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#1 jimarshall


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Posted 19 March 2009 - 09:13 PM

I had a quick look at the trapezium last night and saw both E & F, so I thought it was going to be a good night for imaging Saturn. I waited about an hour for Saturn to rise higher before I started, unfortunately the higher it rose the worse the seeing got. I looked back at the trap when I was through and no longer could see E & F. I use a 1970 C8 with a 2X barlow and SPC900NC. This is a 530 frame stack of 1351 processed in RegiStax and Photoshop.

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#2 sfugardi



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Posted 20 March 2009 - 06:03 AM

Jim, excellent image! Under mediocre seeing I've had decent luck capturing at least 5x more frames than I intend to stack. It's great to see images from an vintage Celestron orange tube! I've got a "newer" Compustar C11 with the original optics, finally cleaned last year after 22yrs. Have you ever cleaned or recoated your optics? I was thinking of replacing my optics but it is expensive and I am not sure if the quality today is better or worse than what I have now.


#3 jimarshall


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Posted 21 March 2009 - 12:38 PM

Hi Steve,
I have brushed the dust off of the primary and cleaned the corrector with a no streak cleaner several times, but not very often. It's been cleaned about 4 or 5 times over the last 30 years. I am sure the mirror has lost some of it's reflectivity over the years, but it still performs well. Here is a new image that I took last night under better seeing conditions with Saturn higher in the sky.

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#4 RobertED



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Posted 21 March 2009 - 12:52 PM

That is just an excellent image of Saturn, Jimarshall!!! Nice work!! :waytogo:

#5 Chris_H



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Posted 21 March 2009 - 01:01 PM

Well done! Your last one is very good

#6 Fusion


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Posted 22 March 2009 - 12:20 PM


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