Sony RX100 II has a
20.0MP 1-inch (13.2 x 8.8 mm ) sized BSI-CMOS sensor . On the other hand, Olympus 5010 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features TruePic III processor.
Sony RX100 II's sensor provides 6MP more than Olympus 5010's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the RX100 II and 5010 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony RX100 II and Olympus 5010 Cameras
As seen above, Sony RX100 II has a 4.2x Larger sensor area than Olympus 5010. 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.
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
Sony RX100 II
or the
Olympus 5010 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1-inch versus 1/2.3-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.