Archived posting to the Leica Users Group, 1998/10/01
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Harrison McClary writes:
>Great, glad to know that expensive piece of glass on the front of my
>camera is Corning-ware....does this mean I can cook with it also?
>Paul T. Collura wrote
>>Leica glass is mostly
>>supplied by Corning France
Don't forget that it was Corning that solved the problem of casting a
200-inch mirror for Mt. Palomar. Existing glasses had coefficients of
thermal expansion too great for such a large casting to cure without
cracking. Borosilicate glass was invented by Corning in response...
remember Palomar next time you use a borosilicate (Pyrex, Corningware)
baking dish!
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Alexey Merz | URL: http://www.webcom.com/alexey | email: alexey@webcom.com
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