Olympus E-620 has a
12.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic III+ processor. On the other hand, Olympus E-M10 II has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic VII processor.
Below you can see the E-620 and E-M10 II sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus E-620 and Olympus E-M10 II Cameras
Olympus E-620 and Olympus E-M10 II 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. On the other hand, since Olympus E-620 has 30% larger pixel area compared to Olympus E-M10 II, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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. Olympus E-620 and Olympus E-M10 II sensors have been tested by DxO and the results show that E-M10 II has a better overall score of 73, 18 points higher compared to E-620's score of 55.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Olympus E-620
55
21.3 bits
10.3 Evs
536 ISO
Olympus E-M10 II
73
23.1 bits
12.5 Evs
842 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
Olympus E-620
or the
Olympus E-M10 II ,
including hyperfocal distance.
