Dew Heater Bands - (Various Sizes) Telescope Aperture Size:(250 - 271mm) Type: Interference filter

Type: Interference filter

Independent and stable tracking control can be achieved without the PC

Material: The guide tube and clamps are made entirely of metal

Due to their unique design

Long hole: Centric - length 110mm

Dew Heater Bands - (Various Sizes) Telescope Aperture Size:(250 - 271mm) Type: Interference filterIf the optics fog up, this normally means an early end to what could have been a successful astronomy session and there's nothing more frustrating for an Astronomer or Astrophotographer when this happens on rare crystal clear nights. Heater bands reduce the risk of dew on the lens or on the corrector plate by slightly heating the front lens of your telescope just slightly above the surrounding air temperature which prevents the dew settling on the