Originally posted by Asahiflex That 3D printed FF prototype is very unusual for Pentax. What gives? All prototypes up to now have been made from the real material. This can mean two things:
1. The design is far from ready as if they started just yesterday;
2. They want to keep the competition in the dark as much as possible, without showing too little to the Pentax customers.
When the 645D was in the prototype stage it always looked like a finished product. Pentax could get away with that because in that field (middle format DSLR) there is almost no competition, especially not from Canon and Nikon. In the case of the FF however, secrecy is key. The 3D product as it is now probably won't trigger Canon and Nikon enough to take notice of Pentax. And who knows, the camera might show up sooner rather than later. It's all part of the plan to deceive Canikon and keep existing (and old) customers happy.
They didn't start development yesterday. Like I've been predicting for a while now, this is likely based off much the engineering effort that was put into the 645Z. It only makes sense. I really doubt that Nikon or Canon care as both companies are trying to stave off diminishing sales. It's a huge advantage that Pentax is small and has the backing of such a large company. It will enable them to release a new MF camera and FF camera in the span of only two years or so.
I think that the internals are probably largely finished at this point again, due to the existing 645Z tech. That's why they don't have a version with a better case quite yet.