I have two cameras and know the specified minimum faceplate sensitivity for both:
Camera 1: Minimum faceplate sensitivity 4 x 10-6 Lux
Camera 2: Minimum faceplate sensitivity 2 x 10-7 lux
I also know the minimum intensity (1 x 10-7 W m-2) of a point source (470 nm) visible to Camera 2 at a distance of 0.5 m from the front of the camera (ambient light levels: zero).
I would like to be able to calculate the minimum intensity of a point source visible Camera 1 through the same medium (seawater). (Camera 1 is no longer functional and so cannot be calibrated)
Although there would obviously be a number of factors that would add error into this calculation, is there a way to calculate this (supposing ideal conditions)?