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Trying to identify strange eyepiece revolver

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#1 LukaszLu

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Posted 03 January 2021 - 10:11 AM

I search the internet but to no avail. Maybe someone recognizes this construction?

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#2 Richard O'Neill

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Posted 03 January 2021 - 10:18 AM

I don't recognize it. Perhaps it's an early version from Unitron for a microscope?


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#3 ngc7319_20

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Posted 03 January 2021 - 11:43 AM

I've seen it before on a scope.  Will try to recall...


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#4 Garyth64

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Posted 03 January 2021 - 11:52 AM

Jason Rotary Power, I think.


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#5 LukaszLu

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Posted 03 January 2021 - 11:59 AM

Jason Rotary Power, I think.

In this case, the optical axes of the eyepieces lie in the same plane as the axis of the telescope ...



#6 PawPaw

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Posted 03 January 2021 - 01:21 PM

Unitron offered one that was designed for their 700 series scopes in the 60's.  Not as common as their unihex.  

 

See Dave Trott's video:

 

https://www.youtube....h?v=PER__3A0Ne0

 

Don


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#7 Terra Nova

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Posted 03 January 2021 - 04:07 PM

Unitron offered one that was designed for their 700 series scopes in the 60's.  Not as common as their unihex.  

 

See Dave Trott's video:

 

https://www.youtube....h?v=PER__3A0Ne0

 

Don

Yes, and I think they only work for straight-thru viewing. No mirror or prism inside.


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#8 Kasmos

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Posted 03 January 2021 - 04:46 PM

Like Dave shows in the video, it was a stand alone model, not an accessory. What's curious is how closely the other brands were made and like them my Mayflower vari-power (Circle T) had the exact same tripod and mount. My guess is that all of them that had the 3 rotating EPs were the earliest versions of the var-power scopes, and were replaced by the ones that you pulled the draw tube to change powers.


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#9 izar187

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Posted 03 January 2021 - 05:20 PM

With the built in image erector in the video, does that imply that the original concept market was perhaps terrestrial spotting scopes? Military concept cross-over?


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#10 LukaszLu

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Posted 03 January 2021 - 05:44 PM

Unitron offered one that was designed for their 700 series scopes in the 60's.  Not as common as their unihex.  

 

See Dave Trott's video:

 

https://www.youtube....h?v=PER__3A0Ne0

 

Don

Yes! I think that's it! Thank you for all suggestions and help!!



#11 LukaszLu

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Posted 08 January 2021 - 12:51 PM

Well, it seems this is not an Unitron. Maybe the Hy-Score (Goto) Vari-Power? I've decided to buy it and will make some more photos when it arrives...



#12 Marty0750

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Posted 10 January 2021 - 01:41 AM

Eyepieces have that Unitron design look. The unit however is not Unitron

 

Unitron eyepieces from my collection

https://www.cloudyni...2#entry10756239



#13 dave brock

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Posted 10 January 2021 - 07:02 AM

I have one that looks like Unitron but no maker's mark. No image erector.

 

new pics 11.jpg



#14 LukaszLu

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Posted 10 January 2021 - 08:22 AM

I have one that looks like Unitron but no maker's mark. No image erector.

 

attachicon.gifnew pics 11.jpg

Hi, it looks like the "Rotary Eyepiece Selector" from Unitron/Polarex NS 133N-11 - it can be seen on Dave Trott's video mentioned by Don: https://youtu.be/PER__3A0Ne0?t=228

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#15 PawPaw

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Posted 10 January 2021 - 08:52 AM

To be technically correct......Nihon Seiko manufactured a rotary eyepiece unit similar to the pic in your first post that was offered by Unitron, Polarex, and other resellers/importers.

 

"I have one that looks like Unitron but no maker's mark. No image erector."

Dave that looks like Nihon Seiko to me, especially the slots in the eyepiece tubes.

 

Don


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#16 LukaszLu

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Posted 10 January 2021 - 09:00 AM

When identifying, it is helpful to know what is removable and what is not. In some cases, eyepieces are removable, but the whole unit remains permanently attached to the focuser, in other cases the whole unit and the eyepieces are removable, and in others - everything is permanently attached.
It seems that in my case eyepieces are removable, while the whole unit is not.



#17 starman876

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Posted 10 January 2021 - 10:30 AM

Yes, only seen a few times.  I think one was for sale not to far from here.  Unitron all the way.



#18 LukaszLu

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Posted 22 January 2021 - 07:54 AM

OK, the eagle has landed... What do you think? Does anyone know this species?

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#19 starman876

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Posted 22 January 2021 - 08:35 AM

Nihon Seiko production on the eyepieces holder.   The T on the focuser looks like Towa.  


Edited by starman876, 22 January 2021 - 08:36 AM.

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#20 LukaszLu

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Posted 22 January 2021 - 10:51 AM

Hi, the problem is that the eyepiece holder seems to be integral part of the scope. It's unremovable, as well as the eyepieces (they can be unscrewed). So NS eyepiece holder in a Towa's scope? Is it possible? Please note, that eyepieces magnifications differ from early Unitron/Polarex 133N and are the same as Hy-Score Vari-Power. Maybe this is a lead?

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#21 LukaszLu

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Posted 23 January 2021 - 08:22 AM

A few more pics - maybe someone will recognize something characteristic?

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