Both Hasselblad X1D II 50C and Pentax 645Z have Medium format sized 51.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
One other difference between these two cameras that is worth mentioning is that Pentax 645Z's sensor doesn't have an anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the X1D II 50C and 645Z sensor size comparison.
Hasselblad X1D II 50C and Pentax 645Z have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.
DxOMark Sensor Scores
Both Hasselblad X1D II 50C and Pentax 645Z sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, X1D II 50C has scored 102, 1 points higher than 645Z.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Hasselblad X1D II 50C |
102 |
26.2 bits |
14.8 Evs |
4489 ISO |
Pentax 645Z |
101 |
26.0 bits |
14.7 Evs |
4505 ISO |