Celestron Origin Nebula Filter - 93669 Tele Vue Eyeguard Extender The one piece body construction

The one piece body construction also assures heavy TeleVue Telescope Eyepiece and TeleVue Telescope Accessories can't force the diagonal body to unscrew from the barrel as with other brands

there is no need to add a field flattener to this system

The holder is precisely machined to fit your eyepieces with a minimum of slop

iOptron CEM40 Center-Balance Go-To Equatorial Mount

Celestron Origin Nebula Filter - 93669 Tele Vue Eyeguard Extender The one piece body constructionNebula Filter & Holder for Origin Telescopes! Take advantage of the innovative filter holder built into the design of the Celestron Origin Nebula Filter and experience better contrast when viewing emission nebula like the Orion Nebula, the Lagoon Nebula and dozens more, especially in areas with light pollution! This specialized filter blocks 0. 5% of wavelengths that cause light pollution while allowing H Alpha (656nm), H Beta (486nm) and Oxygen III