I'm curious if there are any good methods for correcting lens distortion. Like can I print a poster, take a photo and use that to create a correction map?
https://www.dxo.com/technology/lens-distortions/
The way it works, iirc, is you can choose the model of your lens and the software fixes things. Works for professional lenses, unsure about others.
For more advanced stuff, look up CAHVORE models and related models.