DMK21 mono camera on Orion 8" Newtonian at F20. Meade RGB filters Processed with Castrator/Registax5/AstroImage. This is a TWO COLOR image. Only a Red filtered and a Blue filtered image were recorded. the final picture is a composite using Red as Luminance and true Red, Blue as true Blue, and an average of the Red and Blue as a synthesized Green. A so called RR(G)B image.