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Equipment Discussions >> Refractors

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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
80mm f/6 FPL-53 doublets in the US?
      #6180316 - 11/07/13 02:04 AM

Looking for something with ~500mm FL. Are there any, anymore? I'd rather not import one. The Orion EON was discontinued and so far I can't find the SW Equinox here. I see that Orion recently put up a 110mm F/6 FPL-51 under the EON name ($1300), but I'd like the better glass, and something smaller and easier on the wallet. What are my options?

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T1R2
Pooh-Bah


Reged: 06/11/13

Loc: NeverWhere
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6180325 - 11/07/13 02:36 AM

IDK, but Stellarvue makes a 80ED doublet for 499$ for stock focuser and 699 for their 2 speed, they don't say what glass it is, but these are excellent scopes. and of course they have a 110ED doublet also for 995$ or 1295$

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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: T1R2]
      #6180329 - 11/07/13 02:43 AM

It's an f/7. If I were willing to accept that ratio, then probably I'd just go with the SW Pro f/7.5 FPL-53 doublet on sale for $579 right now.

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nicknacknock
professor emeritus
*****

Reged: 02/20/12

Loc: In a galaxy far far away...
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6180371 - 11/07/13 05:19 AM

At f6 correction for CA won't be perfect with a doublet, hence most f6 80mm are triplets.

Stellarvue has a triplet 80mm which I bought and had first light a couple of weeks ago, but you'd be paying top dollar for 80mm. Having used it (only two times so far) I can attest to excellent correction for color, fantastic pinpoint stars, but also the obligatory field curvature when you use eyepieces that yield low magnification / wide field of views.

http://tinyurl.com/namrrz5

With the 31mm Nagler, I get 5 degrees TFOV and FC is not an issue when you settle on a target. Try to pan around the skies and you get a feeling of swimming underwater. Lasts for a second, but it's there.

Orion has the ED80 CF Triplet at a more "reasonable" price and they state that it has a FLP-53 element. There was a review in one of the astronomy magazines a year ago and it was positively glowing, but I don't place much faith in such reviews (prefer real feedback that comes from multiple CN users).

http://tinyurl.com/pkw432e

CS,

Nick


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Jon Isaacs
Postmaster
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Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: T1R2]
      #6180407 - 11/07/13 06:38 AM

Quote:

IDK, but Stellarvue makes a 80ED doublet for 499$ for stock focuser and 699 for their 2 speed, they don't say what glass it is, but these are excellent scopes. and of course they have a 110ED doublet also for 995$ or 1295$




You can pretty much figure if they don't mention FPL-53 it's FPL-51 or something very similar.

Jon


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jon Isaacs]
      #6180430 - 11/07/13 07:11 AM

The celetron onyx fits your bill. Sent you a pm about one.

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dbowlin
sage
*****

Reged: 09/03/09

Loc: Littleton, Colorado
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: jag767]
      #6180432 - 11/07/13 07:15 AM

WO GTF 81 @ Agenastro.com . It is a good one. I like mine.
Dale

Edited by dbowlin (11/07/13 07:17 AM)


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nicknacknock
professor emeritus
*****

Reged: 02/20/12

Loc: In a galaxy far far away...
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: dbowlin]
      #6180433 - 11/07/13 07:18 AM

Nice review of the Onyx in Astronomy.com

http://tinyurl.com/n5ng7h9


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nicknacknock
professor emeritus
*****

Reged: 02/20/12

Loc: In a galaxy far far away...
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: nicknacknock]
      #6180436 - 11/07/13 07:19 AM

And one for the WO GTF

http://tinyurl.com/oyzujgo


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RTLR 12
Post Laureate
*****

Reged: 12/04/08

Loc: The Great Pacific NorthWest
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: nicknacknock]
      #6180444 - 11/07/13 07:29 AM

My Onyx 80 EDF @ f/6.25 has less CA than my Stellarvue SV115T20 APO with no name glass.

Stan


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nicknacknock
professor emeritus
*****

Reged: 02/20/12

Loc: In a galaxy far far away...
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: RTLR 12]
      #6180449 - 11/07/13 07:34 AM

Quote:

My Onyx 80 EDF @ f/6.25 has less CA than my Stellarvue SV115T20 APO with no name glass.

Stan




Stan, I thought those SV115 were advertised as "superplanetary blah blah" and as true APOs. They suffer from CA???

Please share any insight you have as it is a scope I entertain on and off to get...


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: nicknacknock]
      #6180471 - 11/07/13 08:04 AM

Isnt the gt81 a triplet not doublet?

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RTLR 12
Post Laureate
*****

Reged: 12/04/08

Loc: The Great Pacific NorthWest
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: nicknacknock]
      #6180472 - 11/07/13 08:05 AM

Nicos,

I'll send you a PM.

Stan


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BillP
Postmaster
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Reged: 11/26/06

Loc: Vienna, VA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: jag767]
      #6180572 - 11/07/13 09:15 AM

Quote:

The celetron onyx fits your bill. Sent you a pm about one.




Very true...this is one wonderful scope. It is so very very hard to coax any CA out of it also, even on brightest objects. It is a surprising performer too, even at highest magnifications. It easily kept pace all the way into planetary magnifications with an 80mm premium triplet super APO I had too. Only oddities about it are that the dew shield sometimes does not stay extended when pointed at the zenith and if you use a 2" diagonal I have come across a few eyepieces that do not come to focus. I eventually sold my $1000+ premium 80 and kept the Onyx and have NEVER looked back


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: BillP]
      #6180605 - 11/07/13 09:30 AM

Quote:

Quote:

The celetron onyx fits your bill. Sent you a pm about one.




Very true...this is one wonderfule scope. It is so very very hard to coax any CA out of it also, even on brightest objects. It is a surprising performer too, even at highest magnifications. It easily kept pace all the way into planetary magnifications with an 80mm premium triplet super APO I had too. Only oddities about it are that the dew shield sometimes does not stay extended when pointed at the zenith and if you use a 2" diagonal I have come across a few eyepieces that do not come to focus. I eventually sold my $1000+ premium 80 and kept the Onyx and have NEVER looked back




Couldn't agree more. The only reason I am letting mine go is I use my ed100 when I'm home or going local, and I like my 65mm for travel. If I was into astrophotography then it would have a use for me but as it is I don't really use it. I'd like to see it get a home where someone will appreciate it. Mines also custom painted gloss black and blue metallic


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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: jag767]
      #6180689 - 11/07/13 10:13 AM

The Onyx is discontinued, like the EON. These little Synta scopes get glowing reviews every where I look. Why in the heck did they discontinue them in the US?

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nicknacknock
professor emeritus
*****

Reged: 02/20/12

Loc: In a galaxy far far away...
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: jag767]
      #6180691 - 11/07/13 10:14 AM

Quote:


Couldn't agree more. The only reason I am letting mine go is I use my ed100 when I'm home or going local, and I like my 65mm for travel. If I was into astrophotography then it would have a use for me but as it is I don't really use it. I'd like to see it get a home where someone will appreciate it. Mines also custom painted gloss black and blue metallic




Just checked your ad and that's a great paint job!


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: nicknacknock]
      #6180703 - 11/07/13 10:20 AM Attachment (19 downloads)

Quote:

Quote:


Couldn't agree more. The only reason I am letting mine go is I use my ed100 when I'm home or going local, and I like my 65mm for travel. If I was into astrophotography then it would have a use for me but as it is I don't really use it. I'd like to see it get a home where someone will appreciate it. Mines also custom painted gloss black and blue metallic




Just checked your ad and that's a great paint job!




Thanks! there's only one tiny imperfection in the whole thing and its covered by the tube rings.You should see it in person the paint is so much more vibrant the pictures really dont do it justice. My latest addiction has been custom painting refractors. Gives them such a unique look and higher quality finish!


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: jag767]
      #6180707 - 11/07/13 10:21 AM Attachment (22 downloads)

One more

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Jim7728
Postmaster
*****

Reged: 04/10/05

Loc: Stoop Landing Observatory, NYC
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6180796 - 11/07/13 11:11 AM

Here you go.

http://www.telescopes.com/telescopes/optical-tubes/olivon80mmedapof625doublet...


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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jim7728]
      #6180807 - 11/07/13 11:23 AM

Thanks, had not seen this one. However, it's the same price as the Orion FPL-53 triplet, so hard for me to justify (same comment with the WO).

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FirstSightModerator
Duke of Deneb
*****

Reged: 12/26/05

Loc: Raleigh, NC
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jim7728]
      #6180823 - 11/07/13 11:30 AM

If your requirements are flexible enough to go up to 90mm, another gem is the William Optics Megrez-90 doublet, which uses FPL-53 glass and is f/6.2. Although like the Onyx it too is regrettably discontinued, Megrez-90s periodically come up for sale used on A...a...you knowwhereImean. The scope is also reasonably lightweight for 90mm, coming in just over 7 lbs.

The only reason I don't use my Megrez-90 as much as I once did is that I got a Televue NP-101 - but just recently I used the Megrez 90 frequently over the nearly three weeks my NP-101 was off at Televue for servicing, and was reminded just how good the optics of the Megrez-90 really are. Yeah, bottom line is that my particular Megrez-90 is unlikely to ever go up for sale (too valuable as a backup for situations or times when I can't or don't want to bring the NP-101 along) but with a bit of patience, you can probably still find one for sale (ditto for the Onyx).

Edited by FirstSight (11/07/13 02:04 PM)


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rockethead26
Carpal Tunnel
*****

Reged: 10/21/09

Loc: Arizona, USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jim7728]
      #6180961 - 11/07/13 12:35 PM

Quote:

Here you go.

http://www.telescopes.com/telescopes/optical-tubes/olivon80mmedapof625doublet...




Looks like the same scope distributed by TS in Europe. It's a nice looking scope.


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jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6180985 - 11/07/13 12:45 PM

What about the AWB Celestron 80ED deal?

http://store.astronomerswithoutborders.org/index.php?main_page=product_info&a...

At f/7.5 (a little longer than you asked for) it will have better color correction than at f/6 and it is FPL-53 as you requested.

- Jim


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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: jrbarnett]
      #6181200 - 11/07/13 02:32 PM

Quote:

At f/7.5 (a little longer than you asked for) it will have better color correction than at f/6 and it is FPL-53 as you requested.




I knew about this scope but did not realize it had the FPL-53 element. At that price, compromising on focal length could be an option since I could always get the 0.85x reducer/flattener that is (was?) available for these 80mm f/7.5 doublets. But by the time you do that and add in a good focuser you are back up around the price of one of the more deluxe f/6 scopes...there is no free lunch it seems.

One issue I have is that I already made an investment in the Orion flattener for short refractors (the one that doesn't change the focal length) in anticipation of finding an f/6 'fractor for AP. Maybe the simple answer is that I just need to be more patient in the used market. One of the SW Equinox came up on Amart last week but I was too slow on the trigger. In fact I was 0-3 on Amart items last week, which was really annoying


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hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jim7728]
      #6181211 - 11/07/13 02:40 PM Attachment (17 downloads)

No CA as far as I can tell on the 80MM EON. Never believe anyone that hasn't used the scope talk about it.

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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: hfjacinto]
      #6181222 - 11/07/13 02:45 PM

I think you should sell me yours. That 120 needs to be used more often.

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hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6181228 - 11/07/13 02:49 PM Attachment (16 downloads)

Jarrod, its used enough

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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: hfjacinto]
      #6181233 - 11/07/13 02:53 PM

You are killing me right now

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hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6181250 - 11/07/13 03:07 PM Attachment (20 downloads)

Jarrod,

I keep telling people that the EON is the best scope. Its so good random strangers walk up to look through it even at sunset.


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hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: hfjacinto]
      #6181251 - 11/07/13 03:09 PM Attachment (19 downloads)

But Jarrod, true happiness is 2 EONS.

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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6181267 - 11/07/13 03:16 PM

Quote:

Quote:

At f/7.5 (a little longer than you asked for) it will have better color correction than at f/6 and it is FPL-53 as you requested.




I knew about this scope but did not realize it had the FPL-53 element. At that price, compromising on focal length could be an option since I could always get the 0.85x reducer/flattener that is (was?) available for these 80mm f/7.5 doublets. But by the time you do that and add in a good focuser you are back up around the price of one of the more deluxe f/6 scopes...there is no free lunch it seems.

One issue I have is that I already made an investment in the Orion flattener for short refractors (the one that doesn't change the focal length) in anticipation of finding an f/6 'fractor for AP. Maybe the simple answer is that I just need to be more patient in the used market. One of the SW Equinox came up on Amart last week but I was too slow on the trigger. In fact I was 0-3 on Amart items last week, which was really annoying




If you don't need the F/6 focal ratio for visual, the C80ED seems like a good way to go...

Jon


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Wmacky
Carpal Tunnel
*****

Reged: 11/24/07

Loc: Florida
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: hfjacinto]
      #6181298 - 11/07/13 03:31 PM

Quote:

No CA as far as I can tell on the 80MM EON. Never believe anyone that hasn't used the scope talk about it.




Can't wait to start getting pics like that with my EON 80!


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hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Wmacky]
      #6181320 - 11/07/13 03:43 PM Attachment (9 downloads)

Jarrod,

One thing, you will need a field flatner for the F6.25 scopes. Especially with a larger chip. This was with a 25 by 17MM chip and as you can see even with the field flatner, the extreme edge of field has a few oblong stars, without a field flatner there is noticeable star elongation.

I use this one:

http://www.hotechusa.com/category-s/4.htm


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Jarrod
Pooh-Bah
*****

Reged: 01/20/13

Loc: SE USA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: hfjacinto]
      #6181327 - 11/07/13 03:46 PM

Thanks. I already have the Orion flattener for short refractors. Talk about putting the cart before the horse....

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Binojunky
Carpal Tunnel
*****

Reged: 12/25/10

Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Jarrod]
      #6181470 - 11/07/13 05:03 PM

The Celestron from AWB is a fine buy, highly recomended,DA.

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dbowlin
sage
*****

Reged: 09/03/09

Loc: Littleton, Colorado
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: Binojunky]
      #6181923 - 11/07/13 10:03 PM

Black Friday will be her soon. Members will report good bargains. It could be big fun?
Dale


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jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: 80mm f/6 FPL-53 doublets in the US? new [Re: dbowlin]
      #6181933 - 11/07/13 10:12 PM

*That* is an excellent point.

- Jim


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