Photography

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A place to politely discuss the tools, technique and culture of photography.

This is not a good place to simply share cool photos/videos or promote your own work and projects, but rather a place to discuss photography as an art and post things that would be of interest to other photographers.

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Where does noise really come from? (alien.top)

submitted 11 months ago by VexTheMaster@alien.top to c/photography@viewfinder.pro

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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?

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[–] tricularia@alien.top 1 points 11 months ago

high ISO doesn't cause noise, it just amplifies it.

I think of it like trying to listen to a really quiet video or audio file on headphones or speakers. You can keep turning it up until you can hear what sounds are on that file. But you will also be turning up the background white noise