https://en.wikipedia.org/wiki/Shutter_speed
I can't find any mention of it here, but once I read in a printed comic book, where there was a page of "weird facts", that in the beginning of photography, people had to stand for literally hours, as if somebody was painting a painting of them, for the camera to take the photo.
Is this utter nonsense? If this was ever the case, why on Earth was that ever necessary? I've gone through my entire life assuming that this was the case, but maybe it was one of the "fake facts" which tried to trick the reader. (Yes, they had at least one such every week until they stopped having those pages.)