Originally posted by MetaD Aside from Sony, FF DSLRs are not so far off the 645D price bracket given that the 645D doubles your resolution.
Just some corrections on this remark: The 645D does
not double your resolution compared to
any FF dSLR; it takes
four times the pixels to double resolution, not two times the pixels. It would take
48.4 megapixels to double the resolution of the Nikon D700, for example, and
98.4 megapixels to double the resolution of the Sony A900 or A850. Further, this assumes in every case that the lenses can provide that kind of lofty resolution, which they may well fail to do. The Nikon D700, Sony A900, Sony A850 and Canon 5D Mk II are
all priced below $3,000, less than 1/3 the price, and the Nikon D3S is just a bit more than 1/2 the price, so the 645D is in the clouds price-wise against anything but the Nikon D3X and the Canon 1DS Mk III, as respects FF dSLRs. Even as respects those two, the current prices are nearly $2,000 and $3,285 less, respectively.
On a general note, the idea that the 645D somehow "leapfrogs" FF dSLRs or makes them "irrelevant" is ludicrous. Medium format cameras appeal to a much smaller and much more specialized market, and offer far more limiting tools (i.e., lenses) and operating ranges (i.e., ISOs, frame rates) compared to 35mm format. They are completely different tools, but 35mm format is far more versatile. Pentax
still needs to get off its rump and make a FF dSLR.