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Old 09-11-2012, 05:30 PM
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mithrandir (Andrew)
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Join Date: Jan 2009
Location: Glenhaven
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Originally Posted by graham.hobart View Post
Thank you sir, I have a suspicion that my calculations are wrong because of the added length of the focuser assembly. Will do what you say when the clouds are gone.
Graham it's not the physical length of the bits. It's the optical length. eg a C8 is physically ~450mm whereas it is 2000mm optically.
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