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Astrophotography and Sketching >> Beginning and Intermediate Imaging

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nexguy
member


Reged: 08/05/09

Loc: Wichita Falls, TX
50mm auto guider + barlow = more accurate guiding?
      #6409944 - 03/04/14 05:41 PM

I use the 50mm orion auto-guider package with my 1370mm AT6RC scope which is quite a disparity. Would adding a barlow to the auto-guider allow the for more accurate corrections and steadier images(CG-5 AGT mount)? I realize this would limit guide star choices but I can't think of any other downsides.

Thank you!

edit: for example, this 2x barlow might do the job?
http://www.telescope.com/Orion-Shorty-125-2x-Barlow-Lens/p/8711.uts?keyword=1...

Edited by nexguy (03/04/14 05:47 PM)


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Madratter
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Reged: 01/14/13

Re: 50mm auto guider + barlow = more accurate guiding? new [Re: nexguy]
      #6409971 - 03/04/14 05:58 PM

I can. Those limited star choices make a big difference in terms of SN ratio. And low SN ratio means poor guiding. I can guide to <.5 arc-seconds with a 50mm guider and a guide camera with larger pixels given good seeing. The limitation is your CG-5 mount more than the guider. But by all means try it and see how it works for you.

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