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Stellarvue 102BV

Started by mnevitt, 12/08/2005 10:56PM
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Posted 12/08/2005 10:56PM Opening Post
Mark Nevitt
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Join Date: May 2005

Location: Middlesex NJ, US

Posts: 10

I was at the Stellarvue website reading a description of their
102BV. In the descpition they state the 102 optical system provides excellent color correction thanks to high dispersion ED lens. I may be wrong butI thought that ED glasses were low
dispersion.

Mark
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Posted 12/09/2005 12:58AM #1
Roland Christen
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Join Date: Mar 2004

Location: Rockford IL, US

Posts: 1441

The term ED stands for "Extra low Dispersion". It applies the glaases with V numbers above 75. Not all ED glasses can be used to make apo lenses. Some ED glasses can only achieve achromat corrections.

Roland Christen
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