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I'm trying to work out why you actually need it. You have a 10:1 crayford on the back of an SCT? Then a straight forward Prime Focus adapter should be all you need (I'm assuming you are trying to attach a camera that has a T thread at the front, DSLR T Adapter or CCD thread). I'm not sure how the adapter your looking for will actually help you. Yes it has the potential to give you ridiculously long effective focal lengths but with the trade off of in credibly slow f ratios. I dont see how that is going to help you image deepsky objects with an sct that is already at f/10.
Or am I missing something here?
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