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PostPosted: Sun Mar 20, 2016 10:10 am 
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Joined: Sun Dec 02, 2007 10:31 am
Posts: 832
Location: Telford
Hi Guys
I want to get back into doing some Astro Imaging with my “Unmodded” Canon 450D.
I will be using my Meade LX10 8” SCT OTA on my HEQ5 mount
I will also be using my 0.63 Celestron focal reducer to give me f6.3
I need to get either an Astronomik CLS or CLS-CCD Clip Filter to put into the 450D to cut down on light pollution when taking subs longer than 2 minutes.
My question is which option should I go for ?
CLS or CLS-CCD ?
Your help would be very much appreciated
Graham

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Meade LX 10 8" SCT OTA, HEQ5,
Celestron X-cel LX 7mm,9mm,12mm,18mm,25mm
Skywatcher Panaview 32mm
Revelation 2" 42mm
William Optics Binoviewer
William Optics SCT Crayford Focuser
Olympus 8X40 DPS I binoculars


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PostPosted: Thu Jun 23, 2016 8:05 pm 
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Joined: Wed Mar 07, 2012 4:04 pm
Posts: 9
Hi there,
Basically if you are imaging with an unmodified DSLR then it doesn't matter if you go for the CCD version or the visual version as the filters already fitted to your camera will exclude unwanted UV and IR light. But if you have a modified camera you need the CCD version of any light pollution filters. This will pass the deep red of Hydrogen-alpha light which you need to get good nebula images but will still cut out UV and IR which the modified camera is very sensitive too. Hope that helps.
Cheers,
Alan C.


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PostPosted: Tue Jun 28, 2016 9:39 am 
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Joined: Thu Jun 23, 2016 9:16 am
Posts: 12
Location: California
clitherowclan wrote:
Hi there,
Basically if you are imaging with an unmodified DSLR then it doesn't matter if you go for the CCD version or the visual version as the filters already fitted to your camera will exclude unwanted UV and IR light. But if you have a modified camera you need the CCD version of any light pollution filters. This will pass the deep red of Hydrogen-alpha light which you need to get good nebula images but will still cut out UV and IR which the modified camera is very sensitive too. Hope that helps.
Cheers,
Alan C.


Thanks for the helpful information :)


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