How do I remove vignetting in RT?
You can also use the Vignette filter in the Exposure Tab of RawTherapee with negative values. This is especially useful if you are using an old manual lens (with an adapter) for which lens profile does not exist.
In editor Go to “Transform/Profiled lens correction”. There you have the choice between LENSFUN (auto matched correction parameters or manual correction parameters) or LCP file.
If neither of those correction include, as it can happen, vignetting correction, you should use “transform/vignetting correction” instead of “exposure/vignette filter” that is just an artistic filter.
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