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Old 11-03-2013, 04:41 PM
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5ash (Philip)
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Off axis guiding with a Schmidt cassegrain, any comments appreciated

I am successfully guiding my SW ED80 using a piggy backed orion short tube 80 and ASI130MM camera with PhD . How hard would it be to use an off axis guider using this camera with my celestron 9.25" at f6.3 ? Finding guide stars with the Orion 80mm and camera was very easy but I can imagine not so easy with a pick off prism as its field of view and that of the larger telescope will be much smaller. I don't want to waste money on an off axis guider if it is going to be too hard to use but am up for the challenge. Any advice would be appreciated.
Philip

Last edited by 5ash; 11-03-2013 at 04:48 PM. Reason: Addition
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Old 11-03-2013, 05:56 PM
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Merlin66 (Ken)
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Philip,
I use an QHY5 and /or the Lodestar on a beamsplitter (similar to the OAG) originally on the C9.25 and now on the C11 at both f10 and f6.3 for spectroscopy.
No problems, no issues....
As long as you remember to set the guide and imaging cameras up during the day and fully understand the relationship between the two field of views (coverage and orientation) you should have few problems.
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Old 12-03-2013, 08:41 PM
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5ash (Philip)
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Thanks for the help Ken , will test the waters.
Philip
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