Pentax 645z Image Quality
Get Pentax 645z and Pentax 645 lens at B&H Photo.
Image quality of the 645Z + Pentax 90mm f/2.8 is sensational.
I shot a controlled scene today with the 645Z and also the Nikon D800E and Sigma dp2 Quattro and Sony A7R and Leica M Typ 240, and I was very impressed with just how good the 645Z looked compared to all of them.
Unless the new Nikon D810 has some tricks up its sleeve in per-pixel quality (it might), it looks like the 645Z is a great choice for someone looking for high grade images that clearly go beyond what is possible from a 36 X 24mm full-frame camera. Image quality has multiple dimensions, and I speak not of resolution so much (though the 645Z delivers there), but of total image quality.