The purpose of a photograph has changed so much since the technology was first used. As an illustration take the difference between a portrait from the 1800s and a present-day Facebook portrait, whether self-taken or not. Notice the size of the head in the shot’s frame. Notice where the subjects’ eyes are focused. Notice the straightness or tilt of the head, etc. A Facebook shot often gives the impression that the subject is aware of himself, as one glancing into a mirror; this makes the subject more playful, or more willing to play a part; it makes the subject’s pretenses greater and yet less definite.
Curious that such technology suggests both a claim on facticity and an escape from it.