| | h1. Compensate for chromatic lens aberration |
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| | _Chromatic aberration_ is a common defect caused by the failure of the lens to focus different colors to the same spot. In one type of chromatic aberration, the image from each color of light is in focus, but each image is a slightly different size. This type of aberration is seen as a complementary color fringing in areas away from the center of the image. For example, you may see a red fringe on the side of an object toward the center of the photo, and a cyan fringe on the side of the object away from the center of the photo. |
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| | !dv_07.png! |
| | _Original photo with blue/yellow fringing (left), and after fixing chromatic aberration (right)._ |
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| | # Zoom in to an area near the corner of the photo. For the best results, the area should contain very dark or black detail against a very light or white background. Look for color fringing. |
| | # In the Lens Corrections panel of the Develop module, adjust one or both of the following sliders: |
| | #* *Red/Cyan* Adjusts the size of the red channel relative to the green channel. This compensates for red/cyan color fringing. |
| | #* *Blue/Yellow* Adjusts the size of the blue channel relative to the green channel. This compensates for blue/yellow color fringing. \\ !tip_help.png! _To see more clearly the color fringing you are trying to correct, press Alt (Windows) or Option (Mac OS) as you move a slider to hide any color fringe corrected by the other color slider._ |
| | #* *Defringe* Choose All Edges to correct color fringing for all edges, including any sharp change in color values. If choosing All Edges results in thin grey lines or other undesired effects, choose Highlight Edges to correct color fringing only in the edges of highlighting where fringing is most likely to occur. Choose Off to turn off defringing. |
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| | [Learn more|Compensate for chromatic lens aberration - Learn More] |
