Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp

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Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp

# 2456117

€ 505.00 Price excl. German VAT tax (19%): € 424.37

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  • 2" BBHS prism star diagonal (BaK4 glass) with 2" ClickLock clamp and black case.
  • Including Baader 2" Safety Kerf nosepiece with 2" filter thread (#2408156 , € 43,-) with additional grip and security from inadvertent slipping.
  • Provides greatest reflectance over most spectral range from 390 to 2000nm
  • BBHS = Broadband Hardsilver coating with dielectric protective overcoating
  • Much higher in brilliance than cheap dielectric coatings

Product Questions and Answers

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Tell me, please, what is the best diagonal to choose for observing objects of distant cosmos and planets:
Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
And yet, the mass of them is indicated the same, is there any error here? The prism should be heavier? Thank you for your responses!
Question by: Evgeniy on Mar 28, 2017 8:13:00 PM | 1 Answer(s)

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PRISM-2Z 2456117 (2 inch diagonal with zeiss prism) I have a Celestron Evolution 9.25, with 2" visual back. Can I remove the nose piece and screw this diagonal directly onto my 2" visual back and use the lock ring LRING 2458270? Thank you. Jeff
Question by: Jeff Melcher on May 28, 2018 5:36:00 PM | 1 Answer(s)

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Are the BBHS coatings easy to clean? Do the coatings have a life comparable to your dielectric coatings? Do the coatings degrade over time and at what rate? Is there a difference in performance between your dielectric diagonal and the BBHS one, what are the differences and are they significant or very slight? I own an early Televue APO 4 inch refractor.
Question by: John on Sep 9, 2016 1:29:00 AM | 1 Answer(s)

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Does the diagonal have an eyepiece stop?
Question by: Jan on May 25, 2018 5:17:00 PM | 1 Answer(s)

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What is the outside diameter of the nose piece? The precise inside diameter of the focusing tube on my refractor is 2.000 inches at 20 degrees Celsius +/- 0.001 inches. If it turns out that the nose piece is also exactly 2 inches, I could turn the nosepiece on a lathe. Your thoughts? What nose piece diameter would you suggest, if I had to turn it on a lathe?
Question by: John Aviste on Oct 12, 2016 9:30:00 PM | 1 Answer(s)

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I have a Celestron CPC 1100 EdgeHD and I am undecided between this BBHS prism diagonal or the similar mirror BBHS version.
Which one would you suggest for this sct f10?
Question by: Emilio on Mar 20, 2022 4:19:00 AM | 1 Answer(s)

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Is the prism in this diagonal (#2456117) a Carl Zeiss spec prism?
Question by: Brian on Jul 12, 2017 4:56:00 PM | 1 Answer(s)

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I have this diagonal, I need to clean it, can it be disassembled without losing the "90° collimation"?

Would it be appropriate to use your baader optical wonder liquid and your microfiber after blowing with a blower?
Question by: Antonio on Sep 20, 2023 6:33:00 PM | 1 Answer(s)

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It it possible to use a Morpheus eyepiece with an attached 1.25 single polarizing filter (or any other similar size Baader 1.25 filter) together with 2456117 prism, when the eyepiece is inserted in the ClickLock via its 2" barrel? Or is there not enough space between and the filter would touch the prism?
Question by: Lukas on Jan 17, 2023 12:32:00 AM | 1 Answer(s)

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How can best I attach the Baader 2" Prism Star Diagonal (#2456117) to my C8 Edge HD? The native back focus of the C8 is 133m, and the diagonal has already 100mm which doesn't leave a lot for barlow or reducer attachments? Thank you
Question by: Christoph Mues on Mar 20, 2021 8:46:00 PM | 1 Answer(s)

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Do the Baader prism diagonals with BBHS coating work well with refractors faster than f/7 or f/8? I am wondering if chromatic aberration (or spherochromatism) would be a problem as the light propagates through the glass prism.
Question by: Brian on Jul 13, 2017 4:00:00 PM | 1 Answer(s)

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How come the BBHS 2" Prism ClickLock diagonal has 100mm optical tube legnth, while the seemingly identical mirror BBHS diagonal has 112mm? Is that an error?
Question by: Jan on May 25, 2018 4:19:00 PM | 1 Answer(s)

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Does the 2" nose-piece accept standard 2" filters such as Lumicon UHC? If not, what adaptor would i need?
Question by: John on Nov 17, 2016 1:23:00 AM | 1 Answer(s)

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I already purchased this beautiful prism. Now I would like to attach the Giant Bino Mark V. How can this be done directly? With a 2"-Quick Changer ? If not yet, will you make them soon?
Or better: a Self Centering Adapter version ClickLock-QuickChanger. 2" and T2.
Question by: Arthur on Dec 28, 2016 4:28:00 PM | 1 Answer(s)

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Additional Information

Manufacturer Baader Planetarium
SKU (#) 2456117
EAN Code 4047825033956
Net weight (kg) 0.51
Optical Design Star Diagonal Prism
Inner Connection (lens sided) M48, 2"/SCT Thread (50.8mm), M55
Outer Connection (lens sided) ø 2" (50.8mm), S58
Inner Connection (eyepiece/-camera-sided) ø 2" (50.8mm), M55
Reflection surface BBHS coated, Dielectrically protected
Glas path 50 mm
AR-Coating Phantom Coating® Group
Image Orientation Erect image, Mirror inverted
Optical length (mm) 100
Clamping System ClickLock
Deflection angle 90°
Inner Diameter / Clear Aperture (mm) 47.5

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Ingo Küttner 273/09/2020 30/09/202020:15
  • Rating:
2" BBHS ® Zenitprisma oder der Schärfe/Kontrastbooster, ein top visuelles Erlebnis
Das Prisma wird an einem Takahashi FC-100 DZ f/8 eingesetzt. Es wurde ein Vergeich zu einen dielektrisch vergüteten 2" Zenitspiegel mit 99% Reflektionsvermögen der Firma TS am Planet Jupiter, der ca . 16 Grad im SW hoch stand, durchgeführt. Seeing wurde mit 4/5 angegeben, windstill.

Bei Vergrößerung bis 200x konnte man am Jupiter mit Hyperion Okularen beide Wolkenbänder erkennen. Das dritte schwächere oberhalb (oder unterhalb?) war im indirekten Sehen wahrnehmbar. Das war der Eindruck mit dem besagten Zenitspiegel.
Nun wurde das Prisma anstelle des Zenitspiegels eingesetzt. Der erste Eindruck .... "Was ist das denn ... dass ist ja unglaublich..."
Die beiden Wolkenbänder zeigten Strukturen und Ausbeulungen am Rand. Das dritte Wolkenband kam klar und sicher rüber. Der Kontrast war unübersehbar besser. Der Gesamteindruck war ein schärferes, absolut kristallklares und kontrastreiches Bild. Ein Schub an Details, was ich so nicht vermutet hätte.
Wohlbemerkt, ich hatte da noch nicht einmal ein Nagler oder Takahashi LE oder TOE Okular zur Hand.

Ein Test am Doppelstern Albireo und Lyr epsilon war ebenfalls überzeugend. Albireo kommt nochmal fantastischer in seinen Farben rüber. Bei Lyr epsilon hat man eine Trennung gesehen, die sowas von klar war, wie ich es noch nicht gesehen hatte. Refraktoren sind ja für die nadelfeine Abbildung von Sternen bekannt, hier habe ich gefühlt eine nadelnadelnadelfeine Abbildung wahrgenommen.

Dann der Rotationstest. Im Zenitspiegel wandert das Bild aus der Mitte bei der Rotation des Spiegels imOAZ. Im Prisma hingegen nicht. Also auch die mechanische Verarbeitung ist beim Prisma genauso hochwertig wie die Abbildung.

Wer also seine sehr hochwertige Optik mit einem herkömmlichen (und doch qualitativ guten) Zenitspiegel betreibt sollte sich dieses Prisma antun.
Ich freu mich schon auf die anderen Planeten, allen voran den Mond.

  • Wertige Verarbeitung, Produktbechreibung stimmt 1:1
  • Ich habe lange gesucht und nichts gefunden ;-)
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Mike 39/02/2016 09/02/201611:22
  • Rating:
Excellent piece of kit
Premium prism diagonal delivers excellent performance with the security of ClickLock.
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