Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)

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Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)

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€ 463.03 Price excl. German VAT tax (16%): € 399.16

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  • 2 ", 23 ° Safety Herschel Prism, utilizing special Phantom Group® coatings for glare control. 2” ClickLock® eyepiece holder.
  • There is no better and safer method for uncompromising sharp solar observation / photography in white light.
  • A special heat absorbing ceramic element traps radiant heat similar to the space shuttle heat tiles - without heating the surrounding area too. The fully enclosed housing adds to the safety and prevents the risk of glare.
  • Please choose version from dropdown to see scope of supply

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€ 463.03 Price excl. German VAT tax (16%): € 399.16

Product Questions

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Is this prism safe to use with a TeleVue NP127is refractor, which is a Nagler-Petzval design. In addition to the first objective doublet lenses, this has a second doublet at the focuser end of the OTA. Thank you.
Question by: Terry on Aug 23, 2019 6:55:00 AM | 1 Answer(s)
Greetings. I am having focusing issues with this product on a Televue NP 101 (non is) telescope. Are there adapters than can help with this?
Thank you.
Question by: Giuseppe Barbieri on Jun 11, 2017 3:47:00 AM | 1 Answer(s)
I have never used a Herschel Wedge before on my refractor--always mylar film, or glass filters on the forward end of the scope.
Will the unfiltered solar energy entering my(very expensive) air spaced triplet objective possibly damage the lens due to over heating? Could I use the wedge/and refractor continuously for 2 or 3 hours with out worry of damage to either? Thank you. Jon Mayer
Question by: Jon Mayer on Jul 11, 2019 5:59:00 PM | 1 Answer(s)
I wanted to know if the Herschel prism is recommended to use it with a D-ERF filter in front of the lens to prevent heat from entering and protect the tube? or the D-ERF is only recommended for use in H & alpha ??
Question by: Rafael Segura on Apr 21, 2020 9:37:00 AM | 1 Answer(s)
The documentation states that the Solar Continuum filter can be removed when using a fully apochromatic APO refractor*. What is implied is that a 1.8 ND filter should be substituted when doing visual observing – with of course the 3.0 ND filter still being in place. Please confirm.

If this is the case, please also clarify if the 1.8 ND filter should be placed where the Continuum filter was with the 3.0 ND behind it closest to the eye piece, the other way around with the 3.0 ND closest to the prism with the 1.8 ND closest to the eye piece, or whether it makes no difference.

*The documentation specifically mentions Astro Physics, TEC, and Zeiss. I am using a Tele Vue-85 which claims APO performance.
Question by: Herb H. on Jun 11, 2020 3:49:00 PM | 1 Answer(s)
Could you please let me know how to use this prism in conjuntion with 1.25" double stack cotinuum + polarizing filter + Maxbright II binos?. Thanks in advance.
Question by: Jose Carvajal on Apr 26, 2020 12:23:00 AM | 1 Answer(s)
Can I use the BDSF sunscreen at the same time, to protect my lens from televue 85, and then put the herschell baader prism?
Would it work well?
Question by: Francisco on Jun 4, 2020 6:35:00 PM | 1 Answer(s)


Baader 2" Cool-Ceramic Safety Herschel prism, Visual and photographic

There is no better way for uncompromising Solar Observation / Solar Photography in white light


Every Solar Diagonal needs additional neutral density filters since the reflected energy of the first surface prism (4.6%) still is a factor of 1000 too large for the human eye. All Baader Solar Diagonals are delivered with a pre-mounted ND 3.0 Baader precision 2” light reduction filter. The photographic version includes other ND-Filters to achieve shorter exposure times. Use with care!

  • Space-Technology: The exiting beam in the Baader Safety Herschel Wedge is fed into a heat cage separated from the prism body. Like on a Space Shuttle a ceramic tile forming the back end of the heat cage absorbs the radiant heat without overheating its surroundings. The closed prism body offers perfect safety for educational work.
  • Solar Finder: The translucent ceramic tile acts as projection screen for the unfocused image of the Sun. Aiming the telescope at the Sun becomes very easy.
  • ClickLock 2“ Clamp: Securely clamp any eyepiece with only the push of a lever. Change eyepieces single handedly – even in winter with heavy gloves.
  • Filter Holder: A 2“/M48 threaded ring couples the 2“ ClickLock-Clamp to the body of the Safety Herschel Wedge and acts as a filter holder for 2“ filters.
  • Solar Continuum Filter (10nm HBW/540nm CWL): Included as standard filter
  • Optional recommended accessories:2“ Baader Polarizer-Filter (# 2408342) mounts into any 2“ eyepiece or 2“ to 1.25“ reducer for adjusting image brightness simply by rotating the eyepiece. Reducer ring 2“to T-2 (#1508035) allows to mount any DSLR-camera T-mount directly on top of the Solar Diagonal body
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2 Item(s)

Michael S. 134/05/2020 14/05/202007:55
  • Rating:
Makelllose Sonne mit dem Baader Cool Ceramic Herschelkeil und 4 Zoll APO Triplett
Um mich für den kürzlich gestarteten 25. Zyklus vorzubereiten, habe ich mir den Baader Cool Ceramic Herschelkeil mit dem inkludierten 2 Zoll Solar Continuum und ND 3.0 Filter gekauft. Dieser soll dann in der hoffentlich bald aktiver werdenden Sonne zusammen mit meinem Skywatcher ESPRIT 100 und einer monochromen ZWO Asi Kamera Verwendung finden. Anbei ein kleines Mosaik aus 3 Teilen bestehend vom 9. Mai 2020, Mosaik weil ich eine kleine Barlow verwendet hatte.
Die einzige Herausforderung war das in-Fokus kommen, - dazu musste ich die 11/4 Zoll "Nase" der Kamera abschrauben, um möglichst nahe ranzukommen, sonst wäre es sich nicht ausgegangen.
  • Harmoniert sehr gut mit meiner monochromen Kamera. Sichere Beobachtung der Sonne im Kontinuum, bzw. der recht gute Kontrast.
  • -
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Robert 278/10/2017 06/10/201708:01
  • Rating:
Excellent for hard core solar observers & Photo
I use the photographic model for both visual and photography. I use it with a TV 85 APO refractor and a 152mm Officina Stellare APO triplet refractor.. I was concerned that my TV 85 APO wouldn't have enough in focus for photography. But with the removal of the Click lock and replacement with the Tmount adaptor and my Niikon DSLR it comes to focus with about 3/16" to spare on focuser travel. The other scope is no problem either.
Optically this is the ultimate for white light photography. I also have BAADER Astro Solar Film filters that up to now have been my choice. But the Hershel Wedge gives even better results with fine detail and nice crisp images without flare or ghost images. The Solar Conitinuum filter is designed to work with achromats but even APOs will benefit. Larger magnification images hold together extremely well..
The real question is whether the big difference in cost between the Hershel Wedge and BAADER Astro Solar Film is giving the best bang for the buck? If you are only an occasional observer, not a photographer, it may not be worth it. But if you are a hard core solar fan than I recommend it highly. By the way also have a Ha solar scope and while that is fantastic....the two views are very different. If you don't know what I am talking up on the differences and than you can decide if you want to get the wedge.
  • Construction and quality are laboratory grade, fantastic images visual and photo
  • Expensive but worth it if you are a solar fan
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