Baader Planetarium 2 Inch Cool-Ceramic Safety Herschel Prism

Baader 2" Herschel prism for non-compromised solar observation.  A new technology for light and heat absorption.  Includes 2" Solar Continuum filter.

The Baader Herschel prism's mode of operation

The sunlight enters the telescope unfiltered.  On the back side, 4.6% of the light are deflected by 90 degrees.  The rest of the light is focused outside the Herschel prism.  This light's energy is very high and cannot be used for observation.

The Baader "Cool Ceramic Safety" Herschel Prism offers the best solution:

A special ceramic, developed for space technology, accepts the light energy without heating its environment so the prism housing can be kept closed and the risk of glare or fire is eliminated.

Easy positioning of the sun

A smart side effect of this ceramic screen is the possibility of centering the sun in the telescope easily.   Just place the sun spot in the middle of the ceramic screen and you can start observing

Both the Visual and the Photo version contain the same Herschel prism.  The difference lies in the different filter equipment.  The Visual model includes the 2" Neutral Density ND 3.0 and 2" Solar Continuum Filter.  The Photo version includes four 2" Neutral Density (ND0.6 / 0.9 / 1.8 / 3.0 and the 2" Solar Continuum Filter.

What kinds of telescopes can be used with the Herschel prism?

The Herschel prism is intended for frefractor telescopes without field flattener lenses on their back side.  The objective design (Doublet, Triplet, Air-Spaced etc.) is not important.  For all other kinds of telescopes we recommend a standard aperture covered solar filter.