Nikon A has a 16.0MP APS-C (23.6 x 15.7 mm ) sized CMOS sensor . You can shoot at maximum resolution of 4928 x 3264 pixels. A has a native ISO range of 100 - 6400 which can be boosted to 25600 and it can save files in RAW format which gives you a wider room for post processing.
Nikon A 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 Nikon A vs Fujifilm X-E5 or take a look at Highest resolution Compact cameras list.
Nikon A DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Nikon A sensor has been tested by DxO Mark and got an overall score of 80 for its image quality. You can find the details of their analysis of Nikon A here.
Let's look at how the size of the Nikon A's APS-C sensor compares with other standard sensor sizes.
Comparison image of Nikon A Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Nikon A gives you at any given aperture.
You can
calculate
the exact depth of field for the Nikon A
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.
