[mst]

It seems they modified the answer (and I didn't see the initial one). In any case: with a tilt/shift lens, metering and focus confirmation are a good deal off once the lens is tilted and/or shifted. That's both the case for TS-E and PC-E lenses and simply a physical issue (the light rays no longer hit the sensors vertically). In practice, you meter first, lock the exposure and then adjust the lens movements. Focus assist is mostly useless with TS-lenses anyway, since you're usually interested in the whole plane of focus and not just a single spot.



The physical limitations regarding lens movements exist since the PC-E lenses were initially announced. As pointed out by NR, any camera below the D3 is affected by this. The smaller cameras even more than the larger ones, naturally, since their flash housings are closer to the lens mount.



-- Markus