This has nothing to do with crop-sensors. The TS-E 24mm has a 67mm image circle, which is more than large enough for full frame sensors.
The difference with the new Canon TS-E lenses is that they can independently rotate on both the tilt and shift axises, vs. the tilt axis having to be 90° from the shift axis with the older generation lenses.
I didn't say it had to do with crop sensors, I said the APS-C bodies don't have enough for the full movements.
It doesn't *have* to be 90 degrees off, Nikon will modify the lenses to have them on the same axis, and typically folks shoot one way or the other. While the Canon's new lenses offer user-adjustability it's more of a "nice to have" for most folks and is only on the newest Canon lenses.
Well, like most people, I have no intention of chasing down the medium format path. I'm only interested in this as a creative, additional lens for a dSLR.
If you'd followed the link, you'd see that it has
nothing to do with medium format cameras other than being able to use their lenses, the body/bellows units work with DSLRs, and besides tilt/shift you get swings just like with a large format view camera, and you get to use view camera, Hasselblad or Mamiya RB lenses depending on lensboard (normal or recessed) and adapter (if using Hassy/Mamiya lenses,) giving a lot more choices in terms of focal length. Since the DSLR has a shutter, the LF lenses don't even have to be mounted in shutter.
I've been looking at the X2-Pro for landscape work.
Here's the difference:
X2-Pro: Vertical Shift 17.5mm up/down
Horizontal Shift 17.5mm left/right
Tilt 20 degrees up/down
Swing 20 degrees left/right
Focal range: 28mm-150mm (really nearer 90-150 except for the retrofocus Schneider 28mm I think.)
Canon 24mm:
Shift 12mm
Tilt 8.5 degrees
Canon 17mm
Shift 12mm
Tilt 6.5 degrees
Plus you get rear standard movements on the X2, and the Schneider and Rodenstock digital lenses are pretty-much
unequaled anywhere. I'm also looking at the Horseman LD series, which looks like it may go longer than 150mm and still accepts the retro-focus 28mm.