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8" F/4 atsrograph advice needed.
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17-02-2012, 12:25 AM
jjjnettie
(Jeanette)
Registered User
Join Date: Feb 2005
Location: Monto
Posts: 16,738
I feel your pain.
They're a damn fiddly thing to collimate.
My 10" dob was a breeze compared to the 200mm F4.
jjjnettie
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