Roxy d'Urban wrote:

Saw a bit of that old Jack Nicholson movie the other night and noticed him
using some sort of a rangefinder camera. I couldn't get the name of it.

Yeah, I caught most of the film the other night too, but missed the
bit with the camera.

Does anybody know what it was?

Good eye. It's a Leica:

http://www.nemeng.com/leica/005ea.shtml

Chinatown (1974) - Jack Nicholson does his stalking on the pond and
motel roof using a III/A and VIDOM finder [36]. In the DVD Extras
section, director Roman Polanski mentions the roof-top Leica scene and
the dilemma they had over whether to reflect the young couple in the
Telyt lens right-way-up or upside-down

--
Ken Tough