There is the ARIES 12" Fluorite doublet (in Japan) and it does work.
14" (kurtz-flint based) triplet APO by LZOS still wait it's buyer.

nonsense, the 14" was sold and shipped long time ago to Korean customer

How it will performs under sky is still a question. Thermal problems
can be significant.
As for 21". There is no warranty, that it will be succesfully realized
and that it will really work - again thermal problems and figure
stability (due to gravity).

nonsense again, the 21" Apo will be done and shipped till end of 2006,
if you want to see how it works come then over to Germany :-)

LZOS can do at this moment Super ED Apos up to 330 mm diameter and the
melting department is working on getting larger blanks. The expected max
size will be somewhat between 14 inch and 16" correspondance to the lZOS
melting department

Markus


VD




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