Sigma Corporation today, in combination with the announcement of the Sigma DP3 Merrill, announced a new version of the Sigma Photo Pro software. This version 5.5 in addition to support for the DP3 a new Monochrome processing mode. In this mode you will gain control over the monochrome appearance with a Color Mixer. To further replicate the old black & white film feel Film Gran Effect can be added to the conversion mix. You will have control over the size and roughness of the grain. This new version of Sigma Photo Pro will be available in February.