I'd like to throw my hat into this ring, if I may. I've used many Olympus cameras over the decades, and Olympus did make two versions of their rangefinder, (XA & XA-II.) The XA was the true rangefinder, while the XA-II was a Zone focus. I liked the XA-II because for me it was quicker. (And yes, they both had a seperate flash unit that did mount on the side.) I still have it, and love the way it produces its unique exposures. I still have several OM1's, my original OM10, but mostly I shoot film with my OM4. (I love that camera.) I used to carry 2 bodies, one for film, one for slides, but that isn't necessary any more. I still have a Yashica D (twin lens) that shoots 120, but sadly, I haven’t shot that in years. I’m not even sure where to get 120 film processed now.