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Old 31-10-2022, 03:03 PM
glend (Glen)
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glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,121
There are still plenty of long focal length refractors around, and they do not have to be triplets. Up above f12 a good Doublet is well corrected, and much lighter than a triplet. My iStar Doublet is a very nice scope, but living with a long refractor can be problematic due to the swing room they require, not to mention the storage space.
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