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I agree, the performance of a telescope counts, not how it is made or what is in it. Regrading the Zeiss triplets (I am assuming you mean the APQ-series) they used lab grown Calcium-Fluorite. As the lens has to be a giant single crystal and therefore it is very hard to grow and it is also very brittle. That makes it difficult to polish (that is what makes real fluorite-apo's so expensive). The WO-Fluorite on the other hand does not use a Fluorite-lens. They only mix some Fluorite in the glass. Therefore WO should not call it Fluorite-Apo but they do anyway because there are no trade rules or anything. Skywatcher (Orion etc.) could call the 80-ED refractor also Fluorite-refractor because their ED-glass contains fluorite too. The bottom line is WO should not call their fluorite refractor Fluorite-Apo but as there is no law so they do it anyway...
Stephan
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