Originally posted by monochrome Pentax will compete full-pro, including building out (over time) pro-level service and distribution.
They won't immediately cover ALL categories of professional use (i.e. perhaps won't immediately compete in sports/action and/or reportage) but could enter ceremonial, landscape (with dSLR) and studio (with 645D line).
This isn't a single-camera release with a few ageing lenses. It is a long-term commitment and a systematic process of investments and releases to develop a competitive professional alternative that has the Pentax DNA, smaller, rugged, ergonomic intelligence, optics, WS, IBIS, DIFFERENT.
I'm not talking about the future, i'm talking about the start.
If they want to compete with FF in some of the pro segments they simply need to launch the camera with some good basic lenses.
Something like 28-70 and 70-200 f/2.8 would already be enough as a good launch start and with a roadmap for the other lenses.
Like i said, nobody in their right minds will buy Pentax FF if they dont have the lenses for it or can not buy the basic of quality lenses.
ps. 645D is actually more aimed at landscape shooters then any other MF camera, the weather sealing is an example of that.