Sony A100 has a
10.0MP APS-C (23.6 x 15.8 mm ) sized CCD sensor . On the other hand, Sony A7S II has a
12.0MP Full frame (35.6 x 23.8 mm ) sized CMOS sensor and features Bionz X processor.
Below you can see the A100 and A7S II sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A100 and Sony A7S II Cameras
As seen above, Sony A7S II has a 2.3x Larger sensor area than Sony A100. 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 A100 and Sony A7S II sensors have been tested by DxO and the results show that A7S II has a better overall score of 85, 24 points higher compared to A100's score of 61.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A100
61
22.0 bits
11.2 Evs
476 ISO
Sony A7S II
85
23.6 bits
13.3 Evs
2993 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 A100
or the
Sony A7S II ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-C versus Full frame),
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.
