Thread: Stratus or Hyperion? (or any other ideas...)
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Old 24-10-2008, 01:58 AM
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glenc (Glen)
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glenc is offline 		 
Join Date: Jun 2005
Location: Terranora
Posts: 4,406
My Stratus 21mm with a UHC filter is parfocal with my two Hyperions. Without a filter it is not.
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