Archived posting to the Leica Users Group, 1997/12/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 08:28 PM 12/18/97 -0800, you wrote: >refocused with varying temperatures. I now have 180, 300 and 400mm Nikkors >with ED glass in them (actually, I believe the 400 may have a flourite >element, but I haven't been able to confirm this) that all exhibit this >behaviour, but to a lesser degree. Chuck Westfall told me that only Canon uses fluorite elements, because they have a patented technique for artificially growing fluorite crystals. The only way to make affordable crystals big enough to make elements. ========== Eric Welch St. Joseph, MO http://www.ponyexpress.net/~ewelch Is reading in the bathroom considered Multi-Tasking?