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, Nikon P7700 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CMOS sensor .
Below you can see the G12 and P7700 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G12 and Nikon P7700 Cameras
Canon G12 and Nikon P7700 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 Nikon P7700, 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 Nikon P7700 sensors have been tested by DxO and the results show that P7700 has a better overall score of 53, 6 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
Nikon P7700
53
21.1 bits
11.7 Evs
191 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
Nikon P7700 ,
including hyperfocal distance.
