Celestron

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The Celestron Dew Heater Ring - 11-inch is a very user-friendly dew control system for your Celestron schmidt-cassegrain telescope.  To install this dew ring, remove the plastic retaining ring on the OTA, and replace it with the Celestron Dew Heater Ring. This ring will prevent dew formation that occurs on cool observing nights by providing a constant flow of heat to your corrector plate. The Celestron Dew Heater Ring comes in a variety of sizes, suitable for all ranges of the Celestron Schmidt-Cassegrain series.  For optimal performance, combine the Celestron Dew Heater Ring with the DewHeater Controller system (sold separately) which enables the user to control the temperature of your system. However, it can be used independently.    The Celestron Dew Heater Ring - 11-inch is compatible with the following telescopes:  - Celestron C11-A-XLT SCT Telescope OTA (CGE) - Celestron EdgeHD 1100 OTA - CGE - Celestron RASA 1100 - CGE - Celestron CPC 1100 GPS - XLT Schmidt-Cassegrain Telescope - Celestron CPC Deluxe 1100 EdgeHD Computerised Telescope - Celestron CGX 1100 Computerised Cassegrain Telescope - Celestron CGX 1100 EdgeHD Computerised Cassegrain Telescope - Celestron CGX 1100 RASA Computerised Telescope - Celestron CGX-L 1100 Computerised Cassegrain Telescope - Celestron CGX-L 1100 EdgeHD Computerised Cassegrain Telescope Specifications Max Power 30 watts Power Jack 12V DC barrel connector, 5.5mm/2.1mm, tip positive Ring construction Aluminium Power Jack Extension Cable 6" long, 12V DC, 5.5mm/2.1mm barrel connector on one end, male RCA connector on other end, tip positive Thermistor Jack 2.5mm audio jack, compatible with Celestron Smart Heater Dew Controllers Compatibility 11" Schmidt Cassegrain, EdgeHD, RASA Internal Diameter 279.4mm External Diameter 305.3mm Weight 133.0g   About Celestron Celestron was founded by Tom Johnson whose first telescope design was a simple 6-inch reflector, built for his young son. He gradually progressed to making larger scopes in more sophisticated designs. Today, the Celestron company is an industry leader in designing and manufacturing optical equipment including telescopes (computerised and non-computerised), binoculars, spotting scopes and its accompanying accessories. Celestron's legacy spans 50 years, and has grown to enjoy recognition from amateurs to serious astronomers globally. The company seeks to remain innovative by growing its product offerings, while supporting science education around the world. Product Code: 94053