Here is a Celestron LPR 93568 (light pollution reduction) filter for Schmidt Cassegrain telescopes with 48mm rear threads. This filter was used very little and will preform as new. If you live in a light polluted area, as most of us do, you will be amazed at the differense it will make on those dim fuzzy targets such as nebulas and galaxies.
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Thanks for your bid.
Filed under: Eyepieces & Accessories