Canon G1 X has a
14.0MP 1.5-inch (18.7 x 14 mm ) sized CMOS sensor and features Digic 5 processor. On the other hand, Canon G15 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 G1 X and G15 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G1 X and Canon G15 Cameras
As seen above, Canon G1 X has a 6.3x Larger sensor area than Canon G15. 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
Both Canon G1 X and Canon G15 sensors have been tested by DxoMark. DxoMark 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. Of the two cameras that we are comparing, G1 X has scored 60, 14 points higher than G15.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon G1 X
60
21.7 bits
10.8 Evs
644 ISO
Canon G15
46
19.9 bits
11.5 Evs
165 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 G1 X
or the
Canon G15 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1.5-inch versus 1/1.7-inch),
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.
