Sony A700 has a
12.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor . 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 A700 and GX-20 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A700 and Samsung GX-20 Cameras
Sony A700 and Samsung GX-20 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. Sony A700 and Samsung GX-20 sensors have been tested by DxO and the results show that GX-20 has a better overall score of 68, 2 points higher compared to A700's score of 66.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A700
66
22.3 bits
11.9 Evs
581 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
Sony A700
or the
Samsung GX-20 ,
including hyperfocal distance.
