I'm not sure it's worth it. I've tried some Nikon PC lenses and the results aren't acceptable besides for novelty value. And I'm not sure shifting adaptor would be much chop, I've got the Samyang 12mm about the same fov as the 17mm ts-e and the results aren't good enough for architecture (without an adaptor) I recently hired the Canon 17 ts-e and put it on an old 5d mk2 and the results are just immediately top. My conclusion, if you need the results such a lens can provide, then an older Canon is a better idea (i'm talking really about shifting for architecture but I suspect the same would go for product photography. Effect portraits etc are probably a different story) unless you go for a view camera option like the Cambo then is say the Canon is the only viable option
