Lumicon Hydrogen Alpha Filters

Lumicon's Night Sky Hydrogen Alpha Filters are available in 1.25",58mm,72mm,77mm and 82mm. They are long-pass filters with a 50% transition from blocking to passing at about 640nm.

At wavelengths longer than 650nm, transmittance is 90% or above.

The filter is used as an extreme anti light-pollution filter, and for contrast-enhancement of emission nebulae and other astronomical objects bright in the infrared.

The LF3085, 1.25" Night Sky Hydrogen-Alpha Filter, threads into the nose-piece of industry-standard 1.25" Digital Imagers.

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