I know, I know, it can be caused by various factors, like high ISO, poor lighting conditions, long exposure time, heat. (not that I know why the last two cause noise)
But where does noise REALLY come from? What is noise? What does it have to do with photons and photosites?
It’s said that disgruntled painters found a grimoire in the 1800s and cast a curse upon photography for all of time
Satisfied French noises