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well 10 to start with, but 14 eventually.
also Bird has just informed this newbie ATM grasshopper that a 10" f5 and a 14" f5 will not have the same focal length....so...... i will have to have two spider/focusser positions....would that be right?
I would like to be able to get GSO mirrors which i assume are f5.
This is going to be the contraptions of all contraptions
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