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Thanks for the comments guys.
What I'm really after is a use for the parts of an 8" SCT I have, complete except for a smashed corrector plate. I might give the lensless Schmidt idea a try. It's a Celestron, so I suppose the primary is f2 and the secondary is 5x.
So the aperture stop would be 800mm from the primary? Any idea what size the stop should be?
Cheers,
Jason.
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