This full aperture Thousand Oaks R-G film solar filter fits Celestron 8” Newtonian Advanced Series reflector telescopes (C8N and C8N-GT). It has a 203mm/8” clear aperture R-G solar film filter element. The filter element is mounted in an aluminum cell with a 241mm/9.5” internal diameter to fit scopes with a maximum diameter of 239.7mm (9-7/16”).
You can custom fit it to scopes with an O.D. of 235mm (9.25”) to 239.7mm (9-7/16”) by using the extra supplied self-adhesive felt.
Always remember to install the solar filter before pointing your telescope at the Sun to avoid instant and irreversible damage to your eyesight.
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