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Fixing Lens Vignetting

Vignetting, an unusual darkness in the corners of images, is the result of the inability of the lens to distribute light into the corners of the image. You can fix lens vignetting in Develop mode by brightening the corners of the image.

You can save your settings as a preset for future use.

To Fix Vignetting:

In Develop mode, select the Geometry tab.
In the Vignette Correction group, adjust your image as described below.

You can right-click a slider to reset to the default value.

Vignette Correction Options

Strength	Adjust how much the corners of the image will be brightened.
Radius	Adjust the distance from the corners of the image that pixels will be brightened. The higher the radius, the closer to the center of the image pixels will be brightened.

Click the Show Grid button to display a grid over your image. This tool is useful when fixing alignment in your images. When the grid is not activated, it is gray .