What is the Lumicon Deep Sky Filter all about?
The Deep Sky Filter is basically a general-purpose light pollution filter that restores a dark sky background for viewing and photographing deep sky objects from cities. It is the best light-pollution filter for all astrophotography on the market today. Visually, the Deep Sky Filter is the most useful filter under light-polluted skies, from where it reveals star clusters, galaxies and nebulae. Photographically, the Deep Sky Filter enables deep sky photographs to be taken from cities, and it blocks some of the natural airglow at dark-sky sites, thus improving deep-sky photographs taken from those locations. Mercury light pollution occurs at 365, 405, 436, 546, 577, and 617nm. High-pressure sodium streetlights emit at 570, 583, 600, and 617nm. The Lumicon Deep Sky Filter blocks all of these.
