Canon G12 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 S100 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CMOS sensor and features Digic 5 processor.
Below you can see the G12 and S100 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G12 and Canon S100 Cameras
Canon G12 and Canon S100 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 G12 has 20% larger pixel area compared to Canon S100, 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 G12 and Canon S100 sensors have been tested by DxO and the results show that S100 has a better overall score of 50, 3 points higher compared to G12's score of 47.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon G12
47
20.4 bits
11.2 Evs
161 ISO
Canon S100
50
20.7 bits
11.6 Evs
153 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 G12
or the
Canon S100 ,
including hyperfocal distance.
