> 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? * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
