Binoviewer for big fast Dob

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Kingofthehill
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Binoviewer for big fast Dob

#1

Post by Kingofthehill »


Hi Everyone,

I am considering a binoviewer, mostly used with the scope I use most often, my 18UC. There have been multiple binoviewer threads in this forum and its predecessor, however I see the binoviewer being used mostly with refractors, not on Dobs. My major concern is my Interpupillary distance (IPD), 77 mm. I tried a binoviewer last year at a star party. The IPD was not adjustable enough to fit me. Not all manufacturers list the IPD in the specifications area of their units. There used to be a telescope shop within two hours of me, sadly, it is now Internet only sales, without a sales floor, so no test-before-I-buy option. I called Televue and asked what the IPD of theirs was, they didn't know. At least the person I was talking to couldn't find the answer.
Anyone out there, with a binoviewer, and eyes that are across the room from each other?
Paul
Main telescope used is Obsession 18UC
Cut my teeth on Orion 10" Dob
AR152 and Orion ST80 sit mostly unused
Lots of binoculars
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Re: Binoviewer for big fast Dob

#2

Post by notFritzArgelander »


I've owned and used the Baader Maxbright and Mark V units and they max out at ~75mm so I can barely use them since I'm at 73mm.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Kingofthehill
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Re: Binoviewer for big fast Dob

#3

Post by Kingofthehill »


notFritzArgelander wrote: Mon Nov 11, 2019 3:40 am I've owned and used the Baader Maxbright and Mark V units and they max out at ~75mm so I can barely use them since I'm at 73mm.
Obvious discrimination. When will the cranially endowed not be abused?
Paul
Main telescope used is Obsession 18UC
Cut my teeth on Orion 10" Dob
AR152 and Orion ST80 sit mostly unused
Lots of binoculars
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Lady Fraktor Slovakia
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Re: Binoviewer for big fast Dob

#4

Post by Lady Fraktor »


Siebert Optics 2" BV IPD is 55mm-82mm though they are not inexpensive.
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, AXJ, AXD
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Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror
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Kingofthehill
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Re: Binoviewer for big fast Dob

#5

Post by Kingofthehill »


Lady Fraktor wrote: Mon Nov 11, 2019 5:40 am Siebert Optics 2" BV IPD is 55mm-82mm though they are not inexpensive.
They certainly aren't.
Paul
Main telescope used is Obsession 18UC
Cut my teeth on Orion 10" Dob
AR152 and Orion ST80 sit mostly unused
Lots of binoculars
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helicon United States of America
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Re: Binoviewer for big fast Dob

#6

Post by helicon »


I wanted a binoviewer when I had my 18" - but then I sold the scope. My plan is to get one when I buy my next large Dob, but that won't be until I relocate to dark skies (about 3-5 years away at this point).
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
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Re: Binoviewer for big fast Dob

#7

Post by notFritzArgelander »


Kingofthehill wrote: Mon Nov 11, 2019 5:27 am
notFritzArgelander wrote: Mon Nov 11, 2019 3:40 am I've owned and used the Baader Maxbright and Mark V units and they max out at ~75mm so I can barely use them since I'm at 73mm.
Obvious discrimination. When will the cranially endowed not be abused?
Never. As long as the cranially unendowed are the "in" crowd in high school and adult politics, we're doomed. ;)
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Binoviewer for big fast Dob

#8

Post by Rainmaker »


Just a thought on the use of binoviewers with fast scopes.......
due to the broad light cone on faster Newts (like my F3,5) there can be quite severe vignetting at the binoviewer which are mostly designed for the quite narrow light cones of scopes from F5 to F15 etc....
Matt in Oz
Rainmaker “Excalibur” 18” F3.5 +SIPS @ 1860mm
TMB-LZOS 152mm F7.9 @ 1200mm
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denis0007dl
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Re: Binoviewer for big fast Dob

#9

Post by denis0007dl »


Kingofthehill wrote: Mon Nov 11, 2019 1:26 am Hi Everyone,

I am considering a binoviewer, mostly used with the scope I use most often, my 18UC. There have been multiple binoviewer threads in this forum and its predecessor, however I see the binoviewer being used mostly with refractors, not on Dobs. My major concern is my Interpupillary distance (IPD), 77 mm. I tried a binoviewer last year at a star party. The IPD was not adjustable enough to fit me. Not all manufacturers list the IPD in the specifications area of their units. There used to be a telescope shop within two hours of me, sadly, it is now Internet only sales, without a sales floor, so no test-before-I-buy option. I called Televue and asked what the IPD of theirs was, they didn't know. At least the person I was talking to couldn't find the answer.
Anyone out there, with a binoviewer, and eyes that are across the room from each other?
Hello Paul,

firstly, TeleVue BinoVue have IPD tange from 55-75mm max.

In 1.25" format, there are only 2 binoviewers with IPD 77mm, and are made by Carl Zeiss.
Here is one model
https://www.cloudynights.com/classified ... ewer-ever/

and here is second
https://www.cloudynights.com/classified ... inoviewer/

Hope it helps.

Kind regards
Denis
Binoviewers expert
CS and all the best
Denis Levatić
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