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Linear binoviewers - are they all one rebranded Chinese product?

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#1 acem77

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Posted 20 April 2024 - 08:31 AM

It was suggested I look into linear binoviewers in a post asking for a discontinued glass path corrector.

 

I have started to Google and I'm finding different linear binoviewers but they all seem to be the same device just different colors and branding on them? I heard this is a common practice on one YouTuber's channel. At the moment it seems there is very limited info on YouTube or other resources related to different brands and quality/features of these linear binoviewers.

Are there any recommendations for better quality linear binoviewers 

I also noticed that not everyone calls them linear binoviewers some use different terms.

 

Some examples these all look the same to me.

Long Perng 1.25" Erect Image Divergent Binoviewer with Zero Optical Length

 

Orion Premium Linear BinoViewer for Telescopes

 

Tecnosky Horizon Binoviewer : Compatible with ALL Lunt Solar Telescopes

 

Explore Scientific BinoViewer for Telescopes - ES-BINOV

 

 



#2 Doug Culbertson

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Posted 20 April 2024 - 08:38 AM

All from Long Perng, so no difference other than price and color. There is also the Omegon (Astroshop.de) Kasai (Japan), Bresser, TS Optics, Stella Lyra (FLO) and probaby more. 


Edited by Doug Culbertson, 20 April 2024 - 08:42 AM.

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#3 deSitter

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Posted 20 April 2024 - 09:22 AM

All from Long Perng, so no difference other than price and color. There is also the Omegon (Astroshop.de) Kasai (Japan), Bresser, TS Optics, Stella Lyra (FLO) and probaby more. 

Are these like microscope binocular heads?

 

-drl



#4 denis0007dl

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Posted 20 April 2024 - 09:25 AM

No, these are not microscope binocular heads, and are tottaly different design.

Denis
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#5 faackanders2

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Posted 20 April 2024 - 06:19 PM

Are these like microscope binocular heads?

 

-drl

microscope binocular heads were the first binoviewers, before they started making them specifically for astronomy a;;owing 1.25" eyepieces etc.



#6 paulsky

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Posted 24 April 2024 - 10:10 AM

What is a LinearBinoviewer? 



#7 Doug Culbertson

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Posted 24 April 2024 - 10:31 AM

What is a LinearBinoviewer? 

This is a linear binoviewer: https://www.telescop...opes/130300.uts

 

If you plug linear into the search in this forum you will find more information than you can take in at one time. 



#8 Ice Cube

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Posted 28 April 2024 - 09:54 PM

i believe that Kasai holds the patents (even if it's built in a Long Perng factory)



#9 Lentini

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Posted 28 April 2024 - 10:34 PM

I have the Omegon version. Yes, there is way more than one day of reading you can do on the forum discussing these. TLDR: They add zero to the glass path. They put up nice views. There is a reason so many companies have acquired rights and branded them.



#10 deSitter

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Posted 30 April 2024 - 12:51 AM

I have the Omegon version. Yes, there is way more than one day of reading you can do on the forum discussing these. TLDR: They add zero to the glass path. They put up nice views. There is a reason so many companies have acquired rights and branded them.

Thread reference please? I would like to understand the internals.

 

-drl



#11 Lentini

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Posted 30 April 2024 - 10:28 AM

Not sure if this is accurate, but in my quick search, post #65 has a ray trace:

 

https://www.cloudyni...es-or-no/page-3


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#12 deSitter

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Posted 08 May 2024 - 05:20 AM

Not sure if this is accurate, but in my quick search, post #65 has a ray trace:

 

https://www.cloudyni...es-or-no/page-3

That is INSANE :)

 

-drl



#13 acem77

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Posted 15 May 2024 - 10:59 PM

Received my
Omegon Binocular Head Pro Tritron bino-viewer.
And 2nd Baader Hyperion Mark IV.

I am really happy with this setup.
Works good at both extremes of the Mark IV lenses capability. I have to unscrew the eye spacers and use the rubber eye cups to allow the IPD distance for my nose to achieve alignment and add magnetic counter weights to the dob.

Took a little extra time to get used to it but
I am going to find it hard to go back with a single lens.

So far I've only been able to view the stars, moon and the sun. It was a real treat seeing the big sunspot that caused the aurora this last weekend.

Can't wait to try looking at a few planets and some deep space objects like the ring nebula.
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