Canon S95 has a
10.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CCD sensor and features Digic 4 processor. On the other hand, Sony A7S has a
12.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor and features Bionz X processor.
Below you can see the S95 and A7S sensor size comparison.
Sensor Size and Resolution Comparison image of Canon S95 and Sony A7S Cameras
As seen above, Sony A7S has a 20.6x Larger sensor area than Canon S95. 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. Canon S95 and Sony A7S sensors have been tested by DxO and the results show that A7S has a better overall score of 87, 40 points higher compared to S95's score of 47.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon S95
47
20.4 bits
11.3 Evs
153 ISO
Sony A7S
87
23.9 bits
13.2 Evs
3702 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
Canon S95
or the
Sony A7S ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/1.7-inch 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.
