ADU v e

Forums Photometry CMOS for Photometry ADU v e

Dr Andrew Smith

You should convert ADU to e using the (inverse) gain in e/ADU for a real measure of S/N. This is probably what your software is not taking into account. The gain does not change the number of photons captured (assuming it’s not saturated ) .

You can quite easily measure the gain in the right units see here for example

Regards Andrew