Panasonic GX7 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine processor. On the other hand, Samsung GX-20 has a
15.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor .
Below you can see the GX7 and GX-20 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic GX7 and Samsung GX-20 Cameras
As seen above, Samsung GX-20 has a 1.6x Larger sensor area than Panasonic GX7. 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 Panasonic GX7 and Samsung GX-20 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, GX7 has scored 70, 2 points higher than GX-20.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Panasonic GX7
70
22.6 bits
12.2 Evs
718 ISO
Samsung GX-20
68
23.1 bits
11.2 Evs
714 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
Panasonic GX7
or the
Samsung GX-20 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(Four Thirds 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.
