Correcting dramatic distortion with the Lens Correction filter or ACR
Most lenses distort the subject to some degree, but it isn’t always noticeable unless there are straight lines in the scene. Architecture is often an issue, and a bending horizon in a seascape stands out like a thumb that’s been hit by a large hammer.
This shot was taken on a full-frame Canon 5D Mark II with a 15mm fisheye lens mounted and as a result there’s very pronounced barrel distortion which makes the horizon bend like a banana.
Fortunately, there is a correction profile for this lens – just placing a tick in the Enable Lens Profile Corrections box in the Lens Corrections section of Camera Raw, or the Geometric Distortion box of the Lens Correction Filter’s Auto Correction tab is enough to straighten everything out.
This is lucky, as pushing the Manual Distortion correction over to the far right (+100%) isn’t sufficient to straighten the horizon.
However, less extreme distortion can be corrected quickly by sliding the manual control over to the right to remove barrel distortion, or over to the left to deal with pin cushion distortion.
PAGE 1: Adobe Camera Raw Lens Corrections
PAGE 2: Apply vignetting with the Lens Correction filter or ACR
PAGE 3: Correcting dramatic distortion with the Lens Correction filter or ACR
PAGE 4: Fixing chromatic aberration with the Lens Correction filter
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