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Old 10-23-2018, 04:44 AM   #3
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Mgoldman's Avatar
Join Date: Apr 2006
Posts: 3,674

Could simply be lens (or perspective) distortion.

Put up a grid and try to line it up - no one says you can't "pull" just a top or bottom corner. Sometimes it's how it looks vs reality.

Lightroom, btw, has a really nice leveling actions.

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