Astrozap Dew Heater – 3" Objective Telescopes (AZ-703) An Astrozap dew heater strap for telescopes with 3" objectives. It warms the optics slightly above ambient temperature to stop dew forming during an observing session.
Manufacturer model: Astrozap AZ-703 · Specifications checked against manufacturer data on 2026-11-03
An Astrozap dew heater strap for telescopes with 3" objectives. It warms the optics slightly above ambient temperature to stop dew forming during an observing session.
The heater needs an Astrozap D/C adapter (AZ-719) or the Astrozap dual-channel dew controller (AZ-720) to be powered; neither is included. Astrozap warns that using a dew controller of another brand can cause damage and void the warranty.
| Model | AZ-703 |
|---|---|
| Fits | telescopes with 3" objectives |
| Heater length | 12" (305 mm) |
| Power | 7.2 W at 12 V |
| Current | 0.60 A |
| Power source | AZ-719 D/C adapter or AZ-720 controller (sold separately) |
AZ-703. Requires AZ-719 or AZ-720 (not included).
Ficha técnica
Astrozap Dew Heater – 3" Objective Telescopes (AZ-703) An Astrozap dew heater strap for telescopes with 3" objectives. It warms the optics slightly above ambient temperature to stop dew forming during an observing session.
Manufacturer model: Astrozap AZ-703 · Specifications checked against manufacturer data on 2026-11-03
