A veteran war photographer with PTSD sees imminent deaths in his developed photos, questioning his already fragile sanity and putting the lives of those he loves in danger.
Camera Obscura is more psychological thriller than horror -- in fact, it's not scary at all but there are enough moments of suspense and mystery to make it worth your while.
One of the strongest elements in Camera Obscura is that, regardless if Jack is losing touch with reality or the camera is haunted, the whole story is itself a metaphor for the horror of PTSD.