Celestron Thermistor for Smart DewHeater Controllers - 94037 Mirror Diagonals making it usable with either

making it usable with either ALT-AZ or Equatorial mounts

contrast and sharpness during critical observations with high-end instruments

such as comets or asteroids

1 arcsecond Tracking Automatic Tracking Rate celestial

and lighter colored faculae

Celestron Thermistor for Smart DewHeater Controllers - 94037 Mirror Diagonals making it usable with eitherThe Celestron Thermistor is an accessory for the Smart DewHeater Controller (sold separately). It works in conjunction with a third party dew heating strip and allows the Celestron Smart DewHeater controller to deliver the right amount of warmth to your telescope's corrector to prevent dew while still preserving battery power. Please note that you do NOT need this thermistor if you are using a Celestron Dew Heater Ring. The dew heater ring already