I know I'm about to reference a terrible film, but oh well. In 'Vertical Limit' the main character is rock climbing at the very beginning of the movie. He takes a few pictures with an SLR camera, and then holsters it on what seems to be a metal clip on his harness, before continuing his climb. I'm wondering if anyone else has heard or seen one of these before as the only place I've seen one is in this movie and it seems like an interesting item for keeping a camera at-the-ready.
For those who have not seen the movie, here is the opening clip: http://www.youtube.com/watch?v=eqXUQoHzTvI