Canon T6 has a
18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 4+ processor. On the other hand, Canon 750D has a
24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 6 processor.
Canon 750D's sensor provides 6MP more than Canon T6'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 T6 and 750D sensor size comparison.
Sensor Size and Resolution Comparison image of Canon T6 and Canon 750D Cameras
Canon T6 and Canon 750D 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 T6 has 33% larger pixel area compared to Canon 750D, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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 T6 and Canon 750D sensors have been tested by DxO and the results show that 750D has a better overall score of 71, 5 points higher compared to T6's score of 66.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon T6
66
22.0 bits
11.7 Evs
781 ISO
Canon 750D
71
22.7 bits
12.0 Evs
919 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 T6
or the
Canon 750D ,
including hyperfocal distance.