Japanís Sigma Corp. has today taken the covers off its flagship Sigma SD1 15.4 megapixel DSLR at Photokina. It adopts a lightweight, weather-proof, solid magnesium alloy body to house its 1.5X crop Foveon X3 sensor. The technology enables the camera to capture all primary RGB colors at each pixel location rather than use a Bayer filter and leads Sigma to make a questionable claim to a 46-megapixel sensor.
