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That seems to be a short tube for an classical cassegrain, the focal ratio of the primary must only be about F 2.5. A bit faster than is normally associated with C.C. which leads to larger central obstruction, quoted at 33%, not ideal if wanted for visual planetary observing.
Would love to have a look through one all the same and would also love to see comparisons with 8" Schmidt Cass. and 180mm Skywatcher Maks. Waiting with bated breath.
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