How can a Lightroom 3 preset add dark edges if Post-Crop Vignetting is unchanged?
Asked 9/29/2012
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2 answers
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In Lightroom 3, some presets darken the edges of my photo, but I don't see any change in the Effects panel under Post-Crop Vignetting, and nothing obvious in Lens Corrections at first glance. Where else can a preset apply a vignette-like darkening, and how can I identify which setting it is using?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
14y ago
2 Answers
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If you open the plugin file in a text editor, you can see all the settings associated with the preset. In the case of this one, I can find the following:
VignetteAmount = -100,
VignetteMidpoint = 0,
Which suggests that it's not using 'post-crop vignette' but the lens correction vignette instead. You could verify this by applying the preset, and checking the value under 'Lens correction > Manual > Lens Vignetting'.
In my opinion this is a poor choice, as applying the effect to a cropped image would only apply vignetting to the uncropped version, so e.g. if you cropped the bottom right off the image, the top left would be darker than the other corners, making it look odd.
Originally by user456. Source · Licensed CC BY-SA 4.0
user456
14y ago
0
Generated from our catalog & community — verify before relying on it.
A Lightroom 3 preset can darken the edges using the Lens Corrections manual vignette controls rather than Post-Crop Vignetting.
One way to confirm this is to inspect the preset file in a text editor. In the example given, the preset contains:
VignetteAmount = -100VignetteMidpoint = 0
That indicates it is using the lens vignette settings, not the Effects panel’s Post-Crop Vignetting. After applying the preset, check: Lens Corrections > Manual > Lens Vignetting
That’s likely where the edge darkening is coming from.
A practical difference is that lens-style vignetting is based on the original image area, while Post-Crop Vignetting is applied after cropping. So if you crop heavily, lens vignette can look uneven or odd compared with post-crop vignette.
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