Both Samsung NX300 and Canon G3 X have 20.0 MP resolution sensors but Samsung NX300's sensor is APS-C (23.5 x 15.7 mm ) and Canon G3 X's sensor is 1″ (13.2 x 8.8 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 Canon G3 X.
Below you can see the NX300 and G3 X sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung NX300 and Canon G3 X Cameras
As seen above, Samsung NX300 has a 3.2x Larger sensor area than Canon G3 X. 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
Both Samsung NX300 and Canon G3 X 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, NX300 has scored 76, 13 points higher than G3 X.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Samsung NX300
76
23.6 bits
12.7 Evs
942 ISO
Canon G3 X
63
21.4 bits
12.3 Evs
521 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 NX300
or the
Canon G3 X ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-C versus 1″ ),
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.
