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Okay, I can see the issue.
I have always made sure that the image of the star has been in focus. I have not worried obout the spectrum until I got to the processing stage. This is probably why the spectrum has always appeared "fuzzy" and indistinct. The colours are there, but thats about it. I thought this must have just been a function of using the gratings.
Once this weather clears, I will give it another go.
Thanks for the tip.
Darrell
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