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Thousand Oaks 1 x 15 Heater Band for 2.5 to 4 Telescopes, used with DDHC Digital Heater Control Unit
Dew heater bands are used to prevent condensation on optical surfaces in cooler weather. The most common source of moisture is dew, however; moisture from your own eye can also condense on an eyepiece in extremely cold weather. When is comes to dew, the best defense is a good offense. Simply maintaining the temperature of your optical surfaces above the dew point will prevent condensation from happening. The most problematic optical surfaces, listed in order of their susceptibility are as follows 1) Corrector Plates on Schmidt-Cassegrain Telescopes, 2) Meniscus lenses on Maksutov Cassegrain Telesc

Price is $55.00
Price: $55