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» Support Center » Knowledgebase » Spotting Scopes » What’s the difference between a regular scope and an ED scope?
 What’s the difference between a regular scope and an ED scope?
Answer ED means extra-low dispersion and refers to the composition and optical properties of the glass used for the lenses.

ED glass is specially formulated including rare-earth compounds to greatly reduce chromatic aberration (colors not all coming to the same focal plane) compared to standard crown and flint glasses.

Besides getting rid of color fringes, ED glass scopes also yield sharper images because the fringes are no longer present to soften the focus.

EDF glass scopes have an ED glass element using fluorite, giving it even better performance, color-fringe free across the visible spectrum. 

Article Details
Article ID: 2086
Created On: Nov 18 2008 05:38 PM

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