Both Sony RX100 VII and Samsung NX300 have 20.0 MP resolution sensors but Sony RX100 VII's sensor is 1″ (13.2 x 8.8 mm ) and Samsung NX300's sensor is APS-C (23.5 x 15.7 mm ).
Since Samsung NX300'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 Sony RX100 VII.
Below you can see the RX100 VII and NX300 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony RX100 VII and Samsung NX300 Cameras
As seen above, Samsung NX300 has a 3.2x Larger sensor area than Sony RX100 VII. 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. Sony RX100 VII and Samsung NX300 sensors have been tested by DxO and the results show that NX300 has a better overall score of 76, 13 points higher compared to RX100 VII's score of 63.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony RX100 VII
63
21.8 bits
12.4 Evs
418 ISO
Samsung NX300
76
23.6 bits
12.7 Evs
942 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
Sony RX100 VII
or the
Samsung NX300 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1″ versus APS-C),
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.
