Originally posted by konraDarnok Why? You could make it identical and release a simple spacer with screw extension and pass thru contacts.
Nope, that wouldn't work because the mirrorless camera wouldn't have a screwdrive motor...unless they didn't want to make it small, but then there's little point to a mirrorless camera. The Pentax MILC would be SDM focusing only, so DA SDM lenses should have no problem focusing.
The big issue is aperture control. All the current MILCs use electronic aperture (meaning there is a small motor inside the lens that closes the diaphragm), which makes sense as mechanical aperture control is very old-school and will eventually die out.
Quote: I'd be awfully disappointed if they abandoned their backwards compatibility.
A Pentax MILC cannot afford to be backwards compatible, it would impose unnecessary restrictions on its design that would make it DOA. This is actually a great opportunity for Pentax to move forward with a vision of the future, which is what MILCs are (whether people are happy with that or not).
The best we can hope for is an adapter like Sony has made for its NEX line. The adapter has a mechanical system that allows for auto aperture, so you set the aperture through the body and the lens gets closed down automatically to that aperture. Focus, on the other hand, is manual.
This would be a good solution because lacking auto aperture is the biggest annoyance when using 3rd party lenses on Panolympus and Samsung MILCs. Manual focusing on rear LCDs is fine, and doing it on EVFs is actually easier than on OVFs (at least for APS-C).
...