Have a look at the Reflex, a new project on Kickstarter: Reflex: Bringing back the analogue SLR camera Do we need yet another 35mm SLR? Well, no, we don't. But there is no SLR with a conventional form factor with interchangeable film backs and interchangeable lens mounts. The Rollei 2002 is great but it is not common and it is not cheap. Buying used cameras is fine but there's nothing wrong with a brand new camera, either. I don't like the built-in flash and LED, and I think they are stupid. But those are minor issues. I wonder why not one manufacturer thought about implementing interchangeable backs like this. I mean, you could get 250 exposure magazines for some cameras but that's a different thing. So many photojournalists, especially sports photographers, would have loved to have interchangeable backs. It would have reduced, and occasionally eliminated, loading and rewinding in the field.