Thread: Orion LHD Lanthanum 80 degree UWA Eyepieces
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  #9  
Old 16-02-2018, 11:17 PM
Wavytone
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Join Date: Jul 2008
Location: Killara, Sydney
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ED elements have to be solid lanthanum glass to be effective - coating is pointless.

And hence the price of the LHD series. Ditto TV Panoptics which also use it, and FWIW the Vixen LVW42 which is huge lump of glass.
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