falconeye:
Indeed, you haven't said anything about a mirror lens - others did. Sorry for not being clear.
IMO the most probable scenario is: this lens will be good, and relatively affordable. I don't expect it to be the best, though; probably that 13.000 euro 500mm f/4 Sony will beat it
The most probable scenario is not: we don't know anything about the optics (besides focal length and maximum aperture) but it should be bad, just because Pentax said something about telescopes. Again, I'm not talking specifically about you.
I agree, having reasonable expectations is the best.
Gimbal, you're joking, right?