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Astro-Tech 80EDL owners thread

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#526 wrvond

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Posted 28 August 2023 - 10:14 PM

I've done a bit of sleuthing and it looks like the AT80EDL is a bit of a late comer to the AT lineup. The earliest thread I can find about it was in April 2021:

 

https://www.cloudyni...67-new-at80edl/

 

I can't find any AT80EDLs with a black focuser, so I'm guessing they don't exist. I can't recall when the 80EDL was officially discontinued, but it feels like it only had about a 24 month run. From that perspective, low serial numbers don't seem to me to be out of line.

 

Here's a capture of the listing in December 2021 - the image shows the gray finish then too. 

 


Edited by wrvond, 28 August 2023 - 10:20 PM.

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#527 rnyboy

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Posted 28 August 2023 - 10:50 PM

Somewhere amongst all the threads here there is one from a guy who was told by Mike at Astronomics that he got the last of the 80EDLs.  I think he received it in late February or early March.  Serial Number is 00047.  It was about that time that another poster said it was now showing as "out off stock" and one poster at about the same date said that Mike from Astronomics said it was now discontinued.  Given your link above it appears to be pretty close to 23 months from start to end of the 80EDL sales.  I guess they averaged about two sold per month, but it appears to me that the vast majority of them were sold while they were on sale for $699.

 

In your link above, Astronomics Mike B. said about the 80EDL:  "Not everyone wants a triplet and they want as high a quality glass as they can get. Couple that with a faster cool down time and it works a bit better as a visual scope in that respect. People have liked the EDL line, so it was a natural extension. It might work, it might flop. The public will decide and the doublet cost to us is quite pricey so the cost is in line."

 

In the end it sounds like a lot of people went for the 80EDT with a case for only a few hundred dollars more.  The 80EDL, at least for Astronomics, appears to have wound up being a bit of a "flop" as far as profits go because it had to be discounted down to $700 to sell out and then it was discontinued.

 

I found the sales receipt for the original owner of my scope tucked in the instruction manual and he purchased it in early January of this year while on sale for $699 (Maybe a late Xmas present?).  He also bought the 0.8x focal reducer/flattener at the same time for $130.

 

Why the fascination with the serial numbers on here anyway?  Trying to figure out how many were made or what?


Edited by rnyboy, 29 August 2023 - 10:47 AM.

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#528 wrvond

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Posted 29 August 2023 - 04:51 AM

Yes.

Neither the EDs or EDTs are serialized so I think it’s natural to wonder why the EDLs are, and how many were made - or by extension- how many other people have this same scope.

We already know there is no correlation between the serial number and date of purchase- it’s quite random which only adds to the uncertainty.



#529 coopman

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Posted 29 August 2023 - 07:23 AM

I'll bet that they made 50 of them.


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#530 wrvond

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Posted 29 August 2023 - 07:25 AM

I'll bet that they made 50 of them.

That being the case, 100 years from now they should be quite collectible! wink.gif

 

Keep an eye out for my great-great grandkids to be listing mine on Cloudy Nights as "super rare", "hard to find" or similar. lol.gif


Edited by wrvond, 29 August 2023 - 07:27 AM.

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#531 Alan S

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Posted 29 August 2023 - 09:15 AM

Mine is SN 12, and I'm sure there were more than 11 sold before I purchased mine...
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#532 wrvond

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Posted 29 August 2023 - 09:46 AM

It just occurred to me that the EDLs are serialized because they come from the factory with a Zygo test for each one and there's got to be a way to tie those reports to individual units.

Don't know why I didn't think of that before...


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#533 Alan S

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Posted 29 August 2023 - 10:09 AM

Mine is SN 12, and I'm sure there were more than 11 sold before I purchased mine...

I just looked back and I purchased mine the 3rd week of December 2022 -

 

I do not think there is any relationship between purchase date and SN.  I would not expect them to be sold/shipped in SN order, as Astronomics likely gets a bulk shipment and starts sending them out as they are ordered...Take the box from the top of the stack, so to speak, and ship it out.


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#534 Oldfracguy

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Posted 29 August 2023 - 01:55 PM

I think the ATxxxEDL scopes that have guaranteed Strehl values of 0.95 or higher are serialized, since that represents an actual quantitative contractual requirement with these scopes that has to be traceable to some measurements.

.



#535 Mordakyblu

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Posted 08 September 2023 - 05:49 PM

When I used my 80EDL on Venus I saw defraction rings around the image. Anyone else see this?



#536 Oldfracguy

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Posted 08 September 2023 - 06:40 PM

When I used my 80EDL on Venus I saw defraction rings around the image. Anyone else see this?

What magnification were you using (or what eyepiece and/or eyepiece-Barlow combination) when you saw diffraction rings around Venus in your AT80EDL? 

 

Also, I'm assuming you were looking at Venus recently when it is in the Eastern sky before sunrise.



#537 Jeepers

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Posted 12 September 2023 - 08:49 PM

Obviously I'm late to this party as I see it is on page 22 of this thread already! I too just scored a purchase of an "as new" copy of this scope. Owner purchased and took it out of the packaging to give it a quick look thru and decided he needed a bigger version. 

The scope I am getting is serial #000007.

 

Looking forward to owning this scope. I am stepping up from my older AT72Ed and it will be a compliment to my 8"SCT.

 

Personally I liked what I have been reading about this model and I especially like the look and craftsmanship of this one too. I wish that they had come with a case for them though.

 

Do the optical reports typically come with these?


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#538 wrvond

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Posted 12 September 2023 - 09:20 PM

Obviously I'm late to this party as I see it is on page 22 of this thread already! I too just scored a purchase of an "as new" copy of this scope. Owner purchased and took it out of the packaging to give it a quick look thru and decided he needed a bigger version. 

The scope I am getting is serial #000007.

 

Looking forward to owning this scope. I am stepping up from my older AT72Ed and it will be a compliment to my 8"SCT.

 

Personally I liked what I have been reading about this model and I especially like the look and craftsmanship of this one too. I wish that they had come with a case for them though.

 

Do the optical reports typically come with these?

Congratulations! You are getting a really great scope for sure.

The test reports are not issued with them, no. Astronomics is keeping them on file, so far as I know. I've wondered a time or two how long they intend to keep them now that the scope is discontinued. 



#539 Jeepers

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Posted 12 September 2023 - 10:27 PM

Not that I have the technical knowledge to even begin to understand the info in those reports it does strike me as odd that they wouldn't have stayed with and shipped with each scope.

As it appears, maybe with only 50 of these scopes produced that there would be a way to make these 50 reports available to any current owner who might now want them via a downloadable link. 

Maybe it doesn't really matter to most folks.

I have enjoyed reading this whole thread though!

 

Hope to get out and try mine by the weekend.smile.gif



#540 wrvond

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Posted 12 September 2023 - 10:49 PM

Not that I have the technical knowledge to even begin to understand the info in those reports it does strike me as odd that they wouldn't have stayed with and shipped with each scope.

As it appears, maybe with only 50 of these scopes produced that there would be a way to make these 50 reports available to any current owner who might now want them via a downloadable link. 

Maybe it doesn't really matter to most folks.

I have enjoyed reading this whole thread though!

 

Hope to get out and try mine by the weekend.smile.gif

I believe the reason the reports were not included was to prevent “cherry picking” - the practice of repeatedly buying and returning scopes in order to obtain the best possible results. The reality is we can’t visually detect a difference between 0.95 and 0.98 Strehl. I could get mine tested and file a warranty claim if it failed to meet the guaranteed minimum but since I’m very happy with how it performs having the test data would only be good for bragging rights.



#541 Jeepers

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Posted 13 September 2023 - 08:11 AM

Agreed, and since each scope was tested I would presume each met or passed the standard or it would not have been shipped out. Or at least that's what I would like to think!
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#542 rnyboy

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Posted 16 September 2023 - 10:49 AM

Finally, the first light for the new-to-me AT80EDL with the 0.8x reducer/flattener last night.  Here's an image of my setup behind the house and here's a link to the EAA NGC7380 (The Wizard Nebula) posting I just made in the EAA Forum...  https://www.cloudyni...0#entry12946025

 

Below the scope setup image is a PhotoShoped post-processed version of The Wizard Nebula.  Not much difference from the image posted in the EAA link.

 

Scope setup behind house in backyard...

 

W72Qvp9.jpg

 

NGC7380, The Wizard Nebula, quickly post-processed in PhotoShop...

 

xWhZzIs.jpg


Edited by rnyboy, 16 September 2023 - 10:13 PM.

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#543 wrvond

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Posted 16 September 2023 - 02:14 PM

Sounds like you are pleased with your scope. waytogo.gif

 

I spent a bit of time observing the Sun using a Herschel wedge over the past couple of days- though not for the first time. The seeing was fantastic and though the occasional ball of fluff blocked my view it still proved to be a great way to spend part of the day.


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#544 Cpk133

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Posted 16 September 2023 - 05:26 PM

When I used my 80EDL on Venus I saw defraction rings around the image. Anyone else see this?

Yes with an 80ed



#545 CHASLX200

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Posted 16 September 2023 - 05:30 PM

I don't see how anyone can see rings around a planet.



#546 Oldfracguy

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Posted 16 September 2023 - 09:32 PM

You will see diffraction rings around any bright target if you use a magnification that is high enough, and/or if you defocus slightly.  If you see diffraction rings when the scope is as well-focused as you can get, it's probably due to the magnification being high enough to where you are nearing the Airy disk.  I have a William Optics Zenithstar 81, which is optically the same scope as the AT80EDL.  I can see diffraction rings start to become visible on bright stars, on Jupiter and Venus, when the magnification hits 240x, or when the Exit Pupil gets below about 0.4 mm.


Edited by Oldfracguy, 16 September 2023 - 09:32 PM.


#547 rnyboy

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Posted 16 September 2023 - 10:03 PM

Yes, happy with the "new" scope.smile.gif  Now if I can only get the AVX to auto guide reasonably well.  It starts out OK in PHD2 but then the DEC starts to go wonky.  When the DEC does go off the rails the observed behavior for the DEC axis in the PHD2 guiding graph has been different all three times I've used it so far.  It could be due to several issues and sorting it out becomes a chore when I'd rather be imaging.  The 80EDL imaging setup weighs only about 12 lbs, so it shouldn't be taxing the mount much at all.  


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#548 CHASLX200

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Posted 17 September 2023 - 05:34 AM

You will see diffraction rings around any bright target if you use a magnification that is high enough, and/or if you defocus slightly.  If you see diffraction rings when the scope is as well-focused as you can get, it's probably due to the magnification being high enough to where you are nearing the Airy disk.  I have a William Optics Zenithstar 81, which is optically the same scope as the AT80EDL.  I can see diffraction rings start to become visible on bright stars, on Jupiter and Venus, when the magnification hits 240x, or when the Exit Pupil gets below about 0.4 mm.

Well i have used 600x on Venus and never saw rings. I just see a huge disk taking up the whole FOV in a 4" scope.  



#549 rnyboy

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Posted 09 October 2023 - 10:57 AM

Knock, knock...  Looks like nobodies been home here recently.

 

I haven't been out with my "new" AT80EDL much yet, but since I think I'm among the few who use it for imaging instead of visual work, for whatever reasons, I thought I'd add a link here to a posting I just made to the EAA sub-forum.  The images I posted there aren't "stellar", since I'm learning how to auto guide the scope with an AVX mount, but I've managed to capture a couple of objects in between the testing things out and what the cloud-gods would allow.

 

Link to EAA post:   https://www.cloudyni.../#entry12992490


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#550 RCLARK28

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Posted 09 October 2023 - 11:08 AM

Knock, knock...  Looks like nobodies been home here recently.

 

I haven't been out with my "new" AT80EDL much yet, but since I think I'm among the few who use it for imaging instead of visual work, for whatever reasons, I thought I'd add a link here to a posting I just made to the EAA sub-forum.  The images I posted there aren't "stellar", since I'm learning how to auto guide the scope with an AVX mount, but I've managed to capture a couple of objects in between the testing things out and what the cloud-gods would allow.

 

Link to EAA post:   https://www.cloudyni.../#entry12992490

Good photos of your session(s). These scopes provide a good platform and are quality productions. Our neighbor unboxed her AT80EDL over x3 months ago and is very happy with it. My AT80ED has been a joy for me and getting really good results.

*Good luck with your tracking and auto guiding.

Clear skies!




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