Sigma DP1s features a 14 MP APS-C sized (2652×1768×3 layers) FOVEON X3 direct image sensor, which is penetrated to different depths by different wavelengths of light, this direct image sensor succeeds in full-color capture with the full RGB in a single-pixel location. Just like film, each photodiode captures all the RGB data, so no final-stage demosaicing is required.
The DP1s is equipped with a 16.6mm (35mm equivalent focal length is 28mm) F/4 lens, the large-diameter of aspherical glass provides low distortion and high contrast images. It also offers superior peripheral brightness. The super multi-layer coating reduces flare and ghosting. It allows photographers to take pictures in difficult light conditions.