Quote:
Originally Posted by PostalRuhl
Is this a doublet or Triplet ED Refractor?
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The link provided by Daniel states it is a doublet...
Quote:
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Originally Posted by http://www.telescope.com/Orion-Premium-110mm-f7-ED-Apochromatic-Refractor-Telescope/p/9206.uts
Air-spaced 110mm (4.3") doublet refractor lens has one element of ED glass for reduced chromatic aberration
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