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In Praise of the Long Refractor

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#1 Frisky

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Posted 16 October 2021 - 08:02 PM

Not sure if I've posted about this before, but I love long refractors! My f8.3 120mm scope is barely a long refractor in my book! I'd like to see some new pics of monsters! 

 

Joe

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#2 teashea

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Posted 16 October 2021 - 08:17 PM

People like different things.  Your telescope does not look like one of those long skinny refractors - which I dislike so much.


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#3 Jethro7

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Posted 16 October 2021 - 08:39 PM

Hello Joe,

I really love well designed Long focal length refractors. Unfortunately they are out of voque. My Altair Starwave Ascent 102ED F/11 is an amazing scope for Lunar, Plantary, bright star clusters and splitting double stars. 

 

HAPPY SKIES AND KEEP LOOKING UP Jethro

 

Altair 102ED F/11 mounted in tandem with a AT102ED F/7

20201017 221439
 
 

 

 


Edited by Jethro7, 16 October 2021 - 08:44 PM.

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#4 Bowlerhat

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Posted 16 October 2021 - 09:29 PM

My f8.3 120mm scope is barely a long refractor 

Yes. F20 is.

long helm in the park

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#5 EJN

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Posted 16 October 2021 - 09:42 PM

Your telescope does not look like one of those long skinny refractors - which I dislike so much.

 

Joseph Von Fraunhofer is not happy with you.

 

CtB4HhtXgAA-MZL.jpg

 

default.jpg


Edited by EJN, 16 October 2021 - 09:46 PM.

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#6 vtornado

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Posted 16 October 2021 - 09:50 PM

Wow Ejn that is beautiful

 

If you can find a 80mm f/15 on craigs list, it is just as good as a $500 80mm ED.


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#7 Frisky

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Posted 16 October 2021 - 10:02 PM

Now we're talking'! In my book, these big refractors are the best scopes in the world!

 

Joe


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#8 Lentini

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Posted 16 October 2021 - 10:43 PM

Does anyone sell current model long f/ratio refractors? Love my (new to me) old 1973 f/15.3 65mm.


Edited by Lentini, 16 October 2021 - 10:47 PM.

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#9 Lentini

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Posted 16 October 2021 - 10:46 PM

Sorry, still trying to figure out why my photos are getting rotated. 

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#10 payner

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Posted 16 October 2021 - 10:48 PM

Joseph Von Fraunhofer is not happy with you.

Nor is Mr. Cooke.

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#11 Frisky

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Posted 16 October 2021 - 11:10 PM

MORE! MORE! MORE!


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#12 Jethro7

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Posted 16 October 2021 - 11:13 PM

Does anyone sell current model long f/ratio refractors? Love my (new to me) old 1973 f/15.3 65mm.

Hello Lentini, 

This is the only ones I know of.

https://www.firstlig...-refractor.html

https://www.firstlig...l-refractor.htm

Scopetech, has these two, I have no knowledge of the company or the quality of their products. The website says in stock.

 

HAPPY SKIES  KEEP LOOKING UP Jethro


Edited by Jethro7, 16 October 2021 - 11:19 PM.

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#13 Astrojensen

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Posted 17 October 2021 - 02:35 AM

Nor is Mr. Cooke.

Herr Zeiss would also like a word with you. 

 

gallery_55742_4772_556185.jpg

 

85/1576mm Zeiss A doublet apochromat on Zeiss 1b mount and Zeiss 3VS tripod. 

 

 

Clear skies!

Thomas, Denmark


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#14 lylver

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Posted 17 October 2021 - 04:16 AM

My Astro M80 is in repair so i put his sister, Dam's R82 that have same designed optic.

focuser is a 2" monster, optic is a textbook F'C' (Zeiss way to do), FH design (residual coma) and SA null around 546nm (photographic tuned), 0.98 strehl on e-ray. It is a generic : not planetary tuned.

sml_gallery_269196_17932_169417.jpg CZJ-space-optics.jpg

R82.JPG image.png

Image is more "white" & sharp with photographic RGGB bayer cameras. Less contrasty than the Vixen 80L on planetary target in visual but good for photographic pics.

More pics here : my gallery

I made some 63 to 90mm refractors and I continue do so. I don't sell here.


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#15 Marcus Roman

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Posted 17 October 2021 - 06:08 AM

Vixen 90L f14,4 about 1,3 mt long

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#16 Sasa

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Posted 17 October 2021 - 08:31 AM

Yes. F20 is.


One F/20 more

MHV3.jpg
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#17 Jeff B

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Posted 17 October 2021 - 09:01 AM

Alright!  Big Refractor Eye Candy!

 

First up the 6" & 7" jobbies:

 

6" F10 Istar ATM build

 

6" F10 Triplet

 

7" F9 AP Blue Tube Triplet

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Edited by Jeff B, 17 October 2021 - 09:02 AM.

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#18 Jeff B

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Posted 17 October 2021 - 09:05 AM

Now the 8" aperture

 

8" F9 achromat ATM build

 

8.7" F12 Achromat

 

8" F9 TEC 200ED

 

Jeff

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#19 Jeff B

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Posted 17 October 2021 - 09:07 AM

And now, to complete my thread-hogging, the Big Guy, 11" F12 D&G Achromat.

 

Jeff

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#20 kmparsons

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Posted 17 October 2021 - 09:39 AM

The best view of Saturn that I have had was through the 13" Fitz-Clark refractor of the Allegheny Observatory. My own modest collection of long (or longish) refractors has brought me much pleasure. Even the very inexpensive SV 80/9d ($350 new) provides views that wow me every time. It is my experience that longer refractors provide views with pinpoint stars and fields that are flat to the edge. For that, I am willing to put up with a (tiny) bit of false color. Long and skinny? I guess these refractors are the runway models of telescopes! 


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#21 Mike W

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Posted 17 October 2021 - 10:02 AM

https://www.cloudyni...goto-refractor/
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#22 Brian Carter

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Posted 17 October 2021 - 11:15 AM

I wish there were more long focus refractors, I don’t see the point in app these feast apo’s, neither visually nor photographically. You can get a 6” f/5 Newtonian that is cheaper, lighter weight, and wider field than any refractor… but you can’t find a 6” f/10 or f/12 newt that can hold a candle to an equivalent refractor.

I have a 5” f/7.5 apo that I love, but I wish it was slower, it would be even better.

Edited by Brian Carter, 17 October 2021 - 11:15 AM.

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#23 Bomber Bob

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Posted 17 October 2021 - 11:49 AM

1950s ATLAS 60mm F15...

 

Atlas 4436 Restore S52 - Carton AZ (RS FL).jpg

 

... made by KONICA -- yes, Konica.

 

Before I got my 1988 Takahashi FC-100, this 1950s Edmund 4" F15 was my favorite in the most useful aperture:

 

Edmund 4 - OTA Done (Mounted) S04.jpg


Edited by Bomber Bob, 17 October 2021 - 11:55 AM.

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#24 Frisky

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Posted 17 October 2021 - 12:03 PM

Pure greatness!

 

Joe



#25 Astrojensen

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Posted 17 October 2021 - 12:13 PM

4" f/11 ED on Vixen Saturn mount and Baader Hardwood tripod. Rock steady at 700x. Superb optics, will split Zeta Herculis cleanly at 239x. 

 

gallery_55742_4772_170135.jpg

 

 

80mm f/15 Vixen GP 80L. Lightweight, very fine optics. 

 

gallery_55742_4249_1407446610_22734.jpg

 

 

Clear skies!

Thomas, Denmark


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