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Dave
The VC200L is a 200mm F9 cat with a multi element corrector built into the focus tube/baffle inside the OTA so I was referring to the optional external F6.4 Reducer which screws onto the focuser outside the OTA, at the back end like an SCT.
The R200S is an 8" F4 Newtonian (focuser on side of tube).
Is it one of these? Or none of the above?
Cheers
Dennis
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