Celestron Dew Heater Ring - 5"

Efficient Dew Prevention: Direct 127.3mm Corrector Heating

Unlike conventional heater strips that warm the telescope's metal cell and hope the heat transfers inward, this Dew Heater Ring heats the Schmidt corrector glass directly. This method is far more efficient, using its 7 watts of power to keep the glass just above the dew point without wasting energy. The ring's 127.3mm inner diameter ensures perfect contact and uniform heating across the entire surface of your 5" SCT's corrector lens.

Permanent Integration: A 46.3 g Aluminum Ring Design

Engineered as a permanent, set-and-forget accessory, the Celestron Dew Heater Ring replaces your telescope's factory retaining ring. The lightweight aluminum construction adds only 46.3 g (1.63 oz) to your setup, having no meaningful impact on balance. Integrated clips secure the power and thermistor jacks when not in use, allowing the original dust cover to fit perfectly, while an included cable management clip prevents snags or accidental pulls on the connections.

7W Power with Integrated Thermistor Control

The ring operates on a standard 12V DC input via a 5.5mm/2.1mm barrel connector, drawing a maximum of 7 watts. For ultimate power efficiency, it features a built-in thermistor compatible with Celestron's Smart DewHeater Controllers. This allows the controller to monitor the exact temperature of the corrector lens and apply only the necessary power, dramatically extending the life of your field battery. A 6" extension cable is included to ensure a clean connection to any controller.

Celestron Dew Heater Ring vs. Traditional Heater Bands

For owners of 5" SCTs, the choice between this integrated ring and a generic heater strap comes down to efficiency and convenience.

• Heating Method: Traditional bands heat the exterior lens cell, leading to significant heat loss and inefficient warming of the glass. The Celestron ring's direct contact with the 127.3mm corrector provides immediate and targeted heat where it's needed most.
• Integration: Heater straps must be wrapped and unwrapped for every session. The Dew Heater Ring is a permanent installation, meaning it's always ready to go and you can't forget it at home.
• Smart Control: While some straps can be used with controllers, the ring's integrated thermistor offers a level of precision that external sensors cannot match, resulting in lower power consumption and clearer optics.