Based on the title and opening paragraph, I excitedly thought this would cover the manufacture of the sensor or lenses — you know, the things without which you don’t have a camera at all.

Perhaps a more accurate title would be “Salvaging a broken ‘FLIR One’ to make a thermal vision scope!”

Still a very cool project! Too bad it’s not reproducible at this cost though (this was more affordable than commercial products only because the author managed to buy a broken ‘FLIR One’ cheap on eBay, and salvage the sensor).