How good would the experience be with a linux phone and an external camera?
I've got a pixel 6 and although camera's are getting better each year, it's not even close to a dslm. And video qualit is probably better with a proper action camera.
I mean, directly "mounting" the camera to the phone and shooting with the phone.
i feel like this would just be better served by having a phone and a camera. a good large camera will continue to be a good camera for years and years past the time the phone is too old to be useful for modern needs. my almost 20 year old DSLR still outperforms my phone camera, and my phone is quite recent.
Most nice modern cameras have either USB, bluetooth, or even wifi connectivity to connect to whatever you want. You could just have a normal phone and a normal camera and just copy the files off via whatever method you prefer.
Excluding some of the smaller point and shoots, which are still more volume than most phones, DSLRs and Mirrorless cameras are way bigger than phones for a reason. It's because that's what it takes to take actual high quality pictures without cheating heavily with processing.
my point is that you might as well just have the phone be separate at that point. instead of having to frankenstein them together just have two devices. also, last i checked the linux experience on a small handheld device is not something you’d want to subject yourself to daily. android is much more what you’d want.