There are Photon-counting Cameras but they can not be used when there are allot of photons. As an example; the max nr of photons per second and pixel from one o

There are Photon-counting Cameras but they can not be used when there are allot of photons. As an example; the max nr of photons per second and pixel from one of the commercial ones is 10^7 photons/s/pixel.