With regard to Closer, I found some details relating to Julia Roberts' photography a little odd, if not necessarily incorrect.
Firstly, when we see her view of Jude Law through the Hasselblad's waist-level viewfinder, surely it should be inverted. (I say this as someone who has never used a Hasselblad, or any other medium format camera for that matter, with any kind of viewfinder, so am quite prepared to be shot down in flames).
Secondly, when she switched to the Leica, I was surprised by how loud the shutter sounded. (Believe it or not, I say this as someone who, while clearly aspiring to , has never used a Leica, but was under the impression that the quiet shutter was one of its legendary strengths. I am, however, prepared to be corrected).
Finally - and I think I am at least on firm ground here - in her exhibition we saw the picture she took of Natalie Portman with the Leica, and it was in the same square format as the Hasselblad shots. While clearly feasible, this does raise the question of why, if you want to display your pictures in square format, you would use a 35mm camera.