Quote:
Originally Posted by Hans Tucker
I note the constant use of LZOS OK4 Fluorite in the Astronomylive product description. As I have read OK4 is not Fluorite, so is the main element on this refractor objective OK4 or Fluorite. Even if Fluorite the $10K price tag is not justified for 4.8" scope. The soon to be released FSQ-130 would be a better investment if you are going to fork out $10K for a refractor, at least you will be getting more glass for your money.
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Having owned both an AP155, a TEC 160ED and had the long-term use of an APM 130, I can attest that none of them were as out 'n out sexy as the Moonraker tube!!
At any rate that 4.5"ish is spot-on a perfect size for my ancient back and I doubt you'd notice the 7mm difference between it and an AP130.
From what I can glean, Russian OK4 is a fairly close match for FPL53. Perhaps with a little more lead & fluorite as H&S laws are probably not as strict in Russia!!
Heck, it could be made of crushed coke bottles for all I care.
Where LZOS shines over its competition is in the figuring of the lens elements.
Only AP and TEC are a match at any given aperture and with our $ in the sink, you'd wind up paying close to 10K for an AP or a TEC anyhow.
A Takahashi I wouldn't give house room!