a roundup of camera-centric movies
... from DPReview
they forgot a few though, such as Triage (a.k.a. Eyes of War), Shots of War (a.k.a the Bang-Bang club), Blow-up, Life, the Secret Life of Walter Mitty, etc.
and that's not counting the planned or yet-to-be-released movies on Lee Miller (some random article about her) and Lynsey Addario (this is her website)