Originally posted by scotty707 Why not a slim mirrorless that has a "short" K-mount that is physically the same as the original K-mount, but with a shorter flange distance. Then all they would need to do to maintain compatibility with "long" K-mount lenses is include an adapter that extends the electrical and AF contacts to the original K-mount distance. When the 4/3 system came out, it was created for DSLRs. Then they went to Micro 4/3, which uses the same sensor, but the flange distance is shorter. The physical mount is different, but 4/3 lenses are fully compatible electrically with Micro 4/3 with an adapter.
I doubt they would like to use mechanical linkage for aperture on a mirrorless system, and it might be difficult to fit a screw drive AF in a slimmer body.
K-mount is in may ways an outdated mount if going to mirrorless, so compatibility for K-mount would have to be built-in in the adapter, not camera.
Just check how Sony did for full compatibility on adapters for A-mount lenses on E-mount cameras..
The difference compared to 4/3 mount is that this mount was already a modern mount with all controls between lens and camera is electronic, so it was much easier to make full compatibility between 4/3 mount and MFT