Re: lens 'recipes'

From: murrayatuptowngallery@xxxxxxxxx
Date: 24 Apr 2007 07:26:36 -0700

One more question...oops, two

Is it possible to determine type of glass by density (weigh lens and
measure displacement of water), or can a local optician measure N?

Or will any of these methods be lucky to get 1 decimal place of
precision and thus not be able to distinguish type?

Thank you

.

References:
- lens 'recipes'
  - From: murrayatuptowngallery

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