If you look at my previous post on the Sony RX1R II DxOMark test score, you will notice that the Pentax 645z medium format camera is on the top of the list with a score of 101:
Here is a quote from DxOMark:
The new RX1R II achieved an excellent DxOMark score of 97 points, with individual scores of 25.8 bits for color sensitivity, a wide 13.9 EVs dynamic range at base ISO (albeit slightly lower at base than the best tested), and a very good low-light ISO score of 3204 ISO. In terms of rankings, only the Pentax 645Z with its physically larger 43.8 x 32.8mm CMOS sensor (nearly 1.7x the surface area of a full-frame 35mm sensor) is ahead by just over a half-stop in noise levels.
Via Pentaxrumors
