Sony A3000 has a 20.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features BIONZ processor. You can shoot at maximum resolution of 5456 x 3632 pixels with aspect ratios of 3:2 and 16:9. A3000 has a native ISO range of 100 - 16000 and it can save files in RAW format which gives you a wider room for post processing.
Sony A3000 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 Sony A3000 vs Fujifilm X-E5 or take a look at Highest resolution Mirrorless cameras list.
Sony A3000 DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Sony A3000 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 Sony A3000 here.
Let's look at how the size of the Sony A3000's APS-C sensor compares with other standard sensor sizes.
Comparison image of Sony A3000 Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Sony A3000 gives you at any given aperture.
You can
calculate
the exact depth of field for the Sony A3000
at any focal length, aperture and subject distance, including the hyperfocal distance
for landscapes and the very shallow focus zone you get with long telephoto lenses.
