Well, at least I can join here!
I put together a budget tilt/shift setup on the advice of RawHeaD (member around these parts), using a medium-format wideangle lens (which becomes a medium-long lens on Pentax APS-C) and two Ukrainian adapters.
The parts below are:
- a very sharp Carl Zeiss Jena 50mm f/4 Flektogon (in Pentacon-six mount)
- a Shift adapter from Pentacon-six to Pentax K
- a Tilt adapter from Pentacon-six to Pentax K
All acquired on "the bay" for ~$350 USD.
(The "speckling" visible behind the Flektogon front element is very common, but has no effect on the image quality.)
The adapters preserve infinity focus of the medium-format lens perfectly, and allow for a range of movements - up to 8 degrees of tilt or 10mm of shift in any direction. The "any direction" part is because each adapter (with tilt or shift) can be "rotated" around the lensmount in 15 degree increments while shooting. This is sometimes called the "Hartblei" design, since it is similar to their Superrotators.
Full tilt!
Shifted!
Produces some interesting effects, even though the 50mm focal length is a little long for a cropped-sensor camera. Still finding my way with tilt/shift, but I'm liking the effects so far.