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Filters


Filters
Astronomical filters enhance the appearance of specific targets.

Lunar and Planetary Filters

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Lunar and planetary filters reduce brightness and glare, and reveal subtle detail that is lost when one color dominates the object.

Nebular Filters

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Nebular filters serve to increase the contrast and detail visible in emission nebulae.

White Light Solar Filters

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White light filters allow one to observe sun spots or any dark object passing in front of the sun.

Hydrogen-Alpha Solar Filters

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Hydrogen-alpha filters take solar observing to an entirely new level by revealing prominences around the solar limb and texture on the solar disk itself.

Calcium-K Solar Filters

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Calcium K filters are used to study an emission line from a layer of the chromosphere that is slightly lower and cooler than the layer viewed in Hydrogen-alpha.

Solar Filters - Other Wavelengths

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Helium D3 and Sodium D filters are used by researchers and professional solar observatories to study different layers of the chromosphere.