I recently bought two vintage Leica lenses. I shoot mainly film, and was tired of the hyper-sharp rendering of my modern glass on my M10. So, I bought a Summaron f/3.5 35mm and a Summarit f/1.5 50mm. The Summaron is more highly rated, but I absolutely love the rendering of the Summarit on my M10. It's really rekindled my interest in digital. Both are screw (LTM) mounts, and the adaptors are quite cheap. I don't know if there's LTM to Sony or Fuji adaptors directly, but you could then go LTM to M to your camera.