Ricoh GR has a 16.0MP APS-C (23.7 x 15.7 mm ) sized CMOS sensor . You can shoot at maximum resolution of 4928 x 3264 pixels with aspect ratios of 1:1, 4:3 and 3:2. GR has a native ISO range of 100 - 25600 and it can save files in RAW format which gives you a wider room for post processing.
Ricoh GR is not the highest resolution APS-C camera. Fujifilm X-E5 with its 40.0MP sensor is leading in this class. Check the comparison of Ricoh GR vs Fujifilm X-E5 or take a look at Highest resolution Compact cameras list.
Ricoh GR DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Ricoh GR sensor has been tested by DxO Mark and got an overall score of 78 for its image quality. You can find the details of their analysis of Ricoh GR here.
Let's look at how the size of the Ricoh GR's APS-C sensor compares with other standard sensor sizes.
Comparison image of Ricoh GR Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Ricoh GR gives you at any given aperture.
You can
calculate
the exact depth of field for the Ricoh GR
at any focal length, aperture and subject distance, including the hyperfocal distance
for landscapes and how close you can get before the focus zone becomes too thin.
