Thread: [SOLD] ED Diamond Refractor 120mm f9
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Old 21-12-2009, 02:36 PM
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csb (Craig)
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Location: Adelaide, Sth Australia
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Is it the BD 120mm x 900mm? Then it is f7.5 (900 / 120 = 7.5).

Andrews have the scope (120 x 900) BUT incorrectly list it as f9.

Skywatcher website list it as f7.5.