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ED glass and low light

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Category: Scopes
Forum Name: Rifle Scopes
Forum Description: Centerfire long gun scopes
URL: http://www.opticstalk.com/forum_posts.asp?TID=29078
Printed Date: March/28/2024 at 14:32
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Topic: ED glass and low light
Posted By: maine(r)
Subject: ED glass and low light
Date Posted: May/20/2011 at 07:58
Does ED (FL) glass make a measurable difference in the low light capabilities of a scope?



Replies:
Posted By: Kickboxer
Date Posted: May/20/2011 at 08:15
TRUE ED glass primarily eliminates secondary chromatic aberration which is a failure of the lens to focus all colors to a single point, which causes a fuzziness in the image and color "smearing".  So, yes ED glass will improve your visible image.  A lot of ED glass is only marginally appropriately named.  Nikon invented ED glass in the mid-70's.

Follow the link below to a pretty good discussion of ED glass and some of the common misperceptions about it:

http://www.opticstalk.com/ed-glass-vs-other-features_topic18435.html


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