You guys have been so much help. I really like the look of the Retina. I hadn't really decided on really how old the camera was going to be until I really knew much about the wide world of photography. If this book ever gets published I will be sure to thank all of you in the acknowledgements.

I think I also found my next obsession.
How early was 35mm film available to the general public, as in just pop on in to a store and buy it. I think my character is going to run out of film and the only way to get back to her own time is to refill. I don't want it to be too easy, but I also don't want her to be stuck with no way home.
Also it is set in Denver area where she buys the camera. Is there a camera with the name of Majestic? The time travel will take her anywhere in the world though, so the question about the film applies to worldwide.