Tag Archives: photoelectrons per pixel

How Many Photons on a Pixel

How many visible photons hit a pixel on my sensor?  The answer depends on Exposure, Spectral power distribution of the arriving light and effective pixel area.  With a few simplifying assumptions it is not difficult to calculate that with a typical Daylight illuminant the number is roughly 11,760 photons per lx-s per \mu m^2.  Without the simplifying assumptions* it reduces to about 11,000. Continue reading How Many Photons on a Pixel