Here you go, check this baby out:
Stellarvue SV90T - 90mm fluorite triplet!
http://www.stellarvue.com/sv90t.html
http://www.stellarvue.com/astrophotography.html
You know a fluorite triplet is a rare rare lens. Only Tak and TEC
make them. Tak used to make them not any more. Their FCT
series is legendary and extremely expensive. TEC makes a fluorite triplet
for 160 and 180mm. They are US$13,000 and US$19,000 respectively.
So a 90mm fluorite (actual fluorite from Schott Glass in Germany not falsely labelled fluorite FPL53 glass from Japan) is amazing value at US$1995 (about AUD$2050).
Add a few hundred for shipping and a few hundred for GST.
Greg.