Orion 5660 1.25-Inch SkyGlow Broadband Eyepiece Filter The SkyGlow filter enhances deep-sky observations in moderately light-polluted skies Broadband filter blocks the most common wavelengths of light pollution for increased contrast and better views SkyGlow eyepiece filters improve views of nebulas, galaxies as well as open and globular star clusters 1.25" filter with metal filter cell construction compatible with all 1.25" Orion telescope eyepieces and filter-threaded 1.25" accessories