Both Canon G11 and Panasonic LX5 have 10.0 MP resolution sensors but Canon G11's sensor is 1/1.7-inch (7.44 x 5.58 mm ) and Panasonic LX5's sensor is 1/1.63-inch (8.07 x 5.56 mm ).
Since Panasonic LX5's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Canon G11.
Below you can see the G11 and LX5 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G11 and Panasonic LX5 Cameras
Canon G11 and Panasonic LX5 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
Both Canon G11 and Panasonic LX5 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, G11 has scored 47, 6 points higher than LX5.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon G11
47
20.4 bits
11.1 Evs
169 ISO
Panasonic LX5
41
19.6 bits
10.8 Evs
132 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
Panasonic LX5 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/1.7-inch versus 1/1.63-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.
