William Optics STC Astro Duo-Narrowband Filter - 48 mm - YF-STC-ADN Celestron 2“ BARREL (MM) 21 mm

2“ BARREL (MM) 21 mm SLIP PROTECT SAFETY Safety Kerfs EYEPIECE BODY ABOVE REFERENCE PLANE (MM) 95mm LENGTH OF 1¼" BARREL (MM) 24 mm LENGTH OF 2" BARREL (MM) 21 mm OUTER DIAMETER 55 mm OPTIONAL ACCESSORIES Dustcap Storage Holster SPECIAL FEATURES Photo-luminescent engraving: lets you find the correct eyepiece at all times INCLUDED ACCESSORIES Cordura eyepiece holster for fast access OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread

the CGEM II motor drive system accurately tracks during an exposure

25" Round Mounted Specifications

6 Truss-Tube Dobsonian is their largest aperture telescope

Interior: Foam

William Optics STC Astro Duo-Narrowband Filter - 48 mm - YF-STC-ADN Celestron 2“ BARREL (MM) 21 mmWilliam Optics STC Astro Duo Narrowband Filter 48 mm TC Astro Duo Narrowband Filter from William Optics 48 mm Size Clip Filter Dual Band type Light pollution type filter Enhances H alpha and Oxygen III wavelengths Professional Ion Beam assisted deposition and AR coating technology This is a William Optics STC Astro Duo Narrowband Filter 48 mm size. STC Astro Duo Narrowband filter can reduce the interference from artificial lighting (man made light