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Old 27-05-2012, 02:35 PM
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Waiting for next electron

marki is offline
Join Date: Mar 2008
Posts: 2,427
I have used the QHY 5 with my TSOAG9 and it can be focused if you remove the nose piece and use some T thread extenders. Unfortunately the QHY5 is not sensitive enough with this unit unless you take longish exposures. I am still to try the SBIG ST-i with this OAG but the prism is pretty small so not much light available. In your case you would have to add some spacers between the imaging camera and focuser tube to allow the guide cam to reach focus. If you use a little more then is needed you should be able to hit the sweet spot on both camera's.

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