– What exactly is the “exposure” in photography?

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Like, for instance, I’ve seen photos of the night sky with crazy details of the stars and they say that this picture was taken with “12 hours exposure”. What does that mean exactly and what does it do?

In: Technology

8 Answers

Anonymous 0 Comments

No expert here, but I think it comes from having to expose film to light for chemical changes on the film to happen. The longer the film was exposed to light, the more details you could make out on it.

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