Astro Systems Secondary Dew Guard 3.5" to 6.0" Secondary Mirrors - DG3

$58.00
Article number: DG1
Availability: More on the Way to us
Delivery time: More on the Way to us

AstroSystems amazing Dew Guard secondary heating system attaches directly to your secondary mirror and then automatically senses the air temperature and the mirror temperature, then maintains the secondary mirror at a preset (adjustable) temperature above the ambient air temperature. It gently warms the secondary with 2-4 watts when on full and has 4-8 evenly spaced contact points for optimum thermal distribution. Uses any external 12 volt dc supply or you can run on a 9v battery in a pinch. No more heat ropes!

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