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Dew Heaters
Grr,
I keep getting my astro shots lost to dew. I guess the problem will be around for the whole of winter so I want to do something about it.
Sorry if this has been covered before but what solutions are you using out there? Are you happy? Should I buy or build? I need to keep a 90mm OTA and a 58mm camera lens fog free and a passive shield is not enough...
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