Thread: a 100mm Mak-cass as a guide scope?
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Old 13-09-2005, 08:18 PM
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avandonk
avandonk

avandonk is offline 		 
Join Date: Aug 2005
Location: Melbourne
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An even cheaper alternative is one of those 600mm F8 camera Mirror lenses or
use a cheap achromatic lens.Using a focal reducer gets more stars in the field.
A focal length of 300mm is adequate for autoguiding an ED80.
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