an observer in the northern hemisphere takes a photograph, which direction was the camera pointing?

Answer 1

If you are standing on the geographic North Pole, you are looking south. Every way you look is south, so east and west are irrelevant. Anywhere else, the camera is pointing in whatever direction you point it.

Answer 2

Not enough information. Even at the north pole, if you are looking straight up or straight down, that is not south, so there is no unique answer to your question.

Answer 3

south west=south east=south south=south