Canon G15 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CMOS sensor and features Digic 5 processor. On the other hand, Canon G11 has a
10.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CCD sensor and features Digic 4 processor.
Below you can see the G15 and G11 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G15 and Canon G11 Cameras
Canon G15 and Canon G11 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 (4.16µm 2 vs 3.46µm 2 ) compared to Canon G15, it has larger pixel area to collect light hence potential to 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 G15 and Canon G11 sensors have been tested by DxO and the results show that G11 has a better overall score of 47, 1 points higher compared to G15's score of 46.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon G15
46
19.9 bits
11.5 Evs
165 ISO
Canon G11
47
20.4 bits
11.1 Evs
169 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 G15
or the
Canon G11 ,
including hyperfocal distance.
