Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp

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Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp

# 2456115

€ 450.00 Price excl. German VAT tax (19%): € 378.15

  • 2" BBHS star diagonal with 2" ClickLock terminal and black case. Provides greatest reflectance over most spectral range from 390 to 2000nm
  • New included item since 01/2020: Baader 2" Safety Kerf nosepiece with 2" filter thread (#2408156, € 41,-) with additional grip and security from inadvertent slipping. This 2" nosepiece replace the former included 2" standard clamp with undercut
  • Much higher in brilliance than standard dielectric coatings
  • BBHS = Broadband Hardsilver coating with dielectric protective overcoating
  • T-2 BBHS-Sitall zenith mirrors on both sides with T-2 Photo thread

Product Questions

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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)
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)
Forgive the question, but is there any update on projected availability of the product? Many thanks.
Question by: Joe Hudson on Aug 18, 2021 3:12:00 AM | 1 Answer(s)
I have an older 2" BBHS® Mirror Diagonal # 2456115 that fits into my Takahashi TSA-102. I would like to add a Baader Maxbright II binoviewer. Can the Clicklock be unthreaded to reveal a T2 thread? I saw somewhere about removing the small hex bolts (about 1 mm) that circle the side of the clicklock closest to the mirror. However, they seem impossible to remove as I can't find a tool that small. On the other hand the clicklock seems to be on very tight so I don't won't to force it if it is not threaded.
If it can't be removed I may buy a prism diagonal for very slightly better stray and scattered light performance. Do you think that this assessment of scatter is true?
Question by: Stephen on Oct 1, 2020 8:59:00 PM | 1 Answer(s)
What's the easiest way to attach the "Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp" to Televue NP127is and keeping the optical path shortest for Denkmeier Binotron 27 system?

Is there also a way how to add UFC to the path and keep somehow ClickLock detachable for the bino vs single eyepiece use?
Question by: Jan Somr on Jun 29, 2020 3:42:00 PM | 1 Answer(s)
Do you have a dimensioned line drawing available for the 2" BBHS mirror diagonal? I'm designing a carrying case for lenses and accessories and want to include room for the future purchase of this diagonal. Thanks.
Question by: Barry on Jan 26, 2021 7:31:00 PM | 1 Answer(s)
What is the best diagonal for a F10 SCT (Celestron 9.25 Evolution):
Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
If a focal Reducer/Corrector f/6.3 is used does the recomended diagonal change?
Question by: Antonio Vilela on Jan 26, 2019 1:20:00 PM | 1 Answer(s)
Can this diagonal be threaded direct to the 2" SCT back using the locking ring?
Question by: Mauricio on Jun 24, 2019 11:20:00 PM | 1 Answer(s)
How do you recommend cleaning the BHSS mirror diagonal? Do you have a recommended product and procedure?
Question by: Antony McEwan on Feb 7, 2021 8:40:00 PM | 1 Answer(s)
Is your mirror coated on the front of the glass on your Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp? As in a front surface mirror? Thank you! David
Question by: David on Sep 20, 2018 12:11:00 AM | 1 Answer(s)
I have a 1984 Celestron C11 and wish to use one of you Badder diagonals. Can I thread a Celestron focal reducer on to your diagonal or to the Badder adapter that fits my C11?
Question by: James A. Gibbs on Apr 5, 2019 3:54:00 AM | 1 Answer(s)
What diagonal would you recommend for a Takahashi TSA-102 (fl 816mm / F/8) a Baader 2" BBHS ® Mirror Diagonal or Baader 2" BBHS ® Prism Diagonal?
Question by: Ronald Bemelmans on Jan 30, 2020 9:57:00 PM | 1 Answer(s)
Can I use an UV/IR-Cut filter or the BBHS mirror in front of an H-Alpha or Calcium Solar Filter? Do you recommend the 2" BBHS or 2" Clicklock Mirror for solar observation?
Question by: Enrique V. on Sep 26, 2016 3:04:00 PM | 1 Answer(s)
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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Additional Information

Manufacturer Baader Planetarium
SKU (#) 2456115
Net weight (kg) 0.45
Optical Design Mirror Diagonal
Inner Connection (lens sided) Thread, M48, M55, 2" (50,8mm)
Outer Connection (lens sided) Barrel, Dovetail ring, S58, 2" (50,8mm)
Inner Connection (eyepiece/-camera-sided) Thread, Clamp, M55, 2" (50,8mm)
Reflection surface BBHS coated, Dielectrically protected
Image Orientation Erect image, Mirror inverted
Optical length (mm) 112
Clamping System ClickLock
Deflection angle 90°
Inner Diameter / Clear Aperture (mm) 47.5

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AstroBob 226/08/2021 15/08/202101:46
  • Rating:
Excellent for planets and DS but may be dangerous with Ha!
I use this with a few scopes from 80mm to 152mm APO refractors, 14
. 11" and 8" SCTs. I also have Astro Physics and a Hutech 2"
diagonals. The BAADER does give a bit more on planets and DS probably due to wider range of frequencies it passes. Oters have noted this also. is the scary part... I am also a solar observer. with Coronado Ha and Lunt Ha scopes, Day Star, Ha, and BAADER Cool Cermaic Hershel Wedge. I had planned on using my new BBHS BAADER diagonal with my favorite Ha setup but luckiily it wouldn't quite reach focus with some of my eyepieces due to a bit more back focus with the click lock (excellent device though normally). As a result I used my other two diagonals. About a year after buying the BBHS I happened to come across a warning email by BAADER that warned to NOT use the BBHS diagonals for Ha due to the additional radiation it apsses as a result of coatings. These could be dangerous to the user as well as equipment. While I love my BAADER equipment I think that warning should have been included in all product descriptions and user manuals. Here is the email I saw from BAADER:

Can I use a UV / IR blocking filter and / or the BBHS mirror before an H-alpha or calcium approach? Do you recommend the 2 "BBHS or the 2" ClickLock star diagonal?
-74Question by: Enrique V. on 10/14/2016 9:41:00 AM | 1 answer (s)
For observing the sun in H-alpha in combination with a suitable filter combination, we recommend the normal, dielectric Clicklock mirror, because below 380nm and above 740nm it conveys significantly less radiation into the eyepiece than the BBHS star diagonal. The star diagonal thus significantly reduces the load on downstream filters. Please always use a suitable energy protection filter in front of the lens in order to keep the strain on the filter as low as possible.

We strongly advise against visual observation of the sun through a calcium filter - the 397nm of the calcium line are in the UV; It is known that UV radiation can trigger photoxic reactions in the eye and lead to eye damage. In addition, even young people have only a low sensitivity to these wavelengths, which decreases even further with age. Therefore, the eye does not notice that the intensity is far too high. If you want to increase the intensity (for example with a different zenith mirror) in order to see a brighter picture, the risk of eye damage increases. According to the latest standards for eye safety and ophthalmological findings, the sun must not be visually observed at 397 nm.

We urgently recommend observing the sun in calcium only photographically, then no zenith mirror is necessary. We cannot understand why some manufacturers offer calcium filters for visual solar observation.

We also advise against placing a filter close to the focal point - an energy protection filter should be placed in front of the lens, even if high demands are placed on the optical quality of a large filter. A filter close to the focus saves money because it can be made much smaller, but we absolutely cannot recommend it - both because of our own conscience and because of EU regulations. The filter absorbs all of the energy that the lens collects - and could break at any time. For technical as well as ethical reasons, we can only recommend a dielectric energy protection filter in front of the lens.
Answer by: Baader Web Team (Admin) on 10/14/2016 9:43:00 AM
  • Supperior in every way for planetary and DS observing over competitiors. Clicklock is wonderful.
  • Warning not includeed in advertising or user manual about danger with Ha solar observing
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wallnerr 06/01/2020 07/01/202014:57
  • Rating:
Baader 2" BBHS Spiegel mit 2" ClickLock am TEC 1120/160FL
Die Kombination des TEC1120/160 FL mit dem Hyperion 36mm und dem 2" Spiegel ist unfassbar gut. Das Bildfeld ergibt den kompletten M42 Orionnebel, die kompletten M45 Plejaden und zb komplett NGC 869_884 H&Chi in einer Qualität, wie ich sie noch nicht gesehen habe. Jetzt spielt auch der TEC seine Qualität aus.Bis dato hatte ich Baader 2" Zenitspiegel. Die waren schon super. Aber die Qualität des Bildes hat sich mit dem neuen BBHS Spiegel nochmals extrem verbessert.
Ich glaube immer der Spiegel ist beleuchtet. So hell und klar ist das Bild.
Die Abbildung ist knackig scharf. Ich habe extreme Freude damit und kann diesen Spiegel nur weiter empfehlen.
  • die Qualität
  • Preis könnte etwas niedriger sein. Aber: Den Preis vergisst man, die Qualität bleibt.
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PwrHsePro 249/09/2019 07/09/201914:30
  • Rating:
Unfortunately weather and work prevents my giving a detailed review, however I can definitely give an initial impression over a few nights use of this extremely fine product.

There is somewhat of an undefinable quality using the BBHS over OEM and upgrade diagonals that is extremely pleasurable. While contrast and clarity are easy to spot in the rendition of stars and all objects, there is a very definite 'softness' or lack of harshness produced... very much like seeing with the naked eye. Without words, I guess I liken it to listening to music that was produced by warm analog means versus the harsh digital process.

I can easily vouch for the high quality and precision of the BBHS... and of course the Clicklock provides incredible convenience and safety.

Lastly, Tobias is a gem.... always there to help... extremely quick in response, even tho we have oceans between us.

Yes the product is a bit costly, however definitely not overpriced. If you are like me and truly appreciate the splendor of the heavens above, this product can help take you there.

Thanx Tobias... and Baader!
  • The pleasant, comfortable yet exacting view it allows.
  • It does not guarantee clear skies
    • @PwrHsePro Did you try the Ethos 21mm with this BBHS diagonal (#2456115)?I read a review on saying that the Ethos barrel is too long to fit in the ClickLock. Is that true?Thanks a lot
    • @Guest Hi!I dont recall... I do use the 21mm Ethos alot,but dont recall if I used it with the BBHS... I'll try to try that this weekend...
    • @JefferySHi, have you got the chance to try the Ethos 21mm in the BBHS diagonal?Thanks
    • @Guest , no, we had poor weather again last weekend... if you are looking for an answer to see if they items are physically compatible, I can try to check later today.The 21mm is my main eyepiece, and I dont recall a problem.
    • @Guest PwrHsePro - I just tried it and it seems to fit fine... I would upload a pic, but dont see that option.
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