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Old 07-08-2008, 09:51 AM
pjphilli (Peter)
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Join Date: Jan 2008
Location: Thornleigh Sydney
Posts: 638
Coloured Stars With Dsi Cameras

Hi
I originally posted this in the Equipment forum but it was pointed out that this would be the most appropriate place.
I image using DSI I or II cameras on a Meade 80mm f6 APO refractor.
I have done star tests using a high power eyepiece on the above scope and it shows no sign of bad collimation or chromatic abberration. However, both single and stacked images always show coloured background stars as per attached sample which is a composite of 30x1minute guided images of the Omega nebula in Sagittarius stacked, aligned both translate and rotate, combined, stretched in ImagesPlus. Any ideas what's wrong?
Cheers Peter
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