Baader MaxBright® II Binoviewer with case

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Baader MaxBright® II Binoviewer with case

# 2456460

425,00 € Price excl. German VAT tax (0%): € 357.14

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Finally we can introduce the MaxBright® II Binoviewer. It closes the gap between cheaper entry-level binoviewers and our high-end Mark V Giant Bino.

  • 27mm prisms with 26 / 25,5mm clear aperture, for all 1,25"-eyepieces – up to focal lengths of 35mm
  • Ergonomically designed ClickLock® eyepiece clamps with diopter adjustment
  • Baader Astro T-2 System™ connector thread (M 42 x 0.75) and Zeiss micro-bayonet for the shortest possible connection to (almost) all existing telescope systems
  • Scope of delivery: Baader MaxBright® II Binoviewer with adapters to T-2 and Zeiss micro-bayonet in a padded carrying case (image coming soon)
  • Optical tube length: 110 mm (+/- 1 mm tolerance)
  • Weight: 595g (200g lighter than Mark V)

Read the extensive 22-page test review by Bill Paolini (May 2nd, 2020)

Product Questions

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I am considering a purchase of binoviewer to use with my 305/1500 collapsible SkyWatcher dob. I would like to use ADC for planetary viewing, hence I need at minimum a 2x barlow/f.extender. my question is: could the 2.6 GPC be placed before ADC, i.e. can additional 55mm of lightpath be introduced between the GPC and binoviewer (OTA -> 2.6 GPC -> ADC -> bino)? Focusing distance is not much of an issue, since mirror can easily be moved. I am more interested in understanding how GPC will behave - is it sort of telecentric or 2.6x effect with distance becomes 3x or more.
Question by: Romas on Sep 23, 2020 9:32:00 AM | 1 Answer(s)
I have a Bresser AR127L telescope, I just went ahead a minute again and bought a MaxBright II binoviewer without accessories. So from a newbie question here, what other accessories and eye piece do I need to set it up on my Bresser telescope. Can I use a 2” eye piece as well instead of the 1,25”?. Sorry, am clueless on Binoviewer.
Question by: Syukk on Aug 16, 2020 1:48:00 PM | 1 Answer(s)
First Merry Christmas!
I wonder if someone can help me. I have the original Binoviewers Maxbright and I want to change the screws (6) that hold the eyepieces with "knurdle" kind, easier to change eyepieces. Can you please tell me the size, someone said they are M4. But not sure. Are they metric? Coarse thread, etc.
Really appreciated, I have many of your products and very happy with them.
Thanks again.
Question by: Emilio Lavignasse on Dec 26, 2020 6:36:00 AM | 1 Answer(s)
What is the lightpath length of this binoviewer?
Question by: Jeffrey L. Jennings on Feb 18, 2020 6:49:00 PM | 1 Answer(s)
I have a Celestron 1100 Edge HD, will this Binoviewer work with that? And if so, what accessories will I need?
I also have a 70mm SolarMax III. Will I be able to use it with that? Again what accessories will I need?
Question by: Clayton on Mar 31, 2020 12:29:00 AM | 1 Answer(s)
Can this be used for terrestrial viewing using an 8" SCT? Will the image be upright / mirror imaged / upside down?
Question by: Ben on Jun 5, 2020 5:51:00 PM | 1 Answer(s)
Do you know when binoviewer will be available?
Question by: Paul on Oct 2, 2020 9:28:00 AM | 1 Answer(s)
Do I need any additional accessory, that is not included in "MaxBright II Binoviewer with case", to use it with the Stellarvue 90 f7 Raptor Triplet Refractor? Thanks
Question by: Evgeny on Jan 15, 2020 3:28:00 PM | 1 Answer(s)
What are the maximum angle eyepieces you can use with these binoviewers? Would I get the full benefit of using 82° eyepieces or would I need something narrower?
Also, have you any idea when they will be available for sale again?
Question by: Lee Simpson on Dec 16, 2020 7:39:00 PM | 1 Answer(s)
Interestingly, everywhere I read that binoviewers don't require any focal point adjustments for Maksutov telescopes, yet I read you recommend one. My Mak is f/15, so buying Maxbright 2 will cost extra accessory?
Question by: Martin on Mar 23, 2021 6:27:00 PM | 1 Answer(s)
I would like to purchase a Baader MaxBright® II Binoviewer but have had conflicting advice as to the adapters i need, from 3 suppliers. I have a Meade LX90 250mm with a FL of 2500mm F/10. I have an upgraded Meade Series 5000 2" Enhanced Diagonal. I use a 10mm Bader Hyperion 68 degree as my absolute favourite eyepiece. I was thinking of getting a Baader MaxBright® II Binoviewer and 2x 7-8mm eyepieces for mostly planetary viewing. Will i need any adapters, or UAG etc?
Question by: Bradders on Oct 4, 2020 6:32:00 AM | 1 Answer(s)
I am considering buying the Maxbright ll (mainly because of the clicklock) and was wondering how much difference optically I will see in comparison with original Maxbright that I own. I use them on a Celestron 8SE with TV 2" everbrite dielectric diagonal. Thanks!
Question by: Emilio Lavignasse on Jan 12, 2021 4:21:00 PM | 1 Answer(s)
I have a Celestron Evolution 9.25 with Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp. Removing the Diagonal is not easy because I have to remove first the ClickLock Clamp, due to the focuser knob position. What is the recomended acessories to use MaxBright® II Binoviewer with my Celestron?
Question by: António Vilela on Sep 17, 2019 3:32:00 PM | 1 Answer(s)
Does it make sense to use 2-31mm Hyperion 72 with Hyperion zoom barlow 2.25 at the end of bino? What will be magnification and FOV?
Question by: Emilio on Dec 18, 2020 9:46:00 PM | 1 Answer(s)
Are 2 Baader Zoom eyepieces a good match for this binoviewer?
Question by: Pairing with Baader Zoom MarkIV on Oct 20, 2020 4:05:00 AM | 1 Answer(s)
Is the Alan Gee mark II with a diagonal applicable to the MB II if only the back focus is enough?
Question by: Toshi on Aug 16, 2019 2:40:00 AM | 1 Answer(s)
Please could you tell me what would i need (if i need anything) to make it work on a televue 76 mm refractor ?
Question by: cyril on Oct 28, 2019 10:18:00 AM | 1 Answer(s)
I have strabismus. Should I have trouble using MaxBright II due to this condition?
Question by: Rafael Sampaio on Jun 20, 2020 11:04:00 PM | 1 Answer(s)
The nosepiece and eyepiece holder of my Celestron star diagonal can be both removed leaving a 2" SC female thread. To attach the MaxBrite II to that star diagonal will I be able to do it with the Baader Adapter 2" (male) / T-2 (male) [Part # 1508035] or will I need any extra adapters. I thought first maybe the Baader 2" SCT to T-2 Zero-Length Reducer Adapter, but I don't think that will work. Any help you can give would be greatly appreciated.
Question by: Clayton Hare on Aug 1, 2021 9:53:00 PM | 1 Answer(s)
I have the MaxBright II and the 2" 1,7 GPC to use with my Newtonian (Orion XT10G). It arrived today. The instructions clearly state that I must remove the T2 Counternut with the Zeiss microbayonet. However, when I do this, there does not seem to be a way to connect the GPC to the MBII. However, if I leave that counternut in place, and do not put on the microbayonet, I can easily thread the GPC to the MBII. Can you help me eliminate the confusion?
Question by: Kevin Simpson on Nov 6, 2020 4:49:00 AM | 1 Answer(s)
I would like to know what is the light transmission of both side of the binoviewer? Do you know how does it compares to Televue or Deinkmeier binoviewer regarding light transmissions?
Question by: Allan on Apr 20, 2020 1:59:00 PM | 1 Answer(s)


Baader MaxBright® II Binoviewer

"Supercharged" by design

The MaxBright® II Binoviewer incorporates the knowledge aquired during thirty years of building astronomical binoviewers. It is superior to cheaper models in many details.

Baader Maxbright Binokular

MaxBright® II Binoviewer highlihgts

  • The housing of the 27mm large prisms is made with our own die casting moulds, using Carl Zeiss production drawings. The non-slip leather finish provides extra grip when holding the binoviewer with heavy eyepieces in your hand.
  • On the eyepiece side, the newly designed, self-centering Clicklock® eyepiece clamps with diopter adjustment are immediately noticeable. Thanks to the ergonomic design, you can blindly distinguish between clamping and diopter compensation even in the dark. The inner parts are made of stainless steel for maximum stability. The high-quality eyepiece clamps are only the last part of the precisely collimated optical system, which is designed for highest magnifications. This is the only way to achieve the almost three-dimensional image and relaxed observation expected from a binoviewer.
  • All optical surfaces of the Maxbright® II feature a 7-layer multi-coating. The prism chairs (mounts) of the prisms are constructed like those of the Mark V Großfeld (Giant)-Binocular (#2456410, € 1275,-) . The clear aperture is 26 mm on the telescope side and 25,5mm on the eyepiece side – even our 35 mm eudiascopic eyepieces are illuminated without vignetting. In comparison to models with smaller prisms you can see a much larger part of the sky at the same magnification – similar to our Mark V Großfeld (Giant)-Binocular (#2456410, € 1275,-) .
  • On the telescope side, either a T-2 cap nut or a dovetail ring with original Zeiss micro bayonet are available – both connection options are included in the scope of delivery and allow a very compact adaptation to all common threads as well as our T-2 prisms and mirrors. Compared to fixed nosepieces, this effectively saves a lot of backfocus. The MaxBright® II is compatible with all Baader Glasspathcorrectors. According to optical calculations by Carl Zeiss, these correction lens systems shift the focus outwards so that you can still reach focus despite the approximately 11 cm back focus (the required inward travel of the focuser) of the binoviewer. They also compensate for the colour error that would otherwise be introduced through the prisms when using telescopes between f/4 and f/7. Glasspathcorrectors are not simple Barlow lenses, even if they resemble them. For this reason, in Germany the name Glaswegkorrektor® is a protected trademark by Baader Planetarium.

In combination with a lens telescope or a Schmidt-Cassegrain we recommend the Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B) (#2456095, € 215,-) or the Baader FlipMirror II Star Diagonal (#2458055, € 195,-) , to achieve a compact telescope adaptation. In addition, you can then choose a matching Glasspathcorrector

To select the right Glasspathcorrector, you need to know the backfocus of your telescope. You can read how to do this in the Manual of the Maxbright® II Binoviewer.

For Newtonians,we recommend either the large 2" Glasspathcorrector® 1,7x for Newtons (#2456300, € 195,-) or the Glasspathcorrector 1:2,60 for Baader-Binoviewer with Zeiss ring dovetail (MaxBright® II and Mark V) (#2456317, € 99,-) .

For SCs or lens telescopes we recommend either the 2" Glasspathcorrector® 1,8x for Refractors and SC's (#2456305, € 180,-) or the two T-2 Glasspathcorrectors Glasspathcorrector 1:1,25 for Baader-Binoviewer with T-2 thread (MaxBright® II and MaxBright®) (#2456314, € 92,-) and Glasspathcorrector 1:1,70 for Baader-Binoviewer with T-2 thread (MaxBright II® and MaxBright®) (#2456316, € 96,-) . The 1.25x Glasspathcorrector is used on lens telescopes mainly for removing the colour aberrations, which would otherwise be introduced by the long light path through the prisms of the binoviewer.

You don't necessarily need a Glasspathcorrector for Schmidt-Cassegrains with f/10. Especially for lower magnifications and thus larger fields vof view, the Alan Gee Telecompressor Mark II (T-2 part #20) (#2454400, € 245,-) is more interesting: It shortens the focal ratio to ca. f/5,9, which gives you a brighter image and a larger field of view. So, a C8 almost becomes a rich-field telescope – for comfortable observations with both eyes open!

Facts on Binoviewing

Binoviewers and accessories

Baader Planetarium has more than 30 years of experience in building binoviewers. Therefore we do not offer simple modified microscope binoviewers without further accessories, but complete system solutions.

With monocular vision, your brain can only use a fraction of its "computing capacity". In fact, there is a kind of "emergency mode" in the brain so that even image information obtained with one eye can be distributed to both halves of the brain, but the brain has no way of correctly interpreting the "image errors" and above all the "nerve noise" that inevitably occurs during energy transport - just like with a CCD image!

Just as the user of a CCD camera or webcam superimposes several images in the computer, i.e. "stacks" images, the brain can also superimpose the different information from both eyes during binocular vision and in this way - each time in milliseconds - eliminate the imperfections that are not part of the real image.

So it is no wonder that after observing with one eye for a few minutes, you will have to take a rest that your brain demands because it is simply overloaded by the extremely concentrated viewing. In binocular vision, this problem does not exist! You can look as long as you want and remain relaxed. Even with severely impaired vision in one eye, the reduced tension results in an enormous gain in observation quality.

One often hears the criticism that using a binoviewer would split the light into two visual channels and that only 50% of the light intensity reaches each eye. This argument prevents many people from trying out for themselves what a revolutionary effect binocular vision has. But what is forgotten is that 50% of the light reaches each eye and that the energy from both eyes is "reunited in the brain" (more precisely, in the back of the head).

What you then see is by no means 50% darker than it is claimed. The real gain is only visible for someone who has tried it out for himself and has familiarized himself with this kind of seeing for a few minutes. Ultimately, the object doesn't look darker, but becomes visible effortless, more detailed and - more beautiful.

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Additional Information

Manufacturer Baader Planetarium
SKU (#) 2456460
EAN Code 4047825042873
Net weight (kg) 0,595
Aperture (mm) Teleskopseitig 26 mm, Okularseitig 25,5 mm
Prisms 27 mm
Lens Coatings 7-lagig Mehrschicht-entspiegelt
Prism Coatings 7-lagig Mehrschicht-entspiegelt
Included Accessories ABS hard plastic case, T-2 thread adapter, Zeiss ring dovetail

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Martin Federspiel 181/06/2020 30/06/202015:19
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Immersives Seherlebnis mit dem Baader MaxBright II Binokularansatz
Das Baader MaxBright II Binokular ist ein sehr hochwertiges Zubehör für jeden, der die großen Vorteile beidäugigen Beobachtens am Fernrohr ausnutzen möchte.

Die Beobachtung mit beiden Augen hat ihre eigene Qualität. Durch ein Fernglas schaut man für gewöhnlich komfortabel mit beiden Augen. Bei einem astronomischen Fernrohr ist einäugiges Beobachten der Standard. Ein Binokularansatz ist daher ein sehr empfehlenswertes Zubehörteil, um an einem Fernrohr entspannt mit beiden Augen zu beobachten und so ein vollkommenes Wahrnehmungserlebnis zu erzielen.

Ich beobachte schon seit etwa 30 Jahren mit einem frühen Baader-Binokularansatz mit einem um 60° abgewinkelten Einblick. Dieses Gerät war für die damals gängigen Okulare gebaut. Moderne Okulare mit großem scheinbaren Gesichtsfeld werden von den kleinen Prismen mit 19 mm Durchlassöffnung nicht vollständig ausgeleuchtet.

Seit Jahren liebäugelte ich daher mit einem moderneren Bino, das zudem auch noch erschwinglich ist. Seit Frühjahr 2020 ist nun nach längerer Entwicklungs- und Produktionszeit das Baader-Maxbright II Binokular verfügbar. Die Prismen mit 26 mm freiem Durchlass leuchten auch weitwinkligere 1 1/4"-Okulare aus. Ich verwende es an einem 250 mm Schmidt-Cassegrain-Teleskop (f/10) und an einem 80 mm ED-Refraktor (f/6,25). Als Okulare sind Paare aus der Baader-Hyperion-Serie mit 68 Grad scheinbarem Gesichtsfeld und ein Paar älterer 35 mm Eudiaskopische Okulare (48 Grad scheinbares Gesichtsfeld) im Einsatz.

Beobachtung am langbrennweitigen Schmidt-Cassegrain-Teleskop
Schmidt-Cassegrain-Teleskope haben in der Regel einen sehr großen Fokussierbereich und einen großen Backfokus, sodass sich der Fokus mit dem MaxBright II in Kombination mit herkömmlichen Zenitspiegeln und ohne Glaswegkorrektor problemlos erreichen lässt. Die Bildschärfe ist hervorragend, ein Test mit engen Doppelsternen bei gutem Seeing ergab, dass das Auflösungsvermögen des Teleskops erreicht wird. Auch ohne Glaswegkorrektor konnte ich keinen Farbsaum etwa am hellen Mondrand erkennen. Ein Glaswegkorrektor kann trotzdem sinnvoll eingesetzt werden. Er verlängert die Brennweite des Teleskops und steigert damit auch die Vergrößerung. Mit einem Okularpaar und einem Glaswegkorrektor hat man so schon zwei Vergrößerungsstufen.

Helle Objekte wie Sonne (natürlich nur mit geeignetem Sonnenfilter vor dem Teleskop!), Mond und Planeten sind die Paradeobjekte für binokulares Beobachten. Bei guter Luftruhe und Kollimation des Teleskops lassen sich feinste Details in Sonnenflecken, der Sonnengranulation, in den sehr abwechslungsreichen Mondlandschaften, auf dem Mars, in der turbulenten Jupiteratmosphäre usw. erkennen. Mit den Signalen aus beiden Augen kann unser Gehirn ein optimales Bild errechnen, das ohne große Ermüdung schwache Kontraste und kleinste Strukturen zeigt. Die Beobachtung mit nur einem Auge empfinde ich wesentlich anstrengender. Bei manchen Objekten, etwa dem sehr detailreichen Mond, ergibt sich ein dreidimensionaler Eindruck, der natürlich nicht real ist, sondern von der Bildverarbeitung im Gehirn herrührt. Mit den schon recht weitwinkligen Hyperion-Okularen am Bino taucht man richtig in das Gesehene ein und fühlt sich als Teil der Szene, etwa als Raumfahrer, der über dem Mond schwebt. Mit anderen Worten: binokulares Beobachten wird zu einem immersiven Erlebnis.

Aber auch hellere strukturierte Deep Sky-Objekte wie Kugelsternhaufen lassen sich mit Gewinn binokular beobachten. Die aufgelösten Sterne scheinen vor dem diffusen Hintergrund der nicht aufgelösten Sterne zu schweben. Ich empfand auch Planetarische Nebel hoher Flächenhelligkeit und helle Gasnebel als lohnende Ziele für die Beobachtung mit dem Binokular.

Beobachtung mit dem 80 mm-ED-Refraktor
Mit diesem Instrument lässt sich mit dem Binokular der Fokus in Kombination mit einem normalen 2"-Zenitspigel nicht erreichen, auch nicht unter Verwendung eines 2,6x-Glaswegkorrektors. Es klappt erst, wenn man ein kurzbauendes Amiciprisma oder einen kurzbauenden Zenitspiegel aus dem Baader-Zubehörangebot verwendet, auf das/den der Binokularansatz mit eingesetztem Glaswegkorrektor direkt über das T-2-Gewinde aufgeschraubt wird. Ein solches Bauteil stellt jedoch eine nicht unerhebliche Zusatzinvestition dar.

In dieser Kombination kann man die wunderbare Welt des binokularen Sehens auch an diesem Instrument genießen. Auch hier wird die volle Abbildungsleistung des Fernrohrs erreicht. Ein kleineres Fernrohr eignet sich ja auch gut zur Landschafts- und Naturbeobachtung bei Tag. Die Anschaffung eines kurzbauenden Amici-Prismas (s.o.) für aufrechte und seitenrichtige Bilder mag deshalb ohnehin sinnvoll sein.

Technisches und Handhabung
Ich schließe das MaxBright II Binokular über den T-2-Anschluss an meinen Fernrohren an. Alternativ könnte auch der Zeiss-Mikro-Bajonett-Anschluss zum Einsatz kommen.

Die Okulare mit 1 1/4" Hülsendurchmesser werden mit ClickLock-Klemmen zentriert und sicher befestigt. Wichtig und hilfreich: An beiden Okularen ist durch Drehen eines Rings ein Dioptrienausgleich möglich. Das erlaubt optimale Fokussierung auch bei unterschiedlicher Kurz- oder Weitsichtigkeit der beiden Augen. Andere Fehlsichtigkeiten wie Astigmatismus werden am besten durch die Brille des Beobachters korrigiert. Dann ist bei der Auswahl der Okulare darauf zu achten, dass das Gesichtsfeld auch mit Brille komplett überblickt werden kann.

Alle optischen Flächen sind mehrfachbeschichtet und extrem reflexarm. Auch mit hellen Objekten im Gesichtsfeld habe ich keine Geisterbilder gesehen. Befindet sich ein sehr helles Objekt (etwa der Mond) knapp außerhalb des Gesichtsfelds, kann es zu schwachen Geisterbildern kommen, deren genaue Ursache ich nicht ergründet habe - denkbar wäre auch ein Reflex sonst irgendwo im Strahlengang.

Der individuelle Augenabstand kann zwischen 55 und 75 mm eingestellt werden. Bei mir sind es 70 mm. Dann passt der Nasenrücken noch gut zwischen die beiden Hyperion-Okulare. Bei Veränderung des Augenabstands bleibt der Fokus erhalten (im Gegensatz zu meinem alten 60 Grad-Binokular).

Das MaxBright II Binokular allein wiegt knapp 600g. Zusammen mit einem Paar Hyperion-Okularen, einem Prisma/Zenitspiegel und einem 2"-Adapter sind es bei mir schon rund 1700g. Das muss der Okularstutzen fernrohrseitig verkraften können, ohne dass er instabil wird, das Binokular nach hinten rausrutscht oder zur Seite wegkippt etc. Gegebenenfalls ist auch ein Gegengewicht vorzusehen, dass die Montierung nicht einseitig belastet wird.

Das MaxBright II Binokular macht einen sehr stabilen und hochwertigen Eindruck. Nichts wackelt oder lottert herum, die beweglichen Teile lassen sich sanft gegen einen angemessenen Widerstand bewegen. Die Parallelität der beiden Einblicke ist perfekt. Es wird in einem praktischen, gepolsterten Kunststoff-Köfferchen mit Platz für etwas Zubehör geliefert.
  • Das hervorragende Seherlebnis.
  • Auf den ersten Blick das Gewicht - aber größere Prismen und die entsprechende solide Mechanik darum herum haben nun mal ihr Gewicht.
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BillP 128/05/2020 08/05/202018:34
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MaxBright II Binoviewer
The MaxBright II system has performed flawlessly for me in the field and provided me with many memorable views of rich star fields, open clusters, double stars, galaxies, nebula, supernova remnants, the Moon and planets (Venus). Their compact size, moderate weight, solid build quality, precise mechanical function, well thought out ergonomics, plethora of available accessories, and excellent optical performance has actually made me a fan of binoviewing again -- binoviewers I have used in the past have always complicated the observing process due to multiple quirks in their operation. Another thing I really like about the MaxBright IIs is the flexibility of interfacing them to the diagonal in multiple ways allowing it to be easily system-ready to handle most any observing situation (e.g., conventionally using either a 1.25" or 2" nosepiece; directly to a T2 compatible diagonal using the included T2 Cap Nut Connector to use less of the telescope's precious backfocus; using the included Zeiss Micro Bayonet Connector to rapidly connect and disconnect the MaxBright II and other accessories from a Micro Bayonet compatible diagonal). The performance, ease of operation, and flexibility of the MaxBright II Binoviewer provided for me seamlessly executed and thoroughly rewarding observing experiences, whether using 1.25" eyepieces that produced sweeping low magnification wide field vistas, to those eyepieces that produced the highest magnifications possible for detailed lunar and planetary observations.
  • Ease of use. Well thought out function. Precision. Small size and weight. Fully illuminated view using a 24mm 68 degree wide-field or 30mm Plossl
  • Nothing!
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