Duncan, what format are you saving the images in and what software are you using? If you are saving in FIT's format the image will be grey scale. When you convert to colour the result may depend on your software settings. For example I use MaximDL and in the convert to colour window I can choose a lot of different camera models. If I choose some of the canon options it delivers images from mild red to over the top red. If I choose SBIG every thing is blue on the same image. Be patient the learning curve is not that steep. It won't be long before you will see the difference cooling makes.
Mark
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