CELESTRON SMART DEWHEATER CONTROLLER f/4 Oxygen-III and Sulphur-II narrow-band filters

Oxygen-III and Sulphur-II narrow-band filters boost the contrast of emission nebulae and supernova remnants for professional results

The insert barrel is threaded to accept 1

centre-positive

# 30A117 - for telescope tubes 370 to 520 mm in diameter

75) and Zeiss micro bayonet connections to allow low-profile adaption to many common threads

CELESTRON SMART DEWHEATER CONTROLLER f/4 Oxygen-III and Sulphur-II narrow-band filtersThe Celestron Smart DewHeater 2x is an advanced two channel dew heater controller that uses realtime data to provide enough heat to prevent dew forming on your optics. The Smart Control system monitors the ambient outside temperature and humidity and automatically adjusts power to the dew heaters, using just enough power to keep the optics above the dew point while maximizing battery life. Natively compatible with Celestron Dew Heater Rings as well as