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Old 01-06-2024, 04:18 PM
tim.anderson (Tim Anderson)
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Join Date: Nov 2014
Location: Cowra
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Celestron EdgeHD 8 inch dew heater ring

Does anyone use the Celestron 8-inch dew heater ring designed for the EdgeHD and RASA telescopes? If so, how have you found it?

I like the idea, given that it fits inside the scope's front opening, and runs off a standard 12V power supply, but I'm dubious that it can heat the whole of the corrector plate sufficiently well to keep the dew off on a humid night (and it gets plenty humid in winter hereabouts).

Any advice, experience or abuse welcome.

Last edited by tim.anderson; 01-06-2024 at 04:37 PM.
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Old 01-06-2024, 04:22 PM
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iborg (Philip)
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Join Date: Feb 2015
Location: Lynbrook, Australia
Posts: 638

I made something somewhat similar from resistors and found it works well.

The Celestron one looks a great idea, as a permanent install, mine sits in with Velcro.

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