I haven’t been active in this space for a few years, but was an avid amateur photog for a while. Regarding calibration, I jumped to color-spaces, but perhaps you want to go the geometry route, or both?
For the color spaces, I have a full XRite system w/ a ColorMunki monitor and print colorimeter for generating icc profiles, and also color standard “swatches” that you include in the image captured (uh, hard to do that with stars and such though!).
Here are a few links that may help, especially open-source tools or that highlight standards in this area: https://www.argyllcms.com/, and software built using that as a base: https://displaycal.net/ this article lists 4 open-source tools: Calibrate your Monitor with these Open Source Tools - LinuxLinks hcfr: hcfr download | SourceForge.net
There’s also a host of tools for camera calibration to test for back/front-focusing (I used vintage and modern rangefinders, which could be a bit tetchy with focusing low f-stop high aperture lenses at times with perhaps only an inch of depth-of-field range when shot wide-open).
Good luck!
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