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Equipment Discussions >> Classic Telescopes

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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Unitron 131-C
      #5708582 - 03/02/13 11:12 AM Attachment (137 downloads)

I figured i better start my own seperate thread on this Unitron 131-C before i test the patience of any of the Mods with my posting in the other thread
Eventually i`ll post some more images but heres a couple ive taken so far, once its all cleaned up i`ll take more.
Here`s one of the tube, the Meade ETX 90RA behind it was tossed into the deal free, Its like new..


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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C new [Re: Dave M]
      #5708593 - 03/02/13 11:16 AM Attachment (67 downloads)

The Unihex and eyepieces that came with it.
Someone had a t-ring duck taped to the 1.25" tube, so i
need to clean that old dried up glue off it.
I have the focuser tube for the Unihex, its just not in the image, the other tube that is is some sort of extension or something.


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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C new [Re: Dave M]
      #5708596 - 03/02/13 11:17 AM Attachment (61 downloads)

One shot of the mount..needs a good cleaning, and i`ll relube it.

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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C new [Re: Dave M]
      #5708609 - 03/02/13 11:24 AM

Once i get time i`ll post a few more. It came with a Unitron box thats in excellent shape but i`m not sure what its for, it just had some accessories in it.
I`ll also post a objective image, glass and coating are in excellent shape.
What does puzzle me is why it came with 3 aperature reduction masks


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javago
super member


Reged: 11/02/04

Loc: Geldrop-Netherlands
Re: Unitron 131-C new [Re: Dave M]
      #5708628 - 03/02/13 11:40 AM Attachment (63 downloads)

Nice Unitron Dave !.....I found one a couple of weeks ago and in a great condition like yours.Only thing missing are the solar plates and rod.Did you get them with your telescope?

Jan-Netherlands


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Da Bear
scholastic sledgehammer
*****

Reged: 11/21/06

Loc: Kali-Forn-Ya
Re: Unitron 131-C new [Re: javago]
      #5708654 - 03/02/13 11:56 AM

Just wonderful...

Da Bear


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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: Unitron 131-C new [Re: Da Bear]
      #5708784 - 03/02/13 12:52 PM

Wow, you done good with that purchase!

-Tim.


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niteskystargazer
Carpal Tunnel
*****

Reged: 10/05/09

Loc: 41-43'-28" N 87-42'-39" W
Re: Unitron 131-C new [Re: Dave M]
      #5708854 - 03/02/13 01:38 PM



Nice Unitron Dave ! .

CS,KLU,

,

Tom


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sgorton99
Post Laureate
*****

Reged: 04/30/08

Loc: Wisconsin, Madison
Re: Unitron 131-C new [Re: niteskystargazer]
      #5708859 - 03/02/13 01:41 PM

Awesome!

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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Unitron 131-C new [Re: sgorton99]
      #5708983 - 03/02/13 03:15 PM

Wonderful find. I'm glad you got it. I thought of running up there to have a look too when I saw the CL listing but had to stop myself

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Joe Cepleur
Carpal Tunnel


Reged: 03/18/10

Loc: Dark North Woods
Re: Unitron 131-C new [Re: terraclarke]
      #5708988 - 03/02/13 03:20 PM

What bends the light inside those tubes, prisms or mirrors?

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starman876
Postmaster
*****

Reged: 04/28/08

Loc: VA
Re: Unitron 131-C new [Re: Joe Cepleur]
      #5709195 - 03/02/13 05:38 PM

Mirrors. Flats.

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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C new [Re: Joe Cepleur]
      #5709198 - 03/02/13 05:39 PM

Gee!, i didnt know Unitrons were so popular around here , i do realy appreciate all the nice comments from everyone, Thank! You All.

I have to give another Big Thanks! to my friend Tom Kiehl for calling me about this scope about a hr after it appeared on Craigslist, then over the course of a few conversations he persuaded me to call about it and set up a time to go see it, the rest as they say is history.


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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C new [Re: javago]
      #5709211 - 03/02/13 05:45 PM Attachment (50 downloads)

Hi Jan,

You have a real Beauty there, Congratulations for also finding one.
Yes, mine came with the sun plates, here`s a image of them.
The smaller one on the right is i believe to another telescope, but it was in the box also.


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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C [Re: Joe Cepleur]
      #5709219 - 03/02/13 05:48 PM

Quote:

What bends the light inside those tubes, prisms or mirrors?




Hi Joe, it has two first surface mirrors inside, a small 36mm diameter one up by the objective and a 60mm diameter mirror at the focuser end.


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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C [Re: Dave M]
      #5709228 - 03/02/13 05:55 PM Attachment (43 downloads)

Not sure why there was three of these aperature reduction masks in the box, i know you use them for the sun.

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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C [Re: Dave M]
      #5709240 - 03/02/13 05:59 PM Attachment (35 downloads)

The Box, this is the only one that came with it, i`m not sure what its for but its in realy great shape, i know its not for the tube, not deep enough.

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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C [Re: Dave M]
      #5709245 - 03/02/13 06:00 PM Attachment (42 downloads)

Box inside..

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Joe Cepleur
Carpal Tunnel


Reged: 03/18/10

Loc: Dark North Woods
Re: Unitron 131-C [Re: Dave M]
      #5709506 - 03/02/13 08:21 PM

Quote:

Quote:

What bends the light inside those tubes, prisms or mirrors?




Hi Joe, it has two first surface mirrors inside, a small 36mm diameter one up by the objective and a 60mm diameter mirror at the focuser end.




Took a moment to follow that. The light path is folded. The point is that the larger mirror must be nearer to the objective, and the smaller mirror nearer to the focuser, at least viewed in relation to the direction of photons in the visible spectrum flying along the scope's light cone. They enter a 3" aperture, bounce off the large mirror, then the small mirror, then exit the still smaller eyepiece. If we excited the photons into X-rays so they could pass through the walls, then, sure; due to the folding, the small mirror would be near the objective, and the large mirror near the focuser, but that's not how visible-light photons in the tube see it.


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Dave M
Postmaster
*****

Reged: 08/03/04

Loc: Ohio
Re: Unitron 131-C [Re: Joe Cepleur]
      #5709567 - 03/02/13 09:06 PM

Quote:

Quote:

Quote:

What bends the light inside those tubes, prisms or mirrors?




Hi Joe, it has two first surface mirrors inside, a small 36mm diameter one up by the objective and a 60mm diameter mirror at the focuser end.




Took a moment to follow that. The light path is folded. The point is that the larger mirror must be nearer to the objective, and the smaller mirror nearer to the focuser, at least viewed in relation to the direction of photons in the visible spectrum flying along the scope's light cone. They enter a 3" aperture, bounce off the large mirror, then the small mirror, then exit the still smaller eyepiece. If we excited the photons into X-rays so they could pass through the walls, then, sure; due to the folding, the small mirror would be near the objective, and the large mirror near the focuser, but that's not how visible-light photons in the tube see it.




Yeah, the larger mirror would be closer to the objective if following the light path, physically they are positioned as i mentioned above Sorry if i was confusing on it.


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