Canon G11 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, Canon S120 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized BSI-CMOS sensor and features Digic 6 processor.
Below you can see the G11 and S120 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G11 and Canon S120 Cameras
Canon G11 and Canon S120 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Canon G11 has 20% larger pixel area compared to Canon S120, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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 G11 and Canon S120 sensors have been tested by DxO and the results show that S120 has a better overall score of 56, 9 points higher compared to G11's score of 47.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon G11
47
20.4 bits
11.1 Evs
169 ISO
Canon S120
56
21.3 bits
11.9 Evs
246 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 G11
or the
Canon S120 ,
including hyperfocal distance.
