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Equipment Discussions >> Refractors

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astroneil
Pooh-Bah
*****

Reged: 07/28/09

Loc: res publica caledoniae
Re: Astro-Tech 60mm f/7 ED triplet, first report. new [Re: jrbarnett]
      #5494191 - 10/29/12 08:02 AM

Dear Jim,

A most interesting shootout.

I have obtained similar results comparing an 80mm f/11 achromat to a high quality 76mm f/6.3 ED 'scope.

I doubt elevation has very much to do with your results, but of course, it's always good to test that.

Been doing some work on my own 60mm f/16.7 Skylight-Carton lately.
Details here;

http://neilenglish.net/further-studies-on-reverend-dawes-...

Regards,

Neil.


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Ed D
Carpal Tunnel
*****

Reged: 04/30/10

Loc: Sunny South Florida
Re: Astro-Tech 60mm f/7 ED triplet, first report. new [Re: astroneil]
      #5494793 - 10/29/12 02:59 PM

Jim,

Thanks for sharing your impressions on the two focusers. From what you found it seems either one would need to be set a bit firm to carry a heavy load, like a binoviewer. Also, the design of the Astro Tech R&P looks different from the ones I'm used to seeing.

Ed D


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Wes James
Postmaster
*****

Reged: 04/12/06

Re: Astro-Tech 60mm f/7 ED triplet, first report. new [Re: Ed D]
      #5510184 - 11/08/12 04:09 PM

Thanks for a great report, Jim.... good job!

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dscarpa
Post Laureate
*****

Reged: 03/15/08

Loc: San Diego Ca.
Re: Astro-Tech 60mm f/7 ED triplet, (w/ Pics now!!!). new [Re: jrbarnett]
      #5510281 - 11/08/12 05:18 PM

It's odd that AT has quality optics in their larger scopes but judging from your excellent report the AT-60 leaves something to be desired in that reguard. On the plus side of the ledger at least it isn't pink. David

Edited by dscarpa (11/08/12 05:22 PM)


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moynihan
Carpal Tunnel


Reged: 07/22/03

Loc: Lake Michigan Watershed
Re: Astro-Tech 60mm f/7 ED triplet, (w/ Pics now!!!). new [Re: dscarpa]
      #5562891 - 12/09/12 06:15 PM

Any final verdict/more insight on the optical quality in the AT60EDT?

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SKYGZR
scholastic sledgehammer
*****

Reged: 08/14/09

Loc: Planet Earth, Milky Way Galaxy...
Re: Astro-Tech 60mm f/7 ED triplet, (w/ Pics now!!!). new [Re: moynihan]
      #5563484 - 12/10/12 02:04 AM

I really like my AT72, yet haven't really used it for astro-visual as of yet (only asto-imaging). I have hooked up various combinations for imaging to test the train, yet this was under day light conditions on a distant tree. Perhaps someday I'll spend some eye piece time with it.

P.S. did use it with a solar filter to check out SOL a couple times.


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Mr Onions
Two Time International Photographical Competition Winner
*****

Reged: 04/14/07

Loc: Newcastle upon Tyne.
Re: Astro-Tech 60mm f/7 ED triplet, (w/ Pics now!!!). new [Re: SKYGZR]
      #5563522 - 12/10/12 03:42 AM

Wonderful read Jim.
My TV60 will be coming sometime at the start of the year,I'm sure it will go up against my Skylight { If the breeze round here ever dies down and that's not a given in the north east of England }
I walked two miles last night with my 80mm to observe Jupiter in honour of the great Patrick Moore,I only managed about 20 seconds through a 32mm plossl,I just bring that as a finder.
When is your LOMO due?


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jrbarnett
Eyepiece Hooligan
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Reged: 02/28/06

Loc: Petaluma, CA
Re: Astro-Tech 60mm f/7 ED triplet, (w/ Pics now!!!). new [Re: dscarpa]
      #5563926 - 12/10/12 10:50 AM

My AT72ED, too, is pretty middlin' in the optical quality department. FYI.

The AT60EDT requires a surprisingly long time (for a 60mm) to cool down. Image quality improves somewhat after about an hour (assuming a 20F temperature delta to be overcome), but even so, it's not in the same league as the AT111EDT I also have.



- Jim


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