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Hi Roger,
Thanks for your answers to my various questions. I've written to Terry Platt at SX about the green colour stars. I'll be interested to hear his response particularly to learn if this is just an anomaly we just happen to see or an actual "issue' with OSC.
Personally I don't think you absolutely need to treat the images any differently than a DSLR. In CCDStack you can play with the settings and immediately produce a colour image from each subframe. Just untick R/G/B but leave color ticked. Then select the correct Bayer pattern. Out comes the colour image. I think you can do that and stack the results. Whether that is the best way to treat the data is open to question. On the other hand it ought to be possible to take DSLR images and extract each color in CCDStack and do the individual stacking before generating colour.* The trick there is to type the word "Bayer" in the filter column of the image manager. Once you do that all the color controls become available. Adam Block said in doing individual stacks of each colour that it is essential that the same subframe be used for registration of each colour. That has worked well for me.
Peter
* Having not used a DSLR I'm now unsure about that remark! Does the camera immediately give you a colour image? If so it still might be possible to split the colours and then stack the individual subs and finally recombine. I have a feeling that this might give superior data rejection compared to rejecting RGB and then stacking.
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