Canon SL2 has a
24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 7 processor. On the other hand, Canon 100D has a
18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 5 processor.
Canon SL2's sensor provides 6MP more than Canon 100D'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 SL2 and 100D sensor size comparison.
Sensor Size and Resolution Comparison image of Canon SL2 and Canon 100D Cameras
Canon SL2 and Canon 100D 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 Canon 100D has 33% larger pixel area (18.54µm2 vs 13.84µm2) compared to Canon SL2, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Canon SL2 and Canon 100D 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, SL2 has scored 79, 16 points higher than 100D.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon SL2 |
79 |
23.6 bits |
13.4 Evs |
1041 ISO |
Canon 100D |
63 |
21.8 bits |
11.3 Evs |
843 ISO |