Both Nikon Z7 II and Nikon Z9 have Full frame sized 46.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Another difference between these two cameras is that Nikon Z7 II's sensor lacks 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 Z7 Mark II and Z9 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon Z7 II and Nikon Z9 Cameras
Nikon Z7 II and Nikon Z9 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 Nikon Z7 II and Nikon Z9 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, Z7 Mark II has scored 100, 2 points higher than Z9.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon Z7 II
100
26.3 bits
14.7 Evs
2841 ISO
Nikon Z9
98
26.3 bits
14.4 Evs
2451 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Nikon Z7 II
or the
Nikon Z9 ,
including hyperfocal distance.
