Leaf Aptus-II Calibration Manual page 6

Lens Calibration Guide
Notes:
 In the example above Leaf Capture has limited the lens falloff correction
to 60%. You can reduce this number as desired.
 The falloff correction is applied for this load only.
The name and path of the Lens Calibration and the % Falloff correction used, will
appear in the Image Info of images shot with the Lens Calibration.
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