The Sigma SD1 was a 15-megapixel DSLR from launched in 2010. It uses a 15.3MP x 3 Foveon X3 sensor; and so in some instances, it is marketed as a 46MP camera. Till today, the SD1 has remained the flagship camera from Sigma.
Sigma’s new CEO Kazuto Yamaki has just announced that starting from next month, the SD1 will be renamed as SD1 Merrill, in honor of Richard Merrill, the late co-creator of the Foveon X3 sensor technology. It will also see a minimum suggested retail price drop to US$3,300 (street price will be at US$2,299) as a result of "efficiencies in the camera’s production". This is a massive price drop as the camera is currently going for US$6,899.
The current DP1 and DP2 rangefinder-style cameras also receive a massive sensor upgrade. Now called the DP1 Merrill and DP2 Merrill, each of them will get the APS-C Foveon sensor that’s in the SD1. The biggest difference between the two cameras is their lenses: the DP1 Merrill will use a wide-angle 19mm F2.8 lens (28mm equivalent), while the DP2 Merrill will get a 30mm F2.8 lens (45mm equivalent).
Source: Imaging Resource