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Astromania Flexible Dew Shield for Telescope Front Outer Diameter from 203-221mm diameter-keep dew away and gives you clear observing for entire night
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Amazon.com : SVBONY SV192 Dew Heater Strip 560 mm Lens Heater Warmer for Telescope DSLR Camera Lens Outer Diameter Below 178mm : Electronics
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Amazon.com : Celestron – Deluxe Telescope Dew Shield – Flexible Dew Prevention – Fits 9.25" and 11” Schmidt Cassegrain and EdgeHD telescopes : Electronics
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