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If you could own only one scope, and a refractor ..... ?

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140 replies to this topic

#126 Steve Allison

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Posted 11 February 2020 - 06:26 AM

I am glad to see an achromat chosen. They can be excellent performers for visual if one is not overly neurotic about a little color.

 

I have a couple of fluorite refractors in 3 and 4 inch sizes that are optically superb, but I seem to derive the most pleasure from my featherweight Brandon 3 inch, f/15 alt-az achromatic refractor. It is one hand portable and throws up beautifully sharp, high contrast images. The wide air-space design of the objective lens displays about half the color of a typical Fraunhofer doublet.

 

When my back is acting up, it is often the only telescope I can physically set up and use.

 

Sometimes I wonder if I shouldn't just keep the Brandon and sell everything else. So maybe it is the one...


Edited by Steve Allison, 11 February 2020 - 06:31 AM.

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#127 F.Meiresonne

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Posted 11 February 2020 - 06:37 AM

Dunno…

 

Personally I would not go for any achromat anymore.

 

From what I seen from my F/7 FPL-53 doublet I would not settle for less.

 

It is short, colorfree , and not heavy.


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#128 Don W

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Posted 11 February 2020 - 11:47 AM

To me, the best use of a refractor is in viewing the planets, moon etc. High resolution, color free images. An achromat just does not cut it.


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#129 t.r.

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Posted 11 February 2020 - 12:26 PM

To me, the best use of a refractor is in viewing the planets, moon etc. High resolution, color free images. An achromat just does not cut it.

Sadly, I Too wish it could but once you have seen apo contrast, it’s hard to go back.
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#130 bobhen

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Posted 11 February 2020 - 12:30 PM

When I was younger I owned an AP 155 F7 triplet for 17-years and as a single refractor solution it’s hard to do better than that. But as I got older, and having to set up each night, it was time to look at more portable refractors in the 100 to 130 mm size. So ten years ago I selected a Takahashi TSA 120 to be my main refractor. I would make the exact same choice today, which I suppose says a lot about the Tak TSA 120.

 

13-pound OTA
Extremely sharp optic
Does everything from solar to lunar/planetary to deep sky and even has plenty of focus travel for my image intensifier
Rides perfectly on many of the available lighter GE and alt/az mounts

If I had an observatory (and had to use my money to pay for it) then an APM LZOS 175 or TEC 180 would do nicely.

 

Bob

 

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#131 Phillip Creed

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Posted 11 February 2020 - 02:03 PM

I saw my response in this thread from three years ago.  If I had to narrow everything down to a "one scope does it all" refractor, I figured at the time the logical answer was the Televue NP-127.   I was strictly a visual observer back then.

Since then, I've taken up astrophotography.  And given that...

...I'd still go with the same answer.

Not that I could afford an NP127, mind you.  A used, NON-IS version of the NP101 is a stretch for my budget as is.  But one can always dream.

Clear Skies,

Phil


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#132 The Luckster

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Posted 11 February 2020 - 04:06 PM

I will only base my response on what I have used;

 

My AT72EDII.

 

It's wide-field, it handles high mags very well, it's light weight, it controls CA very well and I can plop in just about any reasonable tripod.

 

And as an added bonus, if I can only have one refractor, I will add that I can only have one mount, diagonal and ocular (I'll also toss in a Barlow.).  So the rig is as follows:

 

AT72EDII -- Manfrotto XPROB055 -- Innorel Pan Head -- GSO 1.25" Dielectric diagonal -- TV DeLite 18.2mm -- TV 2x.

 

That's the "if I could only have one kit" for me...

 

CSS

 

jason

 


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#133 Kunama

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Posted 11 February 2020 - 05:01 PM

I find the very notion of " one scope " to be blasphemous at best gramps.gif  ...... but to go along with Rob's thread.....

I always thought my answer to one of these questions would be the TOA130NFB which is simply superb in every way bow.gif  ....

 

but then I bought the TMB-LZOS 152mm F7.9 LW II and paired it with the Baader 2" BBHS Sitall diagonal and got to use it for a few hours drool5.gif  ...... I now have my lifetime keeper.... (and it weighs the same as the TOA130NFB.)


Edited by Kunama, 12 February 2020 - 03:23 PM.

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#134 ltha

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Posted 11 February 2020 - 07:39 PM

Takahashi FS-152 or FC-125.



#135 BigC

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Posted 11 February 2020 - 08:16 PM

Keeping somewhat realistic,if all my scopes were sold then a 6 inch triplet APO..on an adequate goto(usable manually) mount .

 

But really like to cheat with a second (small )scope for when back pain is the limiting factor.Barska 80 triplet would suffice.


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#136 stevew

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Posted 11 February 2020 - 09:20 PM

To me, the best use of a refractor is in viewing the planets, moon etc. High resolution, color free images. An achromat just does not cut it.

The real problem is that there are not a lot of high quality achromats available these days. Most are mass produced fast F-ratio scopes from China.

In the past I have owned a couple of excellent Japanese achromats, and my D&G gives wonderful images.


Edited by stevew, 12 February 2020 - 02:22 AM.

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#137 Chris Cook

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Posted 12 February 2020 - 10:48 AM

A-P 206 EDF


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#138 k5apl

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Posted 12 February 2020 - 01:57 PM

I already own it:  AP 130 edf GT.   I transport it on airliners to good sky locations.

Wes


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#139 punk35

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Posted 12 February 2020 - 08:32 PM

If I am never able to upgrade my refractor, I’ll be happy with my AT102ED. It’s a much nicer scope than I thought I’d ever have for a casual hobby. I’d be happy just to look through some of the examples provided above.


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#140 mtminnesota

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Posted 12 February 2020 - 09:02 PM

If I couldn't have a Tak FET-300, a TOA-150 would do :)


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#141 balu01

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Posted 13 February 2020 - 03:56 AM

TOA 130 as long as I can comfortably handle it




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