Tyvärr har den här beskrivningen ännu inte översatts till svenska, så du hittar en engelsk artikelbeskrivning här.
Omegon H-alpha cut-off filter - for deep sky photography
Astrophotography under a light-polluted night sky can be difficult. The solution is an H-alpha filter. The Omegon H-alpha cut-off filter works to filter out a large part of this light pollution. This convenient filter only allows wavelengths above 650nm through, which means it blocks a large part of the scattered light and also blocks the light from artificial mercury and sodium-vapour lamps.
The Omegon H-aplha cut-off filter enhances the contrast between object and sky, allowing you to take good quality images even under urban skies.
