Originally posted by ManuH Really? What else do you really need? fps? it's still much faster than the 5D mk. II. The question is more how much bigger than a K-5 it has to be to accommodate a FF sensor.
If you have been reading my comments, it's not about what I need, or you, or anyone else. It's whether there is a viable market, which is the aggregation of what a specific target market wants.
I have already said I'll happily buy a full frame camera from Pentax if they choose to release it, no matter in what shape or form. Heck, all they really need to satisfy me is to paint the body pink and stick a Hello Kitty icon on it. I basically told them that last time I saw them (at the PMA booth) and we had a good laugh about it - they know me well. They keep calling me the Hello Kitty camera girl on Facebook.
A viable market will require more than just "K-5 with a FF sensor" (my opinion only of course, I have not done the market research and Pentax's market research indicated that the people they were targeting wanted something like a Q).
The K-5 is faster than the 5D Mk II only because it is essentially the electronics from the 645D (large buffers etc. optimised for MF) housed in an APS-C body - that's why it has such impressive fps and number of raw shots in continuous mode.
If Pentax uses the same electronics with a full frame sensor, it may end up as slow/limited as the 5D Mk II. Pentax really needs to move to a new generation of CPU to support a FF sensor - something fast enough to support SDXC UHS-I, be able to take 6-10 fps for at least 2-3 seconds. A really fast and usable Live View (if it is not a mirrorless), semi-pro video controls and support for AVCHD.
That I think will wow the market and create good buzz, and overcome the disadvantage of not being able to use DA lenses.
Remember it's quite likely the 5D Mark III is just around the corner, and given Canon has been losing market share in recent years and Sony's new camera announcements, this really needs to be a game changer for Canon. Canon already has the advantage that USM is so much better than SDM.
So all in all, now is the wrong time for Pentax to release an FF camera. Much better to wait until the hype around the Sonys and the 5D Mark III die down, then leapfrog them :-)