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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Orion Optics UK Dew Heater for Sec. 16″

Orion Optics UK Dew Heater for Sec. 16″

by Orion Optics UK
SKU OOUK-SECONDARY-DEW-HEATER-AG16-ODK16
$989.14 - $989.14
$989.14
$989.14 - $989.14
$989.14
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  • Prevents dew formation on secondary mirrors
  • Custom-designed for 16-inch Orion Optics UK telescopes
  • Essential for all-night imaging and observing sessions
  • Maintains optical clarity in damp conditions
  • Compatible with AG16 and ODK16 models
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Dew Heater for Sec. 16″

    The Orion Optics UK Dew Heater is the essential accessory for protecting the secondary mirror of your 16-inch AG16 or ODK16 telescope from moisture. Specifically engineered for these large-aperture systems, this heater gently warms the secondary optic just enough to prevent the formation of dew, ensuring your imaging or observing session is not cut short by changing atmospheric conditions.

    Protecting Your 16-inch Secondary Mirror

    In open-tube astrographs like the ODK16, the secondary mirror is highly exposed to the night sky and is often the first surface to collect dew. This heater applies a minimal, uniform amount of heat directly to the mirror's backing, keeping its surface temperature just above the dew point without introducing tube currents or degrading the high-precision figure of your Orion Optics UK primary.

  • Why is a secondary dew heater critical for a 16" Orion Optics UK telescope?

    Large, exposed secondary mirrors on open-tube designs like the AG16 and ODK16 have significant thermal mass and radiate heat quickly, making them highly susceptible to dew. A dedicated heater is the only reliable way to prevent moisture from condensing on the optical surface, which can ruin a night of imaging or observation.

    Will the Orion Optics UK Dew Heater for Sec. 16" cause tube currents?

    No, this heater is designed to apply very low, gentle warmth. When used with a proper dew controller (sold separately), it raises the mirror temperature only slightly above the ambient dew point, which is not enough to induce image-degrading thermal currents within the optical tube.

    Is this dew heater compatible with my 16-inch telescope from another brand?

    This heater is specifically designed for the secondary mirror mounts and dimensions of the Orion Optics UK 16-inch AG16 and ODK16 models. While it may physically fit other 16-inch systems, proper fit and thermal contact are not guaranteed.

    Do I need a separate controller for the Orion Optics UK Dew Heater?

    Yes, this is a heater element only and requires a dew heater controller to power it and regulate the heat output. Using a controller is essential for providing the right amount of power to prevent dew without overheating the optic.

    How does the Dew Heater for Sec. 16" help when imaging faint nebulae like the Cygnus Loop?

    Imaging faint, extended targets like the Cygnus Loop (NGC 6960, NGC 6992) requires long, uninterrupted exposures over many hours. The slightest bit of dew on the secondary mirror will scatter light, reduce contrast, and obscure faint detail. This heater ensures your optical surface remains perfectly clear from dusk until dawn, protecting the integrity of your data.

    How is the Orion Optics UK Dew Heater for Sec. 16" installed?

    Typically, a secondary dew heater is mounted to the back of the secondary mirror itself, inside the mirror holder. The power cable is then routed along one of the spider vanes to the outside of the telescope tube. Professional installation may be required if you are not comfortable disassembling the secondary mirror holder.

  • Compatibility Orion Optics UK 16" AG16 & ODK16 Telescopes
  • Orion Optics UK 1-Year Warranty