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.
For more more details on how to interpret our test data, check out our full explanation of our noise and dynamic range tests.
Here we compare the Nikon D3300 with the...
JPEG signal to noise ratio
Taking the graph at face value makes it appear as if the D3300 is the worst performer here. While it is true that other cameras in this test, including the camera's predecessor, have a better signal to noise ratio, this is an indication that the camera is favouring detail resolution over noise suppression. This means that while images may be noisier in some conditions, you'll have better detail reproduction.
Raw signal to noise ratio
It's a similar story here, with the Nikon D3300 putting in the worst performance on the graph. You can tweak noise reduction in post-production when shooting in raw format, which may be of benefit if you find that the JPEGs are too noisy for your liking.
JPEG dynamic range
As we would probably expect, the D3300 performs pretty similarly to the D3200 for dynamic range. It puts in a good, consistent, performance across the sensitivity range, beating the Canon EOS 100D at the lower end of the scale, before dropping below it from ISO 1600 and above.
Raw dynamic range
In terms of raw format files (after conversion to TIFF), the D3300 puts in a reasonably similar performance to the other cameras in the test here. It is fairly closely matched to the Fuji X-A1, while it is almost identical to the Canon EOS 100D at the very bottom end of the sensitivity run, dipping below it from ISO 800 and above.