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We ran the DxO One through our usual battery of lab tests, including resolution, dynamic range and signal to noise ratio (noise). We also compared it with four of its chief rivals, which is a little tricky with such an unusual camera – though we have found some interesting alternatives:
Sony RX100 IV: A classic high-end compact camera and a more mainstream choice for photographers who want a carry-anywhere camera. Interestingly, this too has a 20-megapixel 1-inch sensor.
Canon PowerShot G7 X: Canon also uses a 1-inch 20-megapixel CMOS sensor it its smallest PowerShot model.
Panasonic CM1: The DxO One's claim to fame is that it lets you shoot with a big 20-megapixel 1-inch sensor and your iPhone – but the Panasonic CM1 is a phone with the same sensor specs built in.
DxO One resolution charts
JPEG resolution analysis: Disappointingly, the DxO One's JPEG images deliver a little less resolution than those from its rivals. It looks as if you need to shoot raw files to get the sharpest detail – see the chart below.
Raw (converted to TIFF) resolution analysis: When shooting raw files the DxO one delivers results on a par with those from the Sony RX100 IV, Canon G7 X and Panasonic CM1.
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