Apply Lens Corrections

Click on the ‘Lens Corrections’ tab and, under the ‘Profile sub-tab, tick ‘Enable Lens Corrections’. Your lens will usually be detected from the database of optics and load automatically, but if it doesn’t, select the ‘Make’ and ‘Model’ from the boxes below. This will correct any distortion and remove vignetting (darkening at the corners of the image) caused by the optics.

Now tick ‘Remove Chromatic Aberrations’. Doing this will automatically minimise any coloured fringing on high-contrast edges. Performing this bit of ‘housekeeping’ early in the process will ensure that any subsequent changes are being made to a corrected image.