Thread: SCT cooler
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Old 16-04-2006, 04:18 PM
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asimov (John)
Planet photographer

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Join Date: May 2005
Location: Bundaberg
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Yes, I care to comment. I had a practical demonstration of what happens when using a cooler in heavy dew situations/conditions. Call me stupid (most do, lol) But I should have thought about this from the get-go when I built mine. Used it for about 15 mins the other night & It suddenly dawned on me that, ok, if this cooler is sucking in air from a dew laden atmosphere.......??..........I grab a torch & shine it down the OTA........DEW!! On the inside! On the corrector & Primary. Luckily, only a very light coat of dew (due to 15 mins use) but had I kept using it for 2 or 3 hours??????? I don't wanna think about it. I haven't used the cooler since.

Luckily it was the only very dewy night we've had here. No experience with high humidity as yet, but yep! Don't use it on very dewy nights!!

I'm now trying to think of a filtering system for dew/humidity. Damn!
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