Micro adjustment of the fate?..
The way they try to replicate the scene captured in the future photo by that camera, it'd be never the exactly the same scene even they try to do it.
Let's say about the painting for example. You've got a photo of a painting but to match it perfectly, it's impossible, misplace 1mm in any stroke, the painting wouldn't be the same. Same thing with all the precision of their position in the photos, just 1mm misplace from the perfect position, everything will not be the same (and how they even got the perfect position at all? it's perspective sensitive and harder than 2D painting. Also there's a scene in movie that the girl try to adjust her friend position, how he didn't know it himself?... if he needs someone correct/adjust him then how every other time, they could do it themselves??).
Talk further, if the painter try to paint the painting as accurate as he could, then in 8 o'clock he would done it or not? If he done it, then not really matter whether he tried or didn't try, the fate is "he will definitely done the painting" (and the fate has to do micro adjustment to his arms to make 100% perfectly match painting). So it's not about try to replicate the scene in photo, because your attempt alone couldn't do it anyway. The success of you doing it was written in the fate itself, and you just decided to do or not to do (do you even have free will to decide or not for yourself)? Every details you come across along the way to trying to do thing always done as it supposed to be done. Sorry about my English, not my native one.