Canon M3 has a
24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 6 processor. On the other hand, Sony NEX-5T has a
16.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor and features Bionz processor.
Canon M3's sensor provides 8MP more than Sony NEX-5T'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 M3 and NEX-5T sensor size comparison.
Sensor Size and Resolution Comparison image of Canon M3 and Sony NEX-5T Cameras
Canon M3 and Sony NEX-5T have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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. Canon M3 and Sony NEX-5T sensors have been tested by DxO and the results show that NEX-5T has a better overall score of 78, 6 points higher compared to M3's score of 72.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon M3
72
22.8 bits
11.8 Evs
1169 ISO
Sony NEX-5T
78
23.6 bits
13.0 Evs
1015 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
Canon M3
or the
Sony NEX-5T ,
including hyperfocal distance.