Telescope-Dew & Moisture Protection-Celestron 11″ Dew Heater Ring

Celestron 11″ Dew Heater Ring

Designed for 11″ SCT, EdgeHD, and RASA telescope tubes, this Heater Ring from Celestron improves observing and imaging by preserving a dew-free corrector lens in spite of the wetness of the surrounding environment. Installation is a snap and requires only that the retaining ring be permanently replaced with this ring so that it’ll always be there when you need it. Learn more about Celestron dew solutions in our comprehensive video below!

How It Works

Consisting of aluminum construction that is simultaneously durable and lightweight, this Dew Heater Ring enables more effective heating across the 11” Schmidt-Cassegrain’s corrector lens by taking the place of the plastic retaining ring. Both the corrector lens and any cable connections currently being used are fully supported by this dew ring and its rigid frame. Contrary to alternative heating bands or strips, Celestron Dew Heater Rings apply direct heat to the corrector glass instead of ineffectively warming the glass via the lens cell. This greatly improves heat transfer for preventing dew accumulation.

In spite of an atmosphere that’s saturated with dew, you can still adequately suppress dew accumulation by plugging this ring into an external source of 12V DC power. This will supply the steady stream of power required for this endeavor. Additionally, the Celestron Dew Heater Ring contains a pair of storage clips for keeping the power and thermistor jacks fixed while the telescope is not being used. Plus, even with these clips, the Dew Heater Ring is still able to fit the telescope’s dust cover.

The Celestron Dew Heater Ring also comes with a cable management clip that connects to the telescope’s front cell. Corral the power and thermistor jack to prevent them from dangling and reduce unwanted pulls on the cable connection to the rings.

Enhance Your Setup

To achieve the highest level of dew prevention while maximizing power efficiency, Celestron strongly recommends pairing the Dew Heater Ring with a Smart DewHeater Controller (sold separately). The controller uses the ring’s built-in thermistor and its internal environmental sensor to provide just the right amount of heat to the corrector to prevent dew based upon the ambient temperature, ambient humidity, and temperature of the Schmidt corrector, which can dramatically reduce the ring’s power draw, greatly increasing battery life. The ring also includes an extension cable for connecting the ring directly to one of the controllers’ heater output ports, or to a third-party controller’s heater output port. (Note: the ring’s integrated thermistor is only compatible with the Celestron Smart DewHeater Controllers).

Celestron also recommends adding a dew shield to your setup. While not mandatory, a shield will cut down on the amount of power the Dew Heater Ring needs to keep the optics clear.

Celestron 11″ Dew Heater Ring Highlights

• This Heater Ring prevents dew production by efficiently applying direct heat to the 11” SCT’s corrector lens.

• Permanent attachment to your current telescope provides both a stylish appearance and an accessory that’s impossible to leave at home.

• Integrated thermistor continuously monitors the temperature of the corrector lens when used with the Celestron Smart DewHeater Controllers.

• Made of tough and durable yet lightweight aluminum.

• Two storage clips and a cable management clip are included for organizing your cables.