[Helo (Peter)]

Hi Grant and Andrew. Grant, if you get colour in Artemis you have to select Colour - Advanced - RAW (make sure colour is not checked). Then debayer after. Dawn is not intuitive so I watched the video on the CD and used their existing template to Debayer, Align and Stack and it worked fine. I still have a yellow/green cast on some more recent images of M42 and the Trifid nebula so I am thinking Andrew was right (sorry for not listening the 1st time Andrew - once I saw images with more colour in like M20 it was more apparent). Thank you both for your help - I am thinking a filter is now in order for the Hyperstar.