We shoot a specially designed chart in carefully controlled conditions and the resulting images are analysed using DXO Analyzer software to generate the data to produce the graphs below.
A high signal to noise ratio (SNR) indicates a cleaner and better quality image.
JPEG signal to noise ratio
In terms of JPEG files, the Sony a3000 doesn't fare particularly well when compared with other similar cameras, including its own Sony NEX-3N. It also doesn't perform as well as the Panasonic GF6, throughout the entire sensitivity range.
Raw (converted to TIFF) signal to noise ratio
For the raw format files, the A3000 compares more closely with the GF6 and the NX2000, but it is beaten by some margin by its own NEX-3N.
JPEG dynamic range
For dynamic range, the a3000 competes very closely with the other cameras on test, beating the others at the lower end of the scale. From the mid-range on, other cameras overtake it slightly, though.
Raw (converted to TIFF) dynamic range
The A3000 sits in the middle for raw format dynamic range. It beats the GF6 at every sensitivity, but it is beaten by the NEX-3N and Samsung NX2000 at almost every other sensitivity. It's a pretty consistent performance though.