This will be the first full frame Pentax DSLR. Something to celebrate!
(Pity that there are still a small number of trolls on this site, but that's life
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Perhaps like their first DSLR, the *ist D, it will be fully loaded and priced accordingly, with a follow up lower spec models which, like the *ist DS and DL, will be built to a price.
To me, it looks like it might be a game changer, (like the HMS Dreadnought if you will). It offers excellent functionality when you want it, is customisable, has most of what Pentaxians have asked for, but is still able to be used like the K-5 and K-3 which we have become accustomed to, and like so much.
Good reference has been made to the Z-1p and the MZ-S, and one might include the 645N also - all ground breaking cameras in their time with some features that are still ahead of the game.
I have recently acquired a K-3 II, a fantastic camera which I thought would be all I could want for - 645Z apart! Now that Pentax are giving us an insight into this beauty, I am thinking again and I seriously expect that I will end up buying their new FF. (It would be an easier decision had Pentax not dropped the price of the 645Z). In the meantime, the K-3 II will serve me well.
Either way, looks like we are in for a real treat. Well done you Ricoh/Pentax guys, I confidently predict that this ff camera is going to be a real winner for them.....and us!