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Equipment Discussions >> Classic Telescopes

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tag1260
scholastic sledgehammer
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Reged: 10/07/12

Loc: Ohio, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6127816 - 10/09/13 08:23 PM

Should un-screw from the focuser.

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dawsonian2000
Carpal Tunnel
*****

Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6128305 - 10/10/13 02:01 AM

Hi

tag1260 is correct. They typically unscrew from the focuser. I will continue to look for a shorter one and get to you.

Another option would be to cut the tube off by about an inch. If you are apprehensive about doing this, I would be more than happy to do the work for you for free. All you need to do is get it shipped to me and I would take care of the rest. I am an accomplished ATM, so this would be my way of helping you out and giving back.

Mel


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terraclarke
Post Laureate
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6128703 - 10/10/13 10:07 AM

Mel +2

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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: terraclarke]
      #6129922 - 10/10/13 09:27 PM

Thanks Terra !

I think we both have offered viable solutions for Eric to consider. I still have to look through my collection spare parts to see if I can find a shorter adapter for him.

BTW - I love the collection of scopes you have. Several of which I have optics for and will be building in the future.

Mel


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ryanr256
super member
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Reged: 04/21/09

Loc: Southwest Ohio
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6129999 - 10/10/13 10:08 PM

A while ago I picked up a Meade 300 that didn't have the focuser back. I bought one like this:

http://www.ebay.com/itm/965-Meade-vintage-refractor-telescope-focuser-back-/3...

and it worked perfectly. With it, I am able to use a Blue Fireball .965 to 1.25 adapter and a true 1.25 diagonal without issue with any of my 1.25 eyepieces.

-Bob


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terraclarke
Post Laureate
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6130096 - 10/10/13 10:51 PM

Thanks Mel. I have enjoyed reading about your ATM projects and looking at the pictures of your fantastic builds that you've posted here on CN. They've been an inspiration for me.

Terra


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SpaceNetworks
sage
*****

Reged: 04/21/13

Loc: California
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6130139 - 10/10/13 11:16 PM Attachment (8 downloads)

Thanks to all for your advice and to Mel also for your generous offer!

I estimate that in-focus can be increased by 1/2" to 5/8" by using a shorter visual back and cutting the barrel of the diagonal. This is about the same distance as from the back of the main tube to the collar for the altitude adjusting rod (see attached photo).

Bob, thanks for the heads up about the vintage Meade visual back, which I actually saw and bookmarked last night, then, after seeing your post, I ordered tonight on eBay. Whether it will thread onto the focuser drawtube will be determined.

When I started this project I had no idea I would be scratching for a few extra millimeters!


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ryanr256
super member
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Reged: 04/21/09

Loc: Southwest Ohio
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6130155 - 10/10/13 11:23 PM

Quote:

Thanks to all for your advice and to Mel also for your generous offer!

I estimate that in-focus can be increased by 1/2" to 5/8" by using a shorter visual back and cutting the barrel of the diagonal. This is about the same distance as from the back of the main tube to the collar for the altitude adjusting rod (see attached photo).

Bob, thanks for the heads up about the vintage Meade visual back, which I actually saw and bookmarked last night, then, after seeing your post, I ordered tonight on eBay. Whether it will thread onto the focuser drawtube will be determined.

When I started this project I had no idea I would be scratching for a few extra millimeters!




I'm assuming your focus tube has internal threads.

Do a search on Google (or Bing) for "tasco 12te" and flip over to images. There are a few pics of the focusers and the backs on them are much shorter than the one you have.

I hope the one from ebay works for you.

-Bob


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SpaceNetworks
sage
*****

Reged: 04/21/13

Loc: California
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: terraclarke]
      #6130328 - 10/11/13 02:09 AM

Quote:

Thanks Mel. I have enjoyed reading about your ATM projects and looking at the pictures of your fantastic builds that you've posted here on CN. They've been an inspiration for me.

Terra




Mel,

Started to explore your website, and I too have enjoyed learning about your projects and resources. For starters, I had been looking for an editable observer data file, and yours seems like it will fit my needs. I'll be checking out more of your site soon. Thanks!


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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6130411 - 10/11/13 04:30 AM

Eric,

It is so refreshing to see you guys referring to the adapter as a visual back. I wanted to do so earlier, but did not want to confuse our budding amateurs.

Bob,

Awesome that you found the visual back on eBay. I wanted to do some research there, because I know that I saw one out there sometime ago. My colleague Gary Barabino (a.k.a G ) and I were talking about it as early as yesterday.

As I said earlier, I will look in my collection of vintage .965 components before I go on my 1-1/2 day Gulf of Mexico deep sea fishing trip today and see if we can find a visual back for Eric. I will report back before my departure...

Mel


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SpaceNetworks
sage
*****

Reged: 04/21/13

Loc: California
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6131747 - 10/11/13 06:46 PM Attachment (8 downloads)

Here's a photo of the focuser drawtube with threads for the visual back. I'm definitely in the market for a shorter visual back to increase in-focus.

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SpaceNetworks
sage
*****

Reged: 04/21/13

Loc: California
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6131749 - 10/11/13 06:47 PM Attachment (8 downloads)

One more...

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ryanr256
super member
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Reged: 04/21/09

Loc: Southwest Ohio
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6132169 - 10/11/13 10:48 PM

Dang, that's not good. The back from ebay will have external threads. You tube has external threads. They won't go together. :-(

-Bob


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BarabinoSr
Pooh-Bah
*****

Reged: 11/17/05

Loc: Slidell La
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: ryanr256]
      #6132343 - 10/12/13 01:07 AM Attachment (9 downloads)

Hey Eric ! I see your dilemma. I know if Mel has one he will send it to you, but if he doesn't , let me know. I have one that came from a focuser with a .965 size drawtube with outside threads like yours. Here's a pic. This one is a little bit over 1/2 " thick, with more than 1/4" thread and is not made of dos plastica. G

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SpaceNetworks
sage
*****

Reged: 04/21/13

Loc: California
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: BarabinoSr]
      #6132387 - 10/12/13 02:09 AM

Quote:

Hey Eric ! I see your dilemma. I know if Mel has one he will send it to you, but if he doesn't , let me know. I have one that came from a focuser with a .965 size drawtube with outside threads like yours. Here's a pic. This one is a little bit over 1/2 " thick, with more than 1/4" thread and is not made of dos plastica. G




Hello G

That looks very promising indeed-- thanks! Provided the threads match, the specs look spot on.


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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6135560 - 10/13/13 06:25 PM

Quote:

Quote:

Hey Eric ! I see your dilemma. I know if Mel has one he will send it to you, but if he doesn't , let me know. I have one that came from a focuser with a .965 size drawtube with outside threads like yours. Here's a pic. This one is a little bit over 1/2 " thick, with more than 1/4" thread and is not made of dos plastica. G




Hello G

That looks very promising indeed-- thanks! Provided the threads match, the specs look spot on.




Hi Eric,

I was hoping to find a visual back before leaving to go on my fishing trip, but I did not have time to check. Nevertheless, upon my returned from the trip, I checked and I found one. I can ship it to you once I have your mailing address, which you can PM me with.

BTW - The fishing trip was awesome!

Thanks Mel


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SpaceNetworks
sage
*****

Reged: 04/21/13

Loc: California
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: dawsonian2000]
      #6135731 - 10/13/13 07:59 PM

PM sent.

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dawsonian2000
Carpal Tunnel
*****

Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: SpaceNetworks]
      #6138254 - 10/15/13 02:00 AM Attachment (6 downloads)

Here is a photo of the visual back I will be sending. Basically, it is the same as the one Gary shared a photo of. I hope it moves your eyepiece close enough to achieve sharp focus.

Mel


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dawsonian2000
Carpal Tunnel
*****

Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser new [Re: terraclarke]
      #6138276 - 10/15/13 02:44 AM

Quote:

Thanks Mel. I have enjoyed reading about your ATM projects and looking at the pictures of your fantastic builds that you've posted here on CN. They've been an inspiration for me.

Terra




I must say, if I am not being too forward, you are the queen, my dear! You inspire us all.

Mel


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terraclarke
Post Laureate
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Tasco 12TE: Using 1.25 eyepieces w/ a .965 focuser [Re: dawsonian2000]
      #6138466 - 10/15/13 07:53 AM

Thank you. Wow. I just love our hobby and I love this group.



Terra


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