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.
Return From Lumicon Hydrogen Alpha Filters To Lumicon Filters Main Page Telescopes Home Page