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An Open Source Mirrorless Camera You’d Want To Use
(hackaday.com)
This is a most excellent place for technology news and articles.
I'd think they'd handle this with calibration. It doesn't need to be as sexy as commercial, it just needs to have a reasonably easy process to fix it.
Something like when you get a new lense, you aim it at a laser difraction pattern on a clean wall.
Now you don't worry about minors differences in body or lenses.