Sigma has been churning out a number of iconic, unusual lens designs from a 300-600mm f/4 to a 135mm f/1.4 to a 17-40mm f/1.8 zoom. But behind the scenes, Sigma’s engineers are working on another unusual project – a sensor with separate color layers called a Foveon.
When Sigma first entered the digital camera market in 2002, it did so with an unusual sensor called the Foveon, a three-layer sensor that separated each color into its own layer. This design is said to retain better color accuracy and improve dynamic range over traditional CMOS sensors with a Bayer color array.
