I am able to tell the difference between a Nikon F and a Pentax Spotmatic. I can differentiate between a Nikon F, F2 or F3 but that's about it. I am not enough of a camera spotter/anorak to tell the difference between models of other manufactures like Minolta, Canon, Olympus, etc. I have always been a Pentax guy - never gave the competition a second look.
There are things about (old) cameras in (old) movies that annoys me. When I see an actor using an SLR camera in a movie, I am often struck by how vigorously the focus ring is rocked back and forth. The sound guy will add a motor drive sound to the final mix, even if there was no winder attached. Everybody knows what sound a camera makes and they have to fix it. And then there is the number of frames that the hero is able to shoot in the heat of the moment. No thoughts of running out of film, it's a movie.