There is a type of camera where the sensor reacts to changes, not to ‘an exposure signal’. The DAVIS 346 Neuromorphic camera is one such.

Data-sheet: https://inivation.com/wp-content/uploads/2019/08/DAVIS346.pdf

Note the apparent high dynamic range of 120dB – like a 100-image stack from MLO?

Wiki: https://en.wikipedia.org/wiki/Event_camera

How can we use an ‘event-based camera’? Can the camera also be triggered from outside?