Medium well done: Two takes on the Pentax 645Z

The Pentax 645Z is a highly sought-after camera, offering 50MP resolution from its medium-format CMOS sensor, and a range of features closer to those of a 35mm DSLR than a traditional digital MF camera. We've been working with the 645Z for a little while, running it though our studio tests to see what it's capable of. As part of this process we handed the camera off to David Wentworth, a local Seattle studio photographer, for his opinion. Our very own Sam Spencer - DPReview studio manager - pro...