On Thu, 29 Nov 2001 21:53:44 -0800 "Icoz, Evrim" <[EMAIL PROTECTED]>
writes:
> > OTOH, the UD glass put into the cheap third-party lenses are used in
much
> > smaller elements, and usually put in there for advertising purposes.
Take a
> > look at the Nikon 70-300 ED (which allegedly is a Tamron design). The
ED
> > element is tiny. 
> 
> Just curious - since all the light goes thru both the large lens and
also
> the smaller lens, does it matter which one is UD as long as one of them
is?
> Somebody who has better optics than I do?

It does make a difference........ much like driving instructions - it
matters a lot the order that you make your left and right turns!

Dave Herzstein
[EMAIL PROTECTED]
http://www.kjsl.com/~dave
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