Both Nikon A and Ricoh GR have APS-C sized 16.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the A and GR sensor size comparison.
Nikon A and Ricoh GR have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
Both Nikon A and Ricoh GR 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, A has scored 80, 2 points higher than GR.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon A |
80 |
23.4 bits |
13.8 Evs |
1164 ISO |
Ricoh GR |
78 |
23.6 bits |
13.5 Evs |
972 ISO |