Coronado has been developing ultra-narrowband, hydrogen alpha filters and associated technologies for the professional market for over 40 years. Coronado solar filters and solar telescopes allow you to safely observe and photograph the sun. The red light of hydrogen alpha is a very prominent feature in the solar light spectrum since hydrogen makes up 75% by weight of the outer layers of the sun.

About Coronado H-A filters...

The most effective method of viewing the sun is by isolating the Hydrogen Alpha wavelength at 656.3nm and rejecting all other types of light. At this wavelength you are able to view all the features of the chromosphere, which originates just above the photosphere. These features include flares, prominences, filaments, spiculae, faculae, and active regions. As the sun is constantly changing, the view through a Coronado filter is always new and exciting. Whether you watch a sunspot group march across the surface or a prominence explode thousands of miles into space there will always be something unique to view through our filters. Please see our photo gallery for examples of photos taken with each Coronado filter. Complete safety specifications for this equipment, and test results provided by independent laboratories, are available from Coronado on request.

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