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Hot New Product: Tecnosky Horizon Binocular 1.25"

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18 replies to this topic

#1 APM M.Ludes

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Posted 18 January 2018 - 08:48 AM

http://www.apm-teles...tml?info=362144

 

tec-bino.jpg

tec-bino2.jpg

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Tecnosky Horizon Binocular 1.25"

 

The Bino is both prism/mirror design, and yes it has inside a corrector.

It is a new turret design with 1:1 magnification and It doesn't need OCS to reach the focus on newton and refractors.
We called it "Horizon" because it opens new horizons who wants to use a binoview on newton telescopes and refractors.
Who use these instruments knows well how difficult is reach the focus on a binoview with low power (or it is almost impossible) , it is necessary "cut the tube" or use big and expensive correctors...... but now it is no more necessary!
With Horizon binovew you can observe galaxies, clusters and other deepsky objects with a 400mm F/4,5 dobson at only 88x with a pair of 18mm wide field eyepieces or observer at only 50x with  a  150 F/6 achromat!
We recommend for this Bino our 60 degrees APM Flat eyepieces with focal lengths between 10mm and 24mm.

 

Delivered with:

    Bino
    Case

 

Specifications:
Eyepiece Adapter:1.25"
Prism system:New prism/mirror optical design
Focusing:Rotatable diopter adjustment
Magnification:1:1
eye relief:58 mm - 74 mm
Dimensions:127x106,7x50,4mm
Weight:716g
Unobstructed diameter:17.3mm

 

 

in stock !

 

asking US $ 395 plus shipping


Edited by APM M.Ludes, 18 January 2018 - 08:50 AM.

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#2 petert913

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Posted 18 January 2018 - 09:45 AM

Nice design and reasonable price.  I'm interested. 



#3 Mad Matt

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Posted 18 January 2018 - 10:04 AM

Very interesting design. It looks like the built in corrector also erects the image. (The Tecnosky website mentions this as well) 

 

I am wondering if this uses "traditional" beam splitter and prisms or a front surface mirrored half aperture splitter and mirrors as in the diagram?  



#4 MDavid

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Posted 18 January 2018 - 10:11 AM

Very interesting design. It looks like the built in corrector also erects the image. (The Tecnosky website mentions this as well) 

 

I am wondering if this uses "traditional" beam splitter and prisms or a front surface mirrored half aperture splitter and mirrors as in the diagram?  

Agreed...I was wondering about the image orientation well...as for the rest you mentioned it went ZIP right over my head...;)


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#5 Astrojensen

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Posted 18 January 2018 - 10:19 AM

I am wondering if this uses "traditional" beam splitter and prisms or a front surface mirrored half aperture splitter and mirrors as in the diagram?  

Ummm... The diagram shows a front surface mirror half aperture splitter and two mirrors, so what makes you wonder whether it uses this design or the traditional beamsplitter design?

 

 

Clear skies!
Thomas, Denmark



#6 Astrojensen

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Posted 18 January 2018 - 10:21 AM

 

Agreed...I was wondering about the image orientation well.

Image orientation is correct, like in a normal binocular, when used with a newtonian or a refractor without diagonal.

 

 

Clear skies!
Thomas, Denmark



#7 Mad Matt

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Posted 18 January 2018 - 10:44 AM

 

I am wondering if this uses "traditional" beam splitter and prisms or a front surface mirrored half aperture splitter and mirrors as in the diagram?  

Ummm... The diagram shows a front surface mirror half aperture splitter and two mirrors, so what makes you wonder whether it uses this design or the traditional beamsplitter design?

 

 

Clear skies!
Thomas, Denmark

 

Because that would be quite unusual. Most bino-viewers use prism based full aperture beam splitters and right angle prisms. I am not saying either is better or worse, simply curious.



#8 APM M.Ludes

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Posted 18 January 2018 - 01:21 PM

Mad

 

the great thing here beside the robust and nice mechanics , is you can use it out of the box in all scopes with short back focus, like a Lunt Solarscope or a classical Newtonian or Dobsonian. and if I compare the mechanical quality to the once of the binos which cost 100 or 200 less , than you get here a super nice quality product, still in-expensive


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#9 Astrojensen

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Posted 18 January 2018 - 03:33 PM

 

 

I am wondering if this uses "traditional" beam splitter and prisms or a front surface mirrored half aperture splitter and mirrors as in the diagram?  

Ummm... The diagram shows a front surface mirror half aperture splitter and two mirrors, so what makes you wonder whether it uses this design or the traditional beamsplitter design?

 

 

Clear skies!
Thomas, Denmark

 

Because that would be quite unusual. Most bino-viewers use prism based full aperture beam splitters and right angle prisms. I am not saying either is better or worse, simply curious.

 

I just wonder why you need to ask, when the technical drawing CLEARLY shows that the design is NOT based around the traditional beamsplitter... 

 

 

Clear skies!
Thomas, Denmark



#10 Mark9473

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Posted 18 January 2018 - 05:55 PM

Markus, I'm not sure how to understand your recommendation of eyepieces up to your 60° 24 mm when the specifications say the unobstructed diameter is just 17.3 mm. Can you explain how this will not lead to massive vignetting?


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#11 nicoyenny

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Posted 18 January 2018 - 07:07 PM

Keeping an eye on this ...



#12 nicknacknock

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Posted 18 January 2018 - 10:03 PM

Markus, I'm not sure how to understand your recommendation of eyepieces up to your 60° 24 mm when the specifications say the unobstructed diameter is just 17.3 mm. Can you explain how this will not lead to massive vignetting?

 

At 24mm the AFOV with a field stop of 17.3 comes out roughly to 41 degrees. I am curious myself. Now, if the bino had clear Aperture of say 23mm to 25mm, vignetting would be very much acceptable.



#13 denis0007dl

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Posted 18 January 2018 - 11:35 PM

Very nice stuff!

 

From drawings, I can see 16 air-to-glass surfaces, vs common bino 7 air-to-glass surfaces.

Would be interesting to see if it scatter more light vs common beamsplitter bino, and as well how contrast and sharpness compare.

 

For dobsonian and other scope users with back focus problem, without need of using and GPC to achieve backfocus, seems good option.


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#14 denis0007dl

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Posted 18 January 2018 - 11:38 PM

With APM 24mm UFF epcs, and bino 17.4mm field stop, one will get ortho like FOV instead wide field.



#15 APM M.Ludes

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Posted 19 January 2018 - 12:49 AM

the 24 mm 65 degree is not right, I have to correct that, yes, it should say 18 mm


Edited by APM M.Ludes, 19 January 2018 - 12:50 AM.

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#16 carballada

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Posted 18 April 2018 - 03:49 PM

Anyone tested? Any thoughts? 18mm 65deg not vigneting?



#17 kcl31

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Posted 26 April 2018 - 05:38 PM

Given the design has many lens involved to compensate the optical path length, I'm wondering what's its optimal f-ratio to work with? And does it work with coma corrector on newtonian (or dose it compensate coma too)?

 

Thanks



#18 APM M.Ludes

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Posted 27 April 2018 - 03:15 AM

it works with any f-ratio

 

it works with coma corrector on newtonian, yes



#19 Darkskyaz

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Posted 04 July 2018 - 03:44 PM

So has anyone tried one of these yet, or better yet, been able to compare them to Baader or Denkmier binoviewer? Orion does have a reputation for good value.   




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