William Optics STC Astro Duo-Narrowband Filter - 48 mm - YF-STC-ADN Celestron Provides extra comfort when higher

Provides extra comfort when higher elevation is needed for observing purposes

Interior: Foam

46 mm x 50

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William Optics STC Astro Duo-Narrowband Filter - 48 mm - YF-STC-ADN Celestron Provides extra comfort when higherWilliam 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