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Moisture on primary mirror - frosty morning


 

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This morning there was heavy frost here in New Mexico, 22 degrees F, and while observing Jupiter at dawn I had to use a hair drier frequently ( on low setting, gently ). When I ended my session and was replacing the front cover lid I noticed that there was moisture on the primary mirror inside the scope.? I never noticed any moisture before on the primary mirror all through last year and I used the scope a lot.

I keep the telescope always in place outside under a telegizmos cover. It is never inside.

Is this common to have moisture develop on the primary mirror?? See moisture at arrows in pic.

I wonder if something changed ( unsealed or something? ) over the course of the year with my C14 Edge HD?

Thanks in advance for any replies.

Thomas



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