Both Pentax K-m and Pentax K200D have 10.0 MP resolution sensors but Pentax K-m's sensor is APS-C (23.5 x 15.7 mm ) and Pentax K200D's sensor is APS-C (23.5 x 15.7 mm ).
Since Pentax K200D's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Pentax K-m.
Below you can see the K-m and K200D sensor size comparison.
Pentax K-m and Pentax K200D 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.
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-m |
64 |
22.4 bits |
11.4 Evs |
513 ISO |
Pentax K200D |
64 |
22.4 bits |
11.4 Evs |
561 ISO |