Both Leica D-LUX 4 and Canon G11 have 10.0 MP resolution sensors but Leica D-LUX 4's sensor is 1/1.63-inch (8.07 x 5.56 mm ) and Canon G11's sensor is 1/1.7-inch (7.44 x 5.58 mm ).
Since Leica D-LUX 4'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 D-LUX 4 and G11 sensor size comparison.
Sensor Size and Resolution Comparison image of Leica D-LUX 4 and Canon G11 Cameras
Leica D-LUX 4 and Canon G11 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
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. Leica D-LUX 4 and Canon G11 sensors have been tested by DxO and the results show that G11 has a better overall score of 47, 8 points higher compared to D-LUX 4's score of 39.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Leica D-LUX 4
39
19.6 bits
10.8 Evs
94 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
Leica D-LUX 4
or the
Canon G11 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/1.63-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.
