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Topic: Astro Imaging star circles (Read 1630 times)
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swphot
Posts: 3
Astro Imaging star circles
«
on:
19:23:41, 01 July, 2010 »
I am having a problem with coloured fringing around stars which when processed in DeepSkyStacker appear as concentric rings. I have checked and it is not a focussing problem as appears probably at first sight. It appears more like chromatic aberration, but should not be with the equipment used (listed below). I have enclosed two images, the first an unprocessed .fits image from CCDSoft (converted to .jpg for convenience) and the second a processed image in DeepSkyStacker. Can anyone make any suggestions as to the cause. The same problem occurs if I use no filters, or a IR/UV blocking and CLS filter.
Equipment: Takahashi TOA-130F and SBIG ST-2000XCM
Exposure: 2min binned 1x1
[attachment deleted by admin]
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swashy
UKAI GFX Guru
Administrator
Galactic Poster
Posts: 14644
Re: Astro Imaging star circles
«
Reply #1 on:
19:35:35, 01 July, 2010 »
Turn
off
the Hot Pixel detection in the 'register' dialogue box and 'stacking' dialogue box
worked for me when I had a similar problem, see my thread
here
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Ade
Imagine... above us only sky!
swphot
Posts: 3
Re: Astro Imaging star circles
«
Reply #2 on:
20:41:43, 01 July, 2010 »
Brilliant - many thanks Swashy - it worked a treat!
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swashy
UKAI GFX Guru
Administrator
Galactic Poster
Posts: 14644
Re: Astro Imaging star circles
«
Reply #3 on:
21:04:31, 01 July, 2010 »
Good to hear it
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Ade
Imagine... above us only sky!
GJBC
Poster God
Posts: 1157
Re: Astro Imaging star circles
«
Reply #4 on:
00:33:13, 02 July, 2010 »
Ade you are a star, I tried for ages with Ed to day to get this to stop.
There you go Ed now put all that with what we went through to day and you will have a couple of super shots oh yes and a headache from the steep learning curve. and then there is the back catalouge you are going to have to go through again to get rid of all those little donuts on all the other shots.
good to see you today
Grahame
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Grahame
Meade LXD 55 10", MX5c, LPI, and a Perm well alarmed dome as their home.
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