The sigma dp2 quattro digital camera presents a portable and powerful compact camera for the advanced shooter looking to capture exceptional images the dp2 sits in the middle of the sigma quattro series with a fixed 30mm f28 lens and newly designed 39 megapixel aps c sized foveon x3 quattro sensor the foveon image sensor is sigmas proprietary technology which captures transmitted light in a vertical 3 layer sensor with dedicated layers to red green and blue the only one of its kind this u