Panasonic GH1 has a
12.0MP Four Thirds (18.89 x 14.48 mm ) sized CMOS sensor and features Venus Engine HD processor. On the other hand, Olympus E-PL9 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic VIII processor.
Below you can see the GH1 and E-PL9 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic GH1 and Olympus E-PL9 Cameras
As seen above, Panasonic GH1 has a 1.2x Larger sensor area than Olympus E-PL9. 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
Panasonic GH1
or the
Olympus E-PL9 ,
including hyperfocal distance.
