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Joined 6 months ago
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Cake day: July 3rd, 2024

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  • Dark table corrects lens distortion based on the design of the actual lens, not the image itself. The grid it just to check in after the fact. I’m not aware of similar tools in GIMP. It’s trivial in Darktable though, as long as your lens is in the database.

    Don’t use a fish-eye lens, it’s lense distortion will be the worst and most difficult to correct. Use a lens with a longer focal length, ideally a prime lens with a fixed focal length. If you maximize focal length and distance to your object as much as is feasible, you will have already flattened the image (minimized lens distortion) a lot. If you use a prime (fixed focal length) lens from a popular brand, Darktable can remove the remaining lens distortion.

    You can remove all lens distortion by using a pinhole camera, which has no lens. But that’s probably going to be a tricky setup without an expert.