Friday, August 29, 2008

Sigma DP1 Overview

Review by Shawn Barnett

The Sigma DP1 was designed for anyone wanting digital SLR quality in a small package. Starting with the Sigma DP1's sensor, Sigma chose Foveon's 14.1-megapixel sensor that outputs a 4.64-megapixel image. Each of those pixels is created by three photosites that are stacked in layers, recording full color information at every pixel location. The maximum resolution is identical to that of Sigma's SD14 digital SLR: 2640 x 1760 pixels (uninterpolated), with a 3:2 aspect ratio. (Traditional Bayer-sensor cameras capture only one color at each pixel location, and interpolate the other two colors from surrounding pixels, leading to somewhat reduced luminance resolution, and a significant reduction in chrominance resolution and other color-related problems).