Both Sony A6400 and Nikon D5200 have 24.0 MP resolution sensors but Sony A6400's sensor is APS-C (23.5 x 15.6 mm ) and Nikon D5200's sensor is APS-C (23.5 x 15.6 mm ).
Since Nikon D5200'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 Sony A6400.
Below you can see the A6400 and D5200 sensor size comparison.
Sony A6400 and Nikon D5200 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
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. Sony A6400 and Nikon D5200 sensors have been tested by DxO and the results show that D5200 has a better overall score of 84, 1 points higher compared to A6400's score of 83.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A6400 |
83 |
24.0 bits |
13.6 Evs |
1431 ISO |
Nikon D5200 |
84 |
24.2 bits |
13.9 Evs |
1284 ISO |