Thread: Ngc 6559
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Old 17-07-2012, 03:38 PM
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Peter.M
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Join Date: Sep 2011
Location: Adelaide
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Thanks Greg, the excess green is due to a weird thing that happens sometimes with my flats. If I calibrate my red frames one part of the image has misalignment in the stars (by a long way) so after I stack them there are multiples of the same star, If I dont use any flats there is no missalignment. So the excess green is due to there being some vignetting in the red that is uncorrected.
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