Setting up the Samyang 8mm is independent of the choice of camera.
I have put a diagram of the behaviour of the lens on www.hugha.co.uk on a page at: http://www.hugha.co.uk/NodalPoint/Index. htm
For more information click the link to http://michel.thoby.free.fr/SAMYANG/...%20report.html
The choice of where to set the NPP (No Parallax Point) depends on whether you chose to shoot 6 shots round or 8 shots round.
I go for the bigger overlap with 8 shots round as this gives more common area for control points and more scope for using the Mask tool, but others perefer 6.