mackguyver said:
Eldar, that puts things in perspective as to what you were hoping for and received. Also, I know you're considering MF and don't know if you saw this article, but the DR examples sure make me want to get the Pentax!
https://fstoppers.com/originals/pentax-645z-medium-format-digital-camera-review-41145
Here's an outstanding review on the 645Z authored by CR member wockawocka:
http://chrisgilesphotography.com/blog/pentax-645z-review-pt1-the-journey/
He's such a nice guy that if you send he a few pounds to help pay for his web hosting fees, he'll send you 100 raw files to play around with

After spending a few hours doing just that, I'm now considering selling one of my cars to fund a new Pentax ;D
IMHO, the 645Z is the new gold standard in IQ. Pair it up with a 5D3 or a 1DX, and you have yourself a deadly combination of speed/versatility and ultimate static IQ

Most reviews rave about the DR of the 645Z, and it is stunning, but the standout feature for me is its ability to render fine tonal gradations, particularly in the shadows and highlights. The tonality is so smooth you can't really call them gradients at all.
For severely backlit sunset shots, I often stack two ND grad filters (six stops total), underexpose the foreground by one stop, and fill the subject ( a car

) in with two 1,000ws monolights. After playing around with 100-plus raw files from the 645Z, I figure I can pull this same shot off with no grad filters and a couple of speedlights. Obviously, less time setting up when the good light is rapidly fading = less frustration = more shots fired = more keepers.
I tried my best to traumatize the 645Z's files in post, particularly wockawocka's sunset shots, but was only able to get a wee bit of artifacting only visible when pixel peeping. This thing's a beast, and I hope to own one someday
