Thread: Dew questions
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Old 18-08-2020, 05:03 PM
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mental4astro (Alexander)

mental4astro is offline
Join Date: Jun 2008
Location: sydney, australia
Posts: 4,869
Hi Con,

For an SCT and Mak, and also refractors, there is a way of protecting the scope from dew and a way that allows you to use the scope WITHOUT needing to wait for it to cool down:

SCT and Mak total dew control without heat -a solution

A dewshield alone will not totally stop dew formation. Insulating the OTA will also extend the dew free period. But if dew formation conditions are heavy enough, then dew will form, and you will need a way to prevent dew from forming or drying it off. And of course, there will also be nights when dew won't form.

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