Both Canon T7 and Sony A68 have APS-C sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the T7 and A68 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon T7 and Sony A68 Cameras
As seen above, Sony A68 has a 1.1x Larger sensor area than Canon T7. 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. Canon T7 and Sony A68 sensors have been tested by DxO and the results show that A68 has a better overall score of 79, 8 points higher compared to T7's score of 71.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon T7
71
22.6 bits
11.9 Evs
1009 ISO
Sony A68
79
24.1 bits
13.5 Evs
701 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 T7
or the
Sony A68 ,
including hyperfocal distance.
