Back in the days of film, the system camera was a big thing. The camera was basically a box, you attached a back to it holding the film, and a lens and a viewfinder.
Ricoh made an attempt to make a modular digital camera, basically a body which you could then mount different sensor and lens combinations.
Now we have this from Sigma. For the basic body, it really is basic, a tiny small body.
Available is a viewfinder, two sizes of bolt on handgrips and other accessories. Its a fascinating concept.
Shot taken with my V System Hasselblad.
This camera seems focus for video but is an interesting solution for those needing stills too.