Both Canon R8 and Nikon Z6 have Full frame sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the R8 and Z6 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon R8 and Nikon Z6 Cameras
Canon R8 and Nikon Z6 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It 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. Canon R8 and Nikon Z6 sensors have been tested by DxO and the results show that Z6 has a better overall score of 95, 2 points higher compared to R8's score of 93.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon R8
93
24.5 bits
14.5 Evs
3295 ISO
Nikon Z6
95
25.3 bits
14.3 Evs
3299 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
Canon R8
or the
Nikon Z6 ,
including hyperfocal distance.
