Both Pentax K-r and Canon 450D have APS-C sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the K-r and 450D sensor size comparison.
As seen above, Pentax K-r has a 1.1x Larger sensor area than Canon 450D. 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
Both Pentax K-r and Canon 450D 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, K-r has scored 72, 11 points higher than 450D.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Pentax K-r |
72 |
22.9 bits |
12.4 Evs |
755 ISO |
Canon 450D |
61 |
21.9 bits |
10.8 Evs |
692 ISO |