For sale: Orion SkyGlow™ Broadband Filter, 2" SCT format. An Effective Weapon for Combatting Bright Skies, Bad Contrast
Our SkyGlow is an advanced multilayer "interference" filter designed to enhance deep-sky observing in moderately light-polluted skies. It blocks the most common wavelengths of light pollution - predominantly produced by mercury vapor lamps - and allows higher transmission of critical hydrogen-alpha and hydrogen-beta lines. Bright, light-polluted skies appear much darker in the field of view and contrast significantly enhanced, particularly emission nebulas like the Orion and Lagoon. Views of galaxies and clusters are also improved. Filter has been used less than 5 times, so it is in pristine condition.
Orion sells these filters with the new lower price for $69.95 + $6.95 shipping. You can have this filter for $55 shipped.
Thanks for looking.