Originally posted by Blue Here the difference is $900 dollars. If Pentax hypothetically had that price difference on the K-5 II/s and theoretical ff, $1300 + 900 = $2200.
The difference here between the D800 and the D600 is $608 body-only, adjusted for exchange rates. If you buy a lens for either which is better than the basic kit lens, say a 24-120mm, the difference between the two body+lens is around 15 per cent. So if you can afford one you can afford the other most likely and you don't have to worry much whether you rate the D600 or not. Of course, if you do buy the D800 you will then have to go on buying high-end lenses for it or the results will be iffy (and probably a new computer too) but, wow, one can see how a broad range of cleverly priced cameras enables a company to game buyers up and down the scales effortlessly. Whether those buyers will bite isn't yet clear, of course,
More worrying for makers of high-end APS-C is that since launch here the D600 body-only has come down to 1659 GBP, or $2656. That isn't really above but actually in the price limits of high-end APS-C only 2-3 years ago and we are still in early days. Even if that price turns out to be loss-leading and predatory, and in reality Nikon are losing money on body-only sales (I've no idea), I'd say it is still a worry. If a new Pentax APS-C launches here for anything more than 1000 GBP (the price of the new K5IIs is 949 GBP) then once you start adding body+lens (Pentax lenses here being very highly priced), a buyer who can afford that kind of money would be nuts not to go for FF unless there are other considerations in mind.
An example:
K5IIs + DA*16-50mm = 1748 GBP
D600 + 24-85mm VR = 2079 GBP
That's a difference of about 18 per cent extra to jump not only to a larger format but to an entirely new generation of camera. For Pentax, with nothing in the locker for another year or two years while they are "studying" the market, apparently, such figures must be terrifying. Even if you wind down the quality by going for a vanilla K5II and a more lowly Pentax lens the figures are still pretty chilling, since the IQ gap has just widened for not a lot of saved money.
**Edited: My original comparison mistakenly had the Nikon 16-85mm DX at 30 GPB less. I've changed it above to the FX lens I orginally intended.