Celestron Homepage

Celestron Facebook Page
Celestron Twitter Feed
Celestron YouTube Channel
Celestron Blog RSS Feed
» Support Center » Knowledgebase » 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

 This answer was helpful  This answer was not helpful


Repair/RMA Procedure

 Search
 Login [Lost Password] 
Email:
Password:
Remember Me:
 
 Article Options
 Print Article
 PDF Version
 Email Article
 Add to Favorites
An award-winning legacy brand for over 50 years, Celestron has grown to become the world's leading telescope maker, and enjoys brand-name recognition among serious amateur astronomers for superior optics, outstanding design, and innovative technology. Celestron also develops a wide range of exciting products and technologies that enhance the science, outdoor and educational markets. At Celestron, we strive to inspire a sense of wonder, knowledge and fun in our customers and throughout our company.

© 2012 Celestron, LLC. All Rights Reserved.
Website content is subject to change without notice

ALL CELESTRON PRODUCTS ARE DESIGNED AND INTENDED FOR THOSE 14 YEARS OF AGE AND OLDER.

Site designed and hosted by: GammaFX, Inc. Design Studio

Catalogs

Select Store:

Links



Network Sites