![Thousand Oaks Optical’s Digital Dew Heater Control Unit](https://www.astronomy.com/wp-content/uploads/sites/2/2023/02/thous_oaks_dew_cntrl_900.jpg)
Thousand Oaks Optical’s Digital Dew Heater Control Unit features 4-channel operation and a battery-saver function.
Astronomy: William Zuback
The best way to avoid dew — or ice — on optics is to use a dew heater.
The best way to avoid dew — or ice — on optics is to use a dew heater.