Solar Spectrum

Solar Spectrum: Professional H-alpha solar filters

Experience the sun in impressive detail and exceptional sharpness

For observing in H-alpha light, Baader Planetarium offers SolarSpectrum Optical Filters in the range of 0.3 to 0.8 Angstrom FHWM. These are temperature controlled H-alpha-filters (lambda = 656,3 nm) with electronic temperature control (combined heating and cooling!)

The american company Solar Spectrum Optical Filters has been producing ultra narrow optical filters for observing the sun, ranging from the professional to the amateur alike. The popular Solar Spectrum H-alpha filters are only one of the many wavelengths Solar Spectrum Optical Filters provide.

Solar Spectrum H-Alpha Filters give you an incomparable view of our Sun's eruptive surface. The SolarSpectrum filters follow the classical design and are placed behind the telescope in the focuser.  In combination with a telecentric system tuned to the focal length of the telescopic, between 2/3s of the aperture and the full aperture of the telescope can be used with most refractors and SC telescopes, depending on the telescope's f/ratio!

Other narrow-band H-alpha filters are placed in front of the telescope lens. They are avaiable at affordable prices only up to 90mm diameter. For larger telescopes, the aperture of the telescope is stopped down by the filter. This reduces both light gathering power and resolution of the telescope dramatically!

Further information about the First class H-alpha Solar Fitlers by Solar Spectrum can be found here

You can read more about H-alpha observing and photography on our website www.astrosolar.com: