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Fluorite forever!

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#1 25585

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Posted 09 July 2020 - 11:43 PM

Back in the early 1990s when I first saw a Vixen fluorite lensed refractor I started wanting a fluorite lensed refractor. It took almost 30 years to buy one, a Tak FC100DL. The wait was worth it.

 

Though there are equally excellent apos made now without fluoride lenses, that optical acorn "ingredient" planted in my one-day desire to own, remained. Nourished by retirement (out all night, sleep all day), more money saved, and realising that "its now or never", I acquired my 30 year long dream. Not once disappointed yet. In fact I have it separately itemised it in my will to go to my brother along with my TV Genesis.

 

While maker & brand supremacism are the joint zeitgeists of refractor enthusiasts, in public anyway, does anyone else choose optics, and especially fluoride, as first priority?

 

 

 

 


Edited by 25585, 09 July 2020 - 11:53 PM.

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#2 Erik Bakker

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Posted 10 July 2020 - 12:50 AM

For visual observations, the fluorite doublets are my favorites and the instruments of choice in the current production 2.4"-4" refractor aperture range. The sheer quality, purity and beauty of their images is unrivaled in their aperture range and they are always the first to reach their peak performance when putting scopes outside to observe with under the stars waytogo.gif

 

Current production fluorite doublet scopes like the FOA-60 and FC-100 DZ will likely be the gold standard in their aperture classes for years to come.


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#3 Bowlerhat

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Posted 10 July 2020 - 01:32 AM

Until new type of glass is found, it's still the best.


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#4 EricR

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Posted 10 July 2020 - 08:04 AM

I don't currently own any fluorite refractors but I will say this -- something always felt "special" about the views  in my old Stellarvue SV90T-BV with true Calcium Fluoride (CaF2) triplet lens. Often wish I had never sold it.


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#5 Scott in NC

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Posted 10 July 2020 - 09:10 AM

I don't currently own any fluorite refractors but I will say this -- something always felt "special" about the views  in my old Stellarvue SV90T-BV with true Calcium Fluoride (CaF2) triplet lens. Often wish I had never sold it.

I wish I still had my old one too.  But alas, it became a victim of the “I have way two many small refractors with similar apertures and focal lengths, and something has to go” conundrum.  


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#6 Paul G

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Posted 10 July 2020 - 11:51 AM

I understand and am glad you fulfilled your dream. Life is about the experiences. Enjoy!

 

Personally I pay no attention to the types of glass used, instead I rely on the maker's reputation for making well designed, well figured, smooth optics. I have three scopes with the same aperture from the same excellent manufacturer, using three different types of exotic glass, one of which is fluorite, one FPL53, one Hoya FCD100 (FPL53 contains fluorite). I see zero difference between the views. The only thing fluorite does is allow the manufacturer to make a somewhat faster scope of the same aperture and same color correction.


Edited by Paul G, 10 July 2020 - 11:56 AM.

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#7 payner

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Posted 10 July 2020 - 12:48 PM

I tend to mirror what Gus said. To me, it is first and foremost the reputation of the manufacturer and general design (the latter a personal variable I like to entertain/consider, but know a reputable manufacturer will have solid designs for each prescription).


Edited by payner, 10 July 2020 - 05:10 PM.

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#8 donadani

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Posted 10 July 2020 - 02:36 PM

One of my most liked scopes has an ED element made of FPL51 shocked.gif - as we all know it´s not only the ED element that counts but the combination of all glas and it´s forming.

 

But aside knowing that - of course only fluorite offers the real magic lol.gif waytogo.gif


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#9 barbie

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Posted 10 July 2020 - 03:54 PM

For visual observations, the fluorite doublets are my favorites and the instruments of choice in the current production 2.4"-4" refractor aperture range. The sheer quality, purity and beauty of their images is unrivaled in their aperture range and they are always the first to reach their peak performance when putting scopes outside to observe with under the stars waytogo.gif

 

Current production fluorite doublet scopes like the FOA-60 and FC-100 DZ will likely be the gold standard in their aperture classes for years to come.

Absolutely!! My  Tak 76mm F12.75

Fluorite Apo gives the purest images of anything in it's aperture class that I've ever owned!


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#10 gwlee

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Posted 10 July 2020 - 11:08 PM

does anyone else choose optics, and especially fluoride, as first priority?

No, I usually have a long list of optical, mechanical, and ergonomic requirements I am trying to satisfy with a new scope and try pick the scope that comes closest to balancing all of these requirements.

 

I think about the mount, tripod, and OTA as a system, and I am looking for the system that’s best suited for my use at my observing site, not necessarily the “best telescope” or the “best telescope glass.”


Edited by gwlee, 10 July 2020 - 11:15 PM.

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