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34-43 mm secondary mirror
I am "propdobing" a GSO 200mm F5 Astrograph. It comes with a 62mm secondary to work with a 2" focuser. I now understand this makes it suited for photography.
I will be using it with 1 1/4" eyepieces and Newt for the Web says a smaller secondary will work just fine, giving a range of between 34-43 mm.
My ideal is 40mm. I am in Wollongong. Andrews is closed until 11th and Bintel do not sell that size. Does anyone has one they no longer need?
Last edited by mork; 02-01-2018 at 05:26 PM.
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