CELESTRON SMART DEWHEATER CONTROLLER f/4 # 30A117 - for telescope

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

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

the SunDancer II provides exceptional resolution

The secondary mirror is oversized in order to have a fully illuminated field and to avoid any vignetting

CELESTRON SMART DEWHEATER CONTROLLER f/4 # 30A117 - for telescopeThe 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