Camera and lens maker Sigma has bought Foveon, the sensor technology company that develops the sensors it uses. Foveon's technology uses three photosensitive layers to detect red, green and blue light at each pixel.

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At one of the largest and most influential trade shows for photography, Photo Marketing Association 2008, Sigma Corporation announced the DP1, a highly-anticipated compact camera with a sensor the size and resolution used typically in a single-lens-reflex camera.

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CNET wants your opinion on alternatives to Canon and Nikon.

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