Johnny,
ED is Nikons designation for 'E'xtra low 'D'ispersion glass. Nikon puts
these letters (and the gold label) on lenses that incorporate one or more
elements that are made of this type of glass. ED glass, to my
understanding, reduces flare, ghosting and perhaps some other undesireable
traits inherent in lens designs that have a large number of elements, such
as zooms and long teles.
Hope this clears things up a bit. BTW, Nikon is not the only lens mfr to
use "ED" type glass. I believe Sigma refers to this type of glass as "LD"
in thier lenses.
Jim Korczak
Pocono Mountains, USA
>>>>>>>>>>>>>>>>>
Date: Tue, 01 Dec 1998 06:42:47 -0800
From: Johnny Rico <[EMAIL PROTECTED]>
Subject: Re: nikon-digest V4 #142 [v04.n143/7]
Message: 7
Nikon lenses confuse the heck out of me. I recently purchased a Nikon ED
70-300 4-5.6D lens (mainly
for wildlife shots, i.e. flying birds). I know what the "D" means, but
what does the "ED" mean? My
other Nikon lense does not bear this gold insignia. Thanks. Will report
on the results of the lens
when the film comes back. RJB.
------------------------------
>>>>>>>>>>>>>>>>>
