Pentax K-7 has a
15.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor and features Prime II processor. On the other hand, Canon 450D has a
12.0MP APS-C (22.2 x 14.8 mm ) sized CMOS sensor .
Below you can see the K-7 and 450D sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax K-7 and Canon 450D Cameras
As seen above, Pentax K-7 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
At Camera Decision, we also look at Dxo Mark sensors when available as we think it is a good indicator of image quality.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Pentax K-7
61
22.6 bits
10.6 Evs
536 ISO
Canon 450D
61
21.9 bits
10.8 Evs
692 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
Pentax K-7
or the
Canon 450D ,
including hyperfocal distance.
