Archived posting to the Leica Users Group, 1998/12/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Assuming from your message that Schott is the actual manufacturer of Leica spec'd glass, is there a specification that Leica includes when having glass made by Schott, or whomever, that specifies the acceptable size of the bubbles? Peter K - -----Original Message----- Erwin Puts wrote: The Schott catalogue identifies four classes of the incidence of bubbles, from zero to three. The zero class has an extremely low amount of bubbles per volume unit and class three has a higher amount.... - ----------------------------------