[Brightcolours]

The lens mount is called Contax RF mount. Nikon S mount is almost the same (oddly enough there were some issues?).

So, Canon RF mount, Nikon S mount to Sony E-mount, EOS M mount, Fuji X mount, MFT adapters.

You can find them in expensive advanced form:

http://www.ebay.com/itm/Kipon-Advanced-A...SwF1dURMPO

 

And in cheap form:

http://www.ebay.com/itm/Camera-Adapter-F...5xnaQOVj3A

 

I do not know the ins and outs of this CRF/Nikon S mount, so I can't explain how it is supposed to work and what the advanced adapters bring you over the cheap ones. AS far as I can figure out, the adapters focus, not the lenses? So the cheap ones won't allow focussing?

 

About the two bayonets: apparently there are lenses with inner mount and outer mount. Go figure.