Sony A33 has a
14.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Panasonic G3 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine FHD processor.
Below you can see the A33 and G3 sensor size comparison.
As seen above, Sony A33 has a 1.6x Larger sensor area than Panasonic G3. 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.
DxOMark Sensor Scores
Both Sony A33 and Panasonic G3 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, A33 has scored 70, 14 points higher than G3.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A33 |
70 |
22.8 bits |
12.6 Evs |
591 ISO |
Panasonic G3 |
56 |
21.0 bits |
10.6 Evs |
667 ISO |