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, Canon SL2 has a
24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 7 processor.
Canon SL2's sensor provides 10MP more than Sony A33'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 A33 and SL2 sensor size comparison.
As seen above, Sony A33 has a 1.1x Larger sensor area than Canon SL2. 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
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. Sony A33 and Canon SL2 sensors have been tested by DxO and the results show that SL2 has a better overall score of 79, 9 points higher compared to A33's score of 70.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A33 |
70 |
22.8 bits |
12.6 Evs |
591 ISO |
Canon SL2 |
79 |
23.6 bits |
13.4 Evs |
1041 ISO |