Primary Fans and Dew
I have a RC scope with primary fans. They draw air from open front of the scope, over the mirror and out through the back. Do these fans in any way delay dewing, or are they just for cooling the mirror down to ambient? If I put a dew strap around the tube near the mirror, And the fans are running, won't the constant flow of cool air negate its effect? So in a 'dewy' environment should I turn the fans off and just rely on the dew strap? The scope is in an observatory so is generally at ambient temperature.
Graham
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