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.
JPEG signal to noise ratio
In terms of signal to noise ratio, the HX400 again puts in a good consistent performance, especially at low to mid-range sensitivities. It is the Canon PowerShot SX50 again which beats the HX400 at almost every sensitivity, dipping just below it at the very top end of the sensitivity run.
JPEG dynamic range
Here we can see that the HX400 puts in a very consistent performance throughout the sensitivity range, but it's not a match for the Canon PowerShot SX50, which scores better than it at every sensitivity. It is also beaten by the Panasonic FZ72 throughout most of the range. The Fuji HS50 puts in a worse performance, but that could be a reflection of Fuji's tendency towards warmer tones.