Andy Westlake tries out an unusual compact camera with a fixed ultra-wideangle lens in his Sigma dp0 Quattro review.
Sigma dp0 Quattro review
Sigma dp0 Quattro review – Noise
At low ISO sensitivities the dp0 gives exceptionally clean, detailed images. But things start to go wrong at higher settings, and JPEGs are practically unusable at ISOs of 1,600 and above. Raw images aren’t so bad, but they show exceptionally high luminance noise. ISO 6,400 is very poor indeed, with visible banding and colour blotching.

RAW ISO 100

RAW ISO 400

RAW ISO 800

RAW ISO 1,600

RAW ISO 3,200

RAW ISO 6,400
Foveon Quattro sensorSigma dp0 Quattro review - Build and handlingSigma dp0 Quattro review - Viewfinder and screenSigma dp0 Quattro review - AutofocusSigma dp0 Quattro review - PerformanceSigma dp0 Quattro review - Resolution and dynamic rangeSigma dp0 Quattro review - NoiseSigma dp0 Quattro review - Our verdict