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Old 27-02-2011, 12:16 PM
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renormalised (Carl)
No More Infinities

renormalised is offline
Join Date: Apr 2008
Location: Townsville
Posts: 9,698
Go here....Hyperstar

It's a lens system which replaces the secondary mirror of your SCT and converts its F ratio from f10 down to as low as f1.8. Makes imaging a whole lot faster.
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