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Old 19-05-2005, 09:19 PM
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acropolite (Phil)
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Join Date: Feb 2005
Location: Launceston Tasmania
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Coundn't find the original mention of 3.5x but I did a search and found a good explanation. It seems that barlow magnification is increased with any extension before the barlow. http://www.astunit.com/tutorials/barlow.htm
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