Both Canon S95 and Canon S90 have 1/1.7-inch sized 10.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the S95 and S90 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon S95 and Canon S90 Cameras
Canon S95 and Canon S90 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.
DxOMark Sensor Scores
Both Canon S95 and Canon S90 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, S95 has scored 47, 1 points higher than S90.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon S95
47
20.4 bits
11.3 Evs
153 ISO
Canon S90
46
20.2 bits
11.0 Evs
185 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 S95
or the
Canon S90 ,
including hyperfocal distance.
