The photograph is an abstract kind of entity, the print is one possible medium for its physical manifestation.
Take a famous example, say Smith's Tomoko in her Bath. Someone, a friend who doesn't know much, asks "is this one photo or more?" You might say, "Well it's one photo -- cameras usually only take one photo at a time you know -- and Smith made just this one, without anyone else making more at that time, but there are various prints/copies all over the place. There's one print with museum X, another with museum Y, and then there are all the reproductions in Life and the books made by Smith. But yeah the photograph, that sort of thing which is the likeness of what the camera had in front of it at the time, is one, not many." "So", your inquisitive friend asks again, "where is that one photo?" "Well, about that particular photo, it's where its negative is, but it doesn't really need a negative either because most pictures made these days are algorithms in memory cards. It doesn't have to be anywhere. It's an abstract kind of thing. Well, 'thing' is probably not the right way to put it, but it will do."
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