Originally posted by KungPOW I'm wondering that myself. I think I also saw a rumor that the 60-250 is FF. Maybe the DA*30 is also.
Pentax can't -- not won't, cannot -- go full frame without a sensor.
All the makers of full frame sensors are also camera manufacturers. This means that Pentax cannot differentiate itself as a brand using some else's full frame sensor. (They'll get the sensor after it has shipped in someone else's camera.)
So until Samsung produces a full frame sensor -- not before 2010 is what Samsung says about that -- there cannot be a Pentax full frame camera. (Sony wants to throw Pentax an anchor, now, not a life ring. They're spending a lot of money to sell the A900 for 3 grand.)
Since Pentax is talking about small, weather sealed, and rugged cameras, they presumably are either making a virtue of necessity or don't want a full frame sensor. For the next two years at least, sales are going to be very price sensitive, so that's hardly surprising.
Also note that you can beat full frame IQ with APS-C if you're a couple process generations ahead in sensor manufacturing; if the K30D is APS-C with a sensor that uses shaved silicon and/or various other advanced processes now used in (10 KUSD and up the each) scientific sensors, it's quite possible that they'll be able to beat the performance of the 135 format sensors.
I have no idea if that's going to happen, but Samsung is a chip and fab company; they have a lot of very good silicon process engineers, it's a core competency. So I wouldn't be all that surprised if something like this happened.