Archived posting to the Leica Users Group, 2002/01/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 08:06 PM 1/21/2002, you wrote: >At 05:11 PM 1/21/02 -0500, B. D. Colen wrote: > >Come on, Marc. It may be an option for you. But I know I would never want to > >go back to glass lenses and have to carry that weight around on my nose all > >day. There are, however, some really good coatings now for hardening plastic > >lenses. I've had glasses for six months, a year, without a single scratch of > >any kind. > >I have bad eyes and my glasses are not light -- but glass is the best way >to go. The weight is meaningless. The heaviest pair of glasses weigh a >LOT less than does the smallest Leica lens, after all. > >I do agree about modern plastics and coatings, though. I am experimenting >with a pair of plastic glasses at the challenge of my optometrist, and I >have now had them for two years, and they work fine so far. I have not >babied them -- but my M3 has yet to mark them in the least. > >But, still, glass is the way to go. In an ideal way, yes I'd prefer glass...but when one is dealing with -8.25 and -10 nearsighted eyes, glass is simply not an option. The weight and thickness are uncomfortable beyond description; almost painful. Without correction I cannot focus beyond three inches from my eyes; with correction I approach 20/20 pretty well. High index diffraction polycarbonate lens reduced the thickness at the periphery of my lenses from almost 1/2 an inch to about 1/4 of an inch, and reduced the weight something extraordinary. - -- Craig Zeni - REPLY TO -->> clzeni at mindspring dot com http://www.trainweb.org/zeniphotos/zenihome.html http://www.mindspring.com/~clzeni/index.html Entropy isn't what it used to be. - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html