Smart DewHeater and Power Controller 4X
Price: $1,499.95 celestron.com
What we like
Heater rings directly contact corrector plate
Ability to monitor temperature, humidity and dew point
What we don't like
Only heater ports Works exclusively with Celestron telescopes and recent mounts.
WHAT IS THE BIGGEST impediment to observing with a telescope? Clouds? Light pollution? For many of us, it's dew. In many locations, you will have to deal with the wet stuff. If you use a telescope with a large, exposed optical element, like a Schmidt-Cassegrain Telescope (SCT) corrector plate, there will be many nights when dew quickly ends your observing session.
So, what to do about dew? The first step is a dew shield, an extension that attaches to the front end of the telescope tube. On humid nights, the corrector plate quickly falls below the dew-point temperature, encouraging moisture to form on the glass. A dew shield's job is to slow down the cooling of the corrector by creating a pocket of air between it and the heat-sucking sky, enabling you to observe longer.
As nice as
