Canon 650D has a
18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 5 processor. On the other hand, Canon 500D has a
15.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 4 processor.
Below you can see the 650D and 500D sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 650D and Canon 500D Cameras
Canon 650D and Canon 500D 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 500D has 19% larger pixel area (22.08µm 2 vs 18.54µm 2 ) compared to Canon 650D, it has larger pixel area to collect light hence potential to 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 650D and Canon 500D sensors have been tested by DxO and the results show that 500D has a better overall score of 63, 1 points higher compared to 650D's score of 62.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon 650D
62
21.7 bits
11.2 Evs
722 ISO
Canon 500D
63
21.7 bits
11.5 Evs
663 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 650D
or the
Canon 500D ,
including hyperfocal distance.
