I have a Sigma DP2 and a GR3 took photos with the Dp2 at night and had a terrible time trying to focus.The Sigma DP-2 Digital Point&Shoot Camera features a 14 Mega Pixel FOVEON X3 direct image sensor (2,652 x 1,768 x 3 layers). The size of the image sensor used in the DP2 cameras is 20.7mm x 13.8mm. It is approximately seven to twelve times larger than the 1/1.8 inch to 1/2.5 inch image sensors used in ordinary compact digital cameras. The pixel size of the image sensor is 7.8m. The large photodiodes deployed at a large pixel pitch capture pure, rich light efficiently and give the DP1 its high resolution and richly-graduated tones. The DP2 incorporates "TRUE II" which is an improved version of "TRUE" (Three-layer Responsive Ultimate Engine), the world's first image processing engine suited for the three silicon embedded layer direct image sensor.
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Sigma DP2
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Sigma DP2