I have one with Nikon and Leica mounts. It's the same lens with different flanges screwed on the back - extra flanges can be had from Schneider (non-Leica ones) or Leica. It's an OK lens. A little distortion at full 11 mm shift but that's no big deal. Usable hand-held. Dedicated hood and filters are a little pricy if you go for the B+W ones. Standard 67 mm filters and hood are no good if you use shift.

Best,
Helen