Re: Use of stereo eyepieces in compound microscope???

In article <[EMAIL PROTECTED]>, Klaus Henkel 
<[EMAIL PROTECTED]> writes
> Aaron schrieb:
> > Calcium flourite is able to provide the excellent color correction
> > because of its very high refrative index.   The idea is to extend the
> > usefulness of the achromat design by substituting calcium flourite for
> > some of the glass elements.
>
> Dear Aaron!
>
> Yes. But: F L U O R I T E;    The element F l u o r.
Or, in English, the element fluorine. And the material (CaF2) is calcium 
fluoride, not calcium fluorite; the common name is however "fluorite".
--
David Littlewood