Both Nikon D7200 and Pentax K-3 have 24.0 MP resolution sensors but Nikon D7200's sensor is APS-C (23.5 x 15.6 mm ) and Pentax K-3's sensor is APS-C (23.5 x 15.6 mm ).
Since Pentax K-3'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 Nikon D7200.
Another similarity between these two cameras is that both Pentax K-3 and Nikon D7200 sensors lack anti-alias (Low-Pass) filters. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the D7200 and K-3 sensor size comparison.
Nikon D7200 and Pentax K-3 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
Both Nikon D7200 and Pentax K-3 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, D7200 has scored 87, 7 points higher than K-3.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D7200 |
87 |
24.5 bits |
14.6 Evs |
1333 ISO |
Pentax K-3 |
80 |
23.7 bits |
13.4 Evs |
1216 ISO |