Notes about cameras.
I've sold all of my Canon DSLR gear to downgrade to a lighter setup. I'm now using a Fujifilm X-T3 with the 23mm f2 and 35mm f2 weather resistant lenses.
Making a Camera
https://www.crackedthecode.co/how-to-use-your-dslr-as-a-webcam-in-linux/: use dslr as a webcam on linux. Operating Systems
i made some progress on this; added the kernel module and got that working, but it's not clear whether i was using gphoto2 properly. revisit!