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
This chart shows that JPEG files from the Pentax MX-1 have a weaker signal to noise ratio than those from the Canon PowerShot S110 and Panasonic LX7 at every sensitivity setting, but are stronger than the Olympus XZ-2 at settings up to ISO 3200, after which it falls slightly behind.
Raw signal to noise ratio
Here, the Pentax MX-1's TIFF images (after conversion from raw) again show a weaker signal to noise ratio than those from the Canon PowerShot S110 at every sensitivity. This time though, they are stronger than the Panasonic LX7's images. The Pentax's TIFFs show greater signal to noise ratio than the Olympus XZ-2's at ISO 100-200, but at higher sensitivities they are outdone by the Olympus's.
JPEG dynamic range
JPEG results for dynamic range are much less spread out than those for signal to noise ratio, with the Pentax MX-1's JPEGs starting out showing a greater range than those from the Canon PowerShot S110 and Panasonic LX7 and a smaller range than those from the Olympus XZ-2. However, after ISO 800 the Pentax and Olympus's images drop off, falling behind the Canon and Panasonic for the rest of the range, producing similar results to one another.
Raw dynamic range
Finally, this chart indicates that TIFF images (after conversion from raw) from the Pentax MX-1 again by showing a slightly smaller dynamic range than those from the Olympus XZ-2, while showing a slightly greater range than those from the Canon PowerShot S110, and a significantly stronger range than those from the Panasonic LX7. Results drop off suddenly at ISO 800, falling behind the Olympus and Canon, before peaking again at ISO 1600 to produce to strongest range of the group. The Pentax results bounce up and down again at the higher settings, alternating between first and second place, and always staying well ahead of the Panasonic.