations
The Chromatic Aberration R/C slider (R/C stands for Red/Cyan) and Chromatic Aberration B/Y slider
(B/Y stands for Blue/Yellow) are used to correct color problems at the edges of a digital photograph.
Sometimes the colors at the edges of a photograph don’t line up, causing what is called fringing.
This fringing can create a colored halo effect that is very subtle. In order to see if your photo
has fringing, you need to zoom in on one of the edges of your photo at the highest magnification,
400%. Slide the Chromatic Aberration sliders back and forth to test how this fringing looks.
Return the sliders to a position where you don’t see any color halos.
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