Both Samsung NX210 and Panasonic GH5 II have 20.0 MP resolution sensors but Samsung NX210's sensor is APS-C (23.5 x 15.7 mm ) and Panasonic GH5 II's sensor is Four Thirds (17.3 x 13 mm ).
Since Samsung NX210's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Panasonic GH5 II.
One other difference between these two cameras that is worth mentioning is that Panasonic GH5 II'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 NX210 and GH5 II sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung NX210 and Panasonic GH5 II Cameras
As seen above, Samsung NX210 has a 1.6x Larger sensor area than Panasonic GH5 II. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in 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. Samsung NX210 and Panasonic GH5 II sensors have been tested by DxO and the results show that GH5 II has a better overall score of 79, 8 points higher compared to NX210's score of 71.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Samsung NX210
71
22.8 bits
12.5 Evs
719 ISO
Panasonic GH5 II
79
23.7 bits
13.1 Evs
1136 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
Samsung NX210
or the
Panasonic GH5 II ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-C versus Four Thirds),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
