Thread: Dew shield for dobs
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Old 01-05-2005, 09:51 AM
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Starkler (Geoff)
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Wouldnt it be as simple as this ?

L = Distance from mirror to end of tube
D = diameter of primary mirror.
M = max fov.

Tube diameter required = D + L tan(M)
Last edited by Starkler; 01-05-2005 at 10:00 AM.
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