Archived posting to the Leica Users Group, 2009/02/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Well, I don't know about the sapphire screen, but the sapphire crystal on my Rolex has held up against hits bangs and other rough handling with not a single chip or scratch in over 18 years. ?I would expect the same of the sapphire screen on the Leica and other cameras that use them.? Gene -------------- Original message from Jeff Moore <jbm@jbm.org>: -------------- > 2009-02-03-21:11:36 Ric Carter: > > all this broken screen talk is making the sapphire glass sound better > > Well... it's making me wonder if it'd be better or worse. I'd expect it > to be far more resistant to scratching, as advertised -- but that's an > entirely different quality from toughness, resistance to shattering. > Often materials which are harder and more resistant to scratching > or wear are also more brittle. Just ask metallurgists, for example > those coming up with steel for knife blades, what they've always been > fighting with; or (to dive back to a favorite/hated LUG subject but one > that much more directly applicable here) folk familiar with different > watch-crystal materials. Sapphire crystals are beautifully resistant to > scratching (unless there's a softer optical coating on top), but they > can chip if subjected to a sharp knock. > > It'd be great if there were someone from whom we could get a straight > answer about the resistance of the new sapphire screen to cracking > relative to the old, instead of just theorizing. It'd depend on the > material, and on whether any changes had been made in thickness, shape > or mounting. > > -Jeff > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information