This movie follows the "Novikov self-consistency principle" SPOILERS

"Novikov self-consistency principle

The Novikov self-consistency principle expresses one view on how backwards time travel could be possible without a danger of paradoxes. According to this hypothesis, the only possible time lines are those entirely self-consistent—so anything a time traveller does in the past must have been part of history all along, and the time traveller can never do anything to prevent the trip back in time from happening, since this would represent an inconsistency. Nicholas J. J. Smith argues, for example, that if some time traveller killed the child who lived at his old address, this would ipso facto necessitate that the child was not the time traveller's younger self, nor the younger self of anyone alive in the time frame that the time traveller came from. This could be extrapolated further into the possibility that the child's death led to the family moving away, which in turn led to the time traveller's family moving into the house guaranteeing that the house later became the home the time traveller would then grow up in, forming a predestination paradox.

Seth Lloyd and other researchers at MIT have proposed an expanded version of the Novikov principle, according to which probability bends to prevent paradoxes from occurring. Outcomes would become stranger as one approaches a forbidden act, as the universe must favor improbable events to prevent impossible ones."

So, essentially, all of the things the camera was taking photos of were going to happen no matter what. What the chick tries to do at the end would have never worked because there is only one time line, their time line, and nothing they do can prevent what is going to occur. This is Destiny. They were always destined to find the camera, the guys were always meant to die and she was always meant to go to prison. She was never going to be able to change that. I thought this was excellent and pretty thought provoking.

By the way, I am right behind you.