Lumicon Deep Sky 1.25" filter

The best pollution filter on the light market today. block all high & low-pressure mercury and sodium vapor lamp light, neon lights, and airglow, while transmitting the remainder of OF the visible spectrum. Excellent for both visual and photographic applications. Visually, the Deep Sky filter is most useful more under light polluted skies, from where it reveals faint objects like star cluster, galaxies, nebulae and comets by darkening the background OF space. Photographically, the Deep Sky filter enables deep space photo ton through town center lights and of block natural airglow RKs taken dark sky sites, thus improving results in film and CCD astrophotography.