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Equipment Discussions >> Refractors

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gustavo_sanchez
sage


Reged: 12/30/10

Loc: Puerto Rico, US
Blue William Optics GT81 arrived! (FIRST LIGHT!)
      #5688021 - 02/18/13 11:00 PM

I expect to receive very soon my new limited edition Blue GT81 from Agena Astro. I looks like I got the last one, since after I ordered mine it appeared as out of stock. It includes the finder rings, a 2.5" rack and pinion focuser and the field flattener.

However, looking at the forums, it seems that not a lot of people talk about this scope model. Is there a problem with it or any issue related to its performance?

Thanks!

Edited by gustavo_sanchez (02/20/13 10:04 PM)


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gustavo_sanchez
sage


Reged: 12/30/10

Loc: Puerto Rico, US
Re: Blue William Optics GT81 almost here! new [Re: gustavo_sanchez]
      #5688612 - 02/19/13 10:24 AM

Well, it arrived!

No GT81 owners around? :-/


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zjc26138
Loved By All
*****

Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: Blue William Optics GT81 almost here! new [Re: gustavo_sanchez]
      #5688639 - 02/19/13 10:46 AM

Congrats on the new scope! I don't think there are many owners of this scope yet.

By the way. We want pictures.


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NHRob
Post Laureate
*****

Reged: 08/27/04

Loc: New Hampshire
Re: Blue William Optics GT81 almost here! new [Re: zjc26138]
      #5688966 - 02/19/13 02:00 PM

Pictures!!

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gustavo_sanchez
sage


Reged: 12/30/10

Loc: Puerto Rico, US
Re: Blue William Optics GT81 almost here! new [Re: NHRob]
      #5689007 - 02/19/13 02:31 PM

I'm still at work! I can't wait to go home and open the box!!!!

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Scott BeithAdministrator
SRF
*****

Reged: 11/26/03

Loc: Frederick, MD
Re: Blue William Optics GT81 almost here! new [Re: gustavo_sanchez]
      #5689129 - 02/19/13 03:46 PM

Here you go...

link


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SteveG
Post Laureate
*****

Reged: 09/27/06

Loc: Seattle, WA
Re: Blue William Optics GT81 almost here! new [Re: Scott Beith]
      #5689166 - 02/19/13 04:05 PM

I don't think that's it, but perhaps this one:
http://www.williamoptics.com/wo_shop/catalog/product_info.php?products_id=587


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FTLAUDSKY
member
*****

Reged: 01/21/13

Re: Blue William Optics GT81 almost here! new [Re: SteveG]
      #5689194 - 02/19/13 04:16 PM Attachment (100 downloads)

Great scope. The optics are crystal clear. Your going to enjoy it. I know I am!!! I went up to 203X and could see Jupiter and a few bands pretty clear. The scope is a work of art. Love the blue anodized aluminum. Here is a picture of my first night. I was in heaven....

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FTLAUDSKY
member
*****

Reged: 01/21/13

Re: Blue William Optics GT81 almost here! new [Re: FTLAUDSKY]
      #5689206 - 02/19/13 04:21 PM Attachment (83 downloads)

Here is another shot. The mount is an AVX

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zjc26138
Loved By All
*****

Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: Blue William Optics GT81 almost here! new [Re: FTLAUDSKY]
      #5689279 - 02/19/13 05:01 PM

That's a beautiful scope!

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DRodrigues
super member


Reged: 08/08/11

Re: Blue William Optics GT81 almost here! new [Re: FTLAUDSKY]
      #5689287 - 02/19/13 05:04 PM

FTLAUDSKY,
Nice to know that it perform well optically. I thought I read somewhere that this 5 lens models had also problems with loosing collimation as the Skywatcher 100ED...


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turtledude1
member
*****

Reged: 10/08/08

Loc: SW Fla.& SW. NM
Re: Blue William Optics GT81 almost here! new [Re: FTLAUDSKY]
      #5689315 - 02/19/13 05:16 PM

I just got one of the new WO 102GTF's there's only a small handful of us around. Mine was one of the first delivered and the build quality is extremely good. I like the R&P focuser it's a vast improvement over the
Crayford on my Zenithstar 80FD.

I haven't had it out for first light yet and I have no idea when the weather Gods will allow it. I've had one clear weekend night in two years so I guess I'm not going to rush it. Anyway I hope you enjoy your new 81


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FTLAUDSKY
member
*****

Reged: 01/21/13

Re: Blue William Optics GT81 almost here! new [Re: turtledude1]
      #5689401 - 02/19/13 06:04 PM

The GT81 is a triplet. The GTF is the new 5 element design.

Here is a brief overview of the scope by me (newbie)- my first scope; now have two (thanks craiglist), and working on getting a third already in a couple weeks.. :-)

1. Length - scope is small looking to me (487MM) but semi fast at F5.9 (I call him stubby)
2. Weight - around 8 lbs and feels like a tank (solid)
3. Focuser - new R&P design doesn't slip or move
4. Looks - I love the blue aluminum and the white is textured
5. Mount - comes with the dovetail foot - I attached it to a plate and is super solid. They increased the distance between the 1/4 20 mounting holes - Rings will also work
6. Glass - triplet with FPL53 what else is there to say - I went looking for CA and found none - sharp focus - Moon has no hint of CA. I am also sensitive to it so if it was there I would have seen it.
7. Collmination - perfect (had a QC signature on the box)
8. Field Flattner - works great with my DSLR

In the end I am super happy with my purchase. If I could do it over again I would definitely buy it again without hesitation. My friend came over and wants to buy it from me after seeing Jupiter for the first time. We shall see. I am trying to get him into the hobby so I can share my new found passion. There are a ton of manufactures selling quality scopes. Choosing one is a difficult decision. Atleast it was for me. If you are looking for a quality 80 APO the WO GT81 should be on your list.

OP - Congrads on a beautiful scope and look forward to your first light and experiences

By the way - saw my first satellite the other night - was cool seeing an object (smaller dot) going in the opposite direction and had no idea how fast they move. Pure luck that I saw it.

Edited by FTLAUDSKY (02/19/13 06:09 PM)


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gustavo_sanchez
sage


Reged: 12/30/10

Loc: Puerto Rico, US
Re: Blue William Optics GT81 almost here! new [Re: FTLAUDSKY]
      #5689536 - 02/19/13 07:23 PM Attachment (70 downloads)

I received the scope, and have to admit, it's a bittersweet feeling... The scope, overall, feels great, it's like a little tank. However, after inspecting it, I found that it came with very dusty optics in both sides of the objective... What a bummer... I sent a message to Agena Astro to see how this can be sorted out... I love the scope but the dust in the objective is pushing me to return it, even if I can't get another of the same model...

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wrg
member


Reged: 02/16/13

Re: Blue William Optics GT81 almost here! new [Re: gustavo_sanchez]
      #5689600 - 02/19/13 07:55 PM

turtledude1, Hi, I'm really thnking of getting a W/O gtf 102, I already own a zenithstar 70 ED dobulet f/6 2012 serial # 25 great little scope, I'm so close to ordering the 102,thought I must say I did'nt like hearing about the dust on the inside of the objective lens of Gustavo's GT81, although i never had a problem with W/O I have read some things in the past few years I did'nt really want to hear.If anyone else owns a GTF 102 I'd like to hear anything good or bad about it or any other recently bought W/O OTA's

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timmbottoni
Carpal Tunnel


Reged: 08/25/05

Loc: W Chicago suburbs, IL USA
Re: Blue William Optics GT81 almost here! new [Re: wrg]
      #5689702 - 02/19/13 08:52 PM

I just ordered a GTF102 - I will have it next week so I will let you know how it is once I get it.

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wrg
member


Reged: 02/16/13

Re: timmbottoni new [Re: timmbottoni]
      #5689735 - 02/19/13 09:14 PM

I'm so close to pulling the trigger!

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orlyandico
Post Laureate
*****

Reged: 08/10/09

Loc: Singapore
Re: timmbottoni new [Re: wrg]
      #5689805 - 02/19/13 09:53 PM

here's a photo through a GTF 81.

http://www.singastro.org/forum2/viewtopic.php?f=7&t=11748

the stars aren't round due to imperfect tracking but you can see that they are small to the edges of the sensor (I believe the camera is a QSI 583).

this is a much better result than my Z70 + WO flattener (on that combo the stars are round to the corners of APS-C but there is residual curvature, so the stars are larger and unfocused even though round).


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turtledude1
member
*****

Reged: 10/08/08

Loc: SW Fla.& SW. NM
Re: timmbottoni new [Re: orlyandico]
      #5689923 - 02/19/13 11:00 PM

wrg My GTF102 is perfect, William Yang tuned it up personally gave it a star test and signed it off. No dust no prints just a beautiful new scope and I love the R&P focuser.
As I told William I just wish it came with the white rings instead of black they would look so much better with the red and white.

Russ


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gustavo_sanchez
sage


Reged: 12/30/10

Loc: Puerto Rico, US
Re: timmbottoni new [Re: orlyandico]
      #5689926 - 02/19/13 11:03 PM Attachment (78 downloads)

I decided to try to clean the optics very slightly, and although I still have some dust specks inside the objective, it's not as annoying as before...

Here is my new DSO imaging setup...


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