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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.
Our analysis shows quite a difference between the cameras, with the Olympus SP-620UZ producing good overall signal to noise ratio results that just beat the competition up to a sensitivity of ISO 400. Dynamic range results show that it lags behind the Canon PowerShot SX150 IS, Panasonic FZ150 and Sony Cyber-shot HX100V at all sensitivities.
Our results from the Olympus SP-620UZ indicate that it handles noise well at the lower end of the sensitivity scale just having the edge over the Sony Cyber-shot HX100V up to ISO 400. From ISO 400 the Panasonic FZ150 takes the lead.
This chart indicates that the Olympus SP-620UZ's JPEGs have a lower dynamic range across the sensitivity scale than either the Canon PowerShot SX150 IS, Panasonic FZ150 and the Sony Cyber-shot HX100V.
When not wrestling wild bears or leaping tall buildings in a single bound, Gavin Stoker can be found editing British Photographic Industry News, the UK's longest running and only photo trade title. He has over 25 years of camera testing and reviewing under his belt.