Fast high resolution ADCs, which anyone can simulate using fast enough low res sampling (any serdes for modern buses) and some math. Thermal cameras can be sold up to a certain refresh rate but not higher.
It’s not really about the tech so much as it is about making it difficult and annoying to work around.
Yep and it’s incredibly broad. I used to work in one of those shooting ranges in Vegas where tourists go to shoot machine guns. We were told that anything more than “barrel pointed this way, this is the trigger” with a foreign national (which were a LOT of customers) could be construed as “training” and thus a potential ITAR violation.