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ED glass and low light

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/20/2011 at 07:58
maine(r) View Drop Down
Optics GrassHopper
Optics GrassHopper

Joined: December/26/2006
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Does ED (FL) glass make a measurable difference in the low light capabilities of a scope?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/20/2011 at 08:15
Kickboxer View Drop Down

Joined: February/13/2008
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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:
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