Do all rangefinders provide interchangeable lenses?
Good point. Probably the majority of rangefinders that have been sold do NOT provide interchangeable lenses. They have a fixed and non-removable lens and a leaf shutter. There are a number of models with interchangeable lenses, such as the Leica M series, the Fed clones, and so on. While we tend to focus on these interchangeable lens models, the others work very well and at low cost for many rangefinder users too.