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lack of back focus is a big issue with fast Newtonians.
Found one reference saying that the distance from CC to the focal plane should be 55mm. Sorry, but I don't think that any of the SBIG gear fit if that is the case. The only option I can think of would be to use an RCC1 CC and modify the scope by moving the mirror up and fitting a larger secondary, but that would be a lot of work and even then, I think that you would only be able to fit in the FW, not the AO.
Last edited by Shiraz; 10-08-2014 at 07:31 AM.
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