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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.
Signal to noise ratio
These results show that images from the Sony Cyber-Shot W690 at lower ISO sensitivities show the same sort of signal to noise ratio as those from the Samsung PL210, Nikon Coolpix S6200 and Canon A4000. At mid-range sensitivities (between ISO 100 and ISO 400), the Sony camera performs better than all but the Nikon, before dipping at higher ISOs to the Samsung's level.
The Sony Cyber-Shot W690's images perform better in terms of dynamic range than the Samsung PL210 and Nikon Coolpix S6200, but sit below results from the Canon A4000, throughout most sensitivity settings. However, at ISO 1600 the Samsung just peaks above the Sony, before returning to a similar score at the next setting up, ISO 3200.
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Amy has been writing about cameras, photography and associated tech since 2009. Amy was once part of the photography testing team for Future Publishing working across TechRadar, Digital Camera, PhotoPlus, N Photo and Photography Week. For her photography, she has won awards and has been exhibited. She often partakes in unusual projects - including one intense year where she used a different camera every single day. Amy is currently the Features Editor at Amateur Photographer magazine, and in her increasingly little spare time works across a number of high-profile publications including Wired, Stuff, Digital Camera World, Expert Reviews, and just a little off-tangent, PetsRadar.