Baader CoolCeramic Herschel Wedge Solar diagonal
 Baader CoolCeramic Herschel Wedge Solar diagonalBaader CoolCeramic Herschel Wedge Solar diagonal 

Baader CoolCeramic Herschel Wedge Solar diagonal

  (3 Reviews)
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About this product

Model:  baader-herschel-wedge-2956500-V
Part Number:  2956500V

The Baader 2" Herschel Safety Wedge Solar Prism provides high contrast detailed white light solar views. 

  • For use with refractor telescopes only.
  • Superior in resolution and contrast to the best glass objective filters around.
  • Provides a true white-light view, does not filter any visual wavelengths.
  • Uses precision 2" Zeiss wedge prism and incorporates a permanently pre-installed ND=3.0 filter in the wedge housing.
  • Waste energy is sent through Baader's innovative Light Trap.
  • Features Baader's 2" ClickLock eyepiece clamping mechanism.

This latest version incorporating an innovative Light Trap developed by Baader Planetarium brings the Herschel Wedge into the 21st Century, by rendering the output energy cool and diffused! In all other Herschel designs, the waste energy is simply deflected out of the rear face of the prism by an angled mirror. Though quite safe with careful use, the user still had to be aware not to place any object (or body part..) into this output beam (and to prevent any casual onlooker from carelessly staring up into the beam). Thanks to Baader Planetarium, this concern has now been completely removed. In place of the typical output mirror is a coated multi-layered perforated steel screen. The bright light and heat energy are harmlessly diffused. Even after prolonged observations through large refractors, the light trap remains cool. You can even place a hand below the output and no heat can be felt (also, no tempting hazardous bright light output for careless eyes to see).

Baader CoolCeramic Heat Cage!

The Solar light enters into the prism body and falls onto a 45° inclined prism surface. Approx 4.6% of Solar light is reflected into the eyepiece or camera respectively. The much larger percentage of light (95.4%) is fed into a separate “heat cage” which includes a special heat-absorbing ceramic tile. Like on a space shuttle the ceramic tile traps the radiant energy without overheating its surroundings. The body of the Baader Safety Herschel-Prism is closed on all sides which prevents any danger of contacting direct Sunlight, making it safe for educational work. Since the “heat cage” is separated from the prism body and connected only with four screws, there is virtually no heat distribution extended into the prism itself.

The translucent ceramic tile also acts as projection screen showing an unfocused image of the Sun so aiming the telescope at the Sun is now easier than ever before.

Baader offers two versions of their Herschel Wedge:

Visual V

The Version-V for visual use comes with a pre-installed ND=3.0 (required for safe viewing) filter and a 2" Continuum Filter.

Photographic P

The Version-P for photographic use is essentially the Version-V with three additional Baader ND filters (ND1.8, ND0.9 and ND0.6). The additional filters are handy for further dimming the image for white light viewing, or attaching to eyepieces or a T2-15 Reducer, and are particularly useful for imaging.

All of the fine-optically polished genuine Baader ND filters incorporate special anti-reflection multi-coatings to minimise light scatter and ghosting for maximum image contrast. The result is image quality unachievable with any other ND filter.

Baader Herschel Wedge Instructions and safety information.


1. The Baader Herschel Wedge must only be used with Refractor telescopes with metal and glass construction, not plastic. Telescopes with apertures 70-120mm work particularly well. Larger apertures can cause the rear heat trap to become uncomfortably hot.

2. Not suitable for use with Petzval or other telescope designs with a rear lens element positioned close to the focuser drawtube.

3. Due to production standards, the 2“ nosepiece in front of the Baader Safety Herschel-Prism features a 2“ (M48) filter thread. However - never mount a 2"“ filter in front of the Baader Herschel Wedge! Any filter mounted into the full beam of Solar energy so near to the focus point will become extremely hot and damaged within seconds (see safety advice, page 3 in manual). Filters must only be mounted above the exiting side of the prism.

4. Solar observing is dangerous and can be hazardous to eyesight. Safety is everyone’s responsibility, please use the correct equipment and read the safety notes supplied with the products carefully.


Customer reviews

Average Rating (3 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
The best wedge available on the market and good for scopes up to 150mm
Thursday, 28 October 2021  | 

Using a wedge produces a a very sharp white light view of the sun and hopefully the sun spots - becoming more frequency in cycle 25.

The advantages of this wedge are that it has the Continuum filter - looks very sharp and contrasty.

Has additional filters for varying the ND - especially good for photography.

Construction is typical of Baader - well thought through and to a high standard, plus...

The cool back does stay very cool and the glow of the sun aids with alignment. Other wedges have only a metal disc that can get quite hot or don't have the same angle that this wedge.

The 2" wedge for larger scopes is particularly good value as it includes the green filter and the extra ND filters are ordinary very expensive to buy.

Baader are very good at answering questions and the dimensions are noted in their description.

As a way into white light and solar imaging/viewing this goes quite a long way for a modest cost.

The product is particularly safe. The wedges don't break, but if they did it wouldn't direct light into an EP. Baader takes safety very seriously so it can be used safe in the knowledge that it is totally safe.

Packaging is also to a high standard.

If your scope can manage a 2" diagonal (longer path length than a 1.25" diagonal) and is OK for visual and imaging then this would be a very good choice.

Rating (max 5):  
Class piece of kit
Saturday, 16 October 2021  | 

This is one beautifully made piece of kit and well worth the money which turns my ordinary refractor telescope (Rother Valley Optics 72mm) into a white light solar telescope without the fear of overheating.

Rating (max 5):  
A superb white-light solar filter
Wednesday, 23 May 2018  | 

I bought this for my Tak FC100 DF, and it works superbly. The 2" size and ceramic-based design allow for a nearly complete heat dissipation. The image quality is also outstanding, particularly at high magnifications, assuming decent seeing conditions.


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