Olympus E-3 has a
10.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic III processor. On the other hand, Olympus E-620 has a
12.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic III+ processor.
Below you can see the E-3 and E-620 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus E-3 and Olympus E-620 Cameras
Olympus E-3 and Olympus E-620 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-3 has 22% larger pixel area compared to Olympus E-620, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Olympus E-3 and Olympus E-620 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, E-3 has scored 56, 1 points higher than E-620.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Olympus E-3
56
21.6 bits
10.5 Evs
571 ISO
Olympus E-620
55
21.3 bits
10.3 Evs
536 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-3
or the
Olympus E-620 ,
including hyperfocal distance.
