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Which are the rarest refractors?

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#1 Lucullus

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Posted 05 September 2019 - 10:48 PM

Recently, I saw a post mentioning a Vixen telescope, the Vixen 150 ED Atlux, and comments that it is a rare, even a very rare beauty. That got me googling and I found this website https://stargazerslo...-please-remove/ where it is said that only six of those exist in Europe. Six!
I am wondering how many exist in the world?
And what are other equaly rare refractors?

#2 ngc7319_20

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Posted 05 September 2019 - 11:21 PM

These two came to mind, but I dont know how many were made:

 

Showa 100mm f/10 SD APO

https://www.cloudyni...10-sd-apo-r1161

 

APOMAX 130 F/12

https://www.cloudyni...-refractor-r869


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#3 Nippon

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Posted 05 September 2019 - 11:50 PM

I would think the Nikon 100 f/12 ED and the Zeiss APQ apochromats are fairly rare. In the non refractor world I don't think Takahashi made many TSC225 SCTs. 


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#4 Nippon

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Posted 05 September 2019 - 11:53 PM

But then again the 40" Yerkes refractor is real rare. I believe only one was ever made:)


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#5 25585

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Posted 05 September 2019 - 11:59 PM

https://www.astrobuy...php?view=152001


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#6 HydrogenAlpha

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Posted 06 September 2019 - 12:22 AM

The first refractor built by galileo?


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#7 Traveler

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Posted 06 September 2019 - 12:37 AM

 Zeiss APQ apochromats are expensive but not very rare. In fact I have seen them many times.

 

I think the degree of rareness depends on the geography/location. So i think a scope can be rare in the US but doesn't have to be rare in Europe or for example in Japan.


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#8 Cali

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Posted 06 September 2019 - 12:43 AM

I _think_ there are only two of these around.

 

- Cal



#9 Suavi

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Posted 06 September 2019 - 12:47 AM

From current offerings probably Agema, also CFF, particularly CFF 105mm f/7 and f8.7 refractors.



#10 Marcus Roman

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Posted 06 September 2019 - 02:32 AM

My opinion:

 

- Takahashi FCT125

- Mizar FA80

- Showa 100 f10

- Pentax 105SD ("red ring")


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#11 markb

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Posted 06 September 2019 - 03:43 AM

For cataloged production scopes, Tasco 20TE?


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#12 Bomber Bob

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Posted 06 September 2019 - 05:42 AM

For cataloged production scopes, Tasco 20TE?

Tasco 20TE -- I know of only 2.  Probably a few more out there in attics / basements.

Carton CST-100DX -- Blue Beauty!  Tripod or Pedestal versions, I've seen one of each in ads.

Showa 100 --  I hesitated on an opportunity to buy one, and it was gone!

Mizar FA80 -- I think Koji has one now, but I don't need another 3" refractor.


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#13 MalVeauX

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Posted 06 September 2019 - 06:11 AM

Big ones.

 

Very best,


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#14 walter a

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Posted 06 September 2019 - 07:10 AM

GOTo Comet Type 2, [the only one that has turned up thus far]

Attached Thumbnails

  • DSCN0100 (640x480).jpg
  • DSCN1384.JPG

Edited by walter a, 07 September 2019 - 07:05 AM.

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#15 Kunama

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Posted 06 September 2019 - 07:32 AM

Berry & Mackay 3.25” F15.... yet to find a second one...



#16 bbqediguana

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Posted 06 September 2019 - 07:35 AM

I once built a one-off refractor using the storage tube of a bottle of Glenfiddich Solera Reserve as the OTA, some spare parts, and the 80mm objective from a ST80.

 

I called it the Single Malt Refractor! smile.gif

 

Just one ever existed... but I don't know where it is. I think I gave it away to a Scotch / Astronomy enthusiast...

 

1507039079SSP_8462.JPG


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#17 Esso2112

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Posted 06 September 2019 - 09:53 AM

There are a lot of “rare” scopes out there. It depends on how many were made and how many of the old ones have survived. I have three scopes that are generally considered rare:

1) Brandon 130 (100 made with AP triplet)
2) Tak FCT-125 w/ original reducer
3) Original AP Stowaway f5

Others just seem rare since they don’t get sold as often and people hang on to them.

#18 Derek Wong

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Posted 06 September 2019 - 11:30 AM

Sticking to scopes that are 40 years or less old.  There must be a ton more...

 

--Astro-Physics 9-10” scopes plus a variety of smaller models including 130mm and 155mm ED doublet models

--Goto 80mm f/15 fluorite (not ED) doublet

--Nikon 6” and larger (outside of Japan)

--Pentax 4” f/12 ED triplet (see Astromart ad 1494)

--Stellarvue 127/135 dual fluoro

--Takahashi FCT 125, FC 150 (f/11.3), and FCT/FET 200/250

--TMB/APM 12” refractor with dual OK4 elements (apparently one went to China)

--Televue 140 (40 made but seen in US more than other rare scopes)

--Zeiss APQ 80mm, 105mm, 110mm and 200mm - few prototypes

 

Derek


Edited by Derek Wong, 06 September 2019 - 11:32 AM.

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#19 Scott99

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Posted 06 September 2019 - 12:05 PM

I would have said Zeiss APQ - do we know how many were made?  Maybe they're just rare on this side of the Atlantic.

 

Definitely the 5 & 6-inch Unitrons too - they're almost mythical in status, the 6-inch seemed to appear in a lot of magazine ads but nowhere else



#20 Astrojensen

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Posted 06 September 2019 - 02:14 PM

I would have said Zeiss APQ - do we know how many were made?  Maybe they're just rare on this side of the Atlantic.

APQ 100/640: About 40.

APQ 100/1000: Many hundreds, possibly over 1,000

APQ 130/1000: about 200-250

APQ 150/1200: around 40-50.

 

Several prototypes also exists. There's two APQ 80/500 out there, plus two APQ 200/1600. Zeiss also made some doublet objectives, the AQ. There's a guy in Germany that has an AQ 125/1000. 

 

 

Clear skies!
Thomas, Denmark


Edited by Astrojensen, 06 September 2019 - 02:17 PM.

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#21 t.r.

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Posted 06 September 2019 - 02:19 PM

While the AP Star 12 ED comes up for sale often, only about 50 were made and RC himself refers to it as rare! The couple of oil-spaced ones are rare as hens teeth as the design was air-spaced for most of production.

Edited by t.r., 06 September 2019 - 02:21 PM.


#22 Astrojensen

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Posted 06 September 2019 - 02:19 PM

I have an 85mm f/19 Zeiss A apochromat made in 1904. Only FOUR with this aperture were ever made and this is possibly the only surviving sample. The mount is not original, it's a Vixen Saturn.

 

gallery_55742_4772_52798.jpg

 


 

Clear skies!
Thomas, Denmark


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#23 Bomber Bob

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Posted 06 September 2019 - 02:45 PM

This Royal Astro Optical 76mm F15 refractor isn't rare, but this complete kit is -- only 6 are known to exist:  1964 Sears Model 6336 Professional-type Motorized Observatory

 

P19 - Full Right Side CN2.jpg

 

There are hundreds of these RAO OTAs out there, re-branded by Mayflower, Sans & Streiffe, Sears, Tasco, and Royal.  I can't recall reading any negative posts about their optical quality.  The lens in my 6336 has a near-perfect DPAC pattern.

 

And, it just looks so cool standing in my man cave.


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#24 Scott99

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Posted 06 September 2019 - 03:07 PM

While the AP Star 12 ED comes up for sale often, only about 50 were made and RC himself refers to it as rare! The couple of oil-spaced ones are rare as hens teeth as the design was air-spaced for most of production.

so we have confirmation of this?  Wow, it does seem like there are more out there.  Maybe turn-over is higher because of the intermediate size....people want to upgrade to a 5 or 6 inches or back down to a 4-incher.

 

I do have one of the oil-spaced lenses...will have to check the serial #.  

 

I had no idea there were so many APQ's - almost as many 100's and TEC140's have been made.  Surprised I haven't owned one by now lol.gif lol.gif


Edited by Scott99, 06 September 2019 - 03:07 PM.


#25 buddy ny

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Posted 06 September 2019 - 03:44 PM

Apomax 130 mm F/12
Under 30 I think were made
Passed on one in the early nineties
Cool looking scope


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