I think I used or tried intensively nearly every tilt/shift option option available for dslr:
- Canon's TSE lenses
- a Linhof 679 adapted to Canon
- a mirex Tilt/Shift adapter with Mamyia Glass
- a X2pro with LF lenses
- a Mamiya Tilt Shift Bellows with LF lenses
- The Zörk multifocus system with Rodagon lenses
- a Sinar P (don't remember which)
- Hartblei
My Work is depending 90% on movements, but I had to realise, that non of the alternative systems offer any real advantage over the TSE lenses, that are worth the massive hassle and weight. The mirrorbox of a DSLR kills most extreme movements and as the centre of rotation of the sensor(=back standard) is careening too much, stronger movements need adjustments of the whole assembly. Only front tilts are rather easy.
The most capable system I used was the Linhof, but it was huge, heavy and slow, but the Addition of the Mirex allowed to compensate for the depth of the mirrorbox.
Second best is the Mamyia Tilt Shift Bellows, I have one adapted to Canon lying around, if anyone is interested send me a message
My Advice for anyone wanting movements on a DSLR is a Canon or Nikon with T/S lenses and an Arca Cube or Photoclam Multiflex, tethered to a laptop.
Canon's 17mm and new 24mm TSE are unbelievable good, the 45 is mediocre and the 90mm is acceptable, but falls off in short distances. I am eagerly awaiting a replacement of the two latter ones, but I fear it won't happen for a while.