Skip to content
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.
Dew-Not Heater Strip - Telrad Heated Shield

Dew-Not Heater Strip - Telrad Heated Shield

by Dew-Not
SKU DN018
$43.00 - $43.00
$43.00
$43.00 - $43.00
$43.00
Price Match Policy!
  • Custom-fit for Telrad finders
  • Efficient 1.44W power consumption
  • Operates on standard 12V DC power
  • Draws only 0.12 A of current
  • Slides on for easy installation
Only 4 left!
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • Warranty

  • Dew-Not Heater Strip - Telrad Heated Shield (DN018)

    The Dew-Not DN018 Heated Shield is engineered to eliminate dew from your Telrad's viewing window using just 1.44 watts of power. Operating on a standard 12V DC input, this heater draws a minimal 0.12 A, ensuring your Telrad remains clear without significantly draining your field battery.

    1.44W Thick-Film Heater: Even Heat, Low Power Draw

    Unlike resistance wire heaters that can create hot spots, the Dew-Not DN018 uses an advanced thick-film heating element. This technology distributes heat more evenly across the surface, gently and efficiently raising the temperature of your Telrad's glass just above the dew point. The result is a consistently clear view without risking damage to the finder or introducing tube currents.

    12V DC Operation for Seamless Telrad Integration

    Designed specifically for the Telrad, this heated shield slides directly into place for a secure fit that won't disrupt alignment. It connects to any standard dew controller (sold separately) via its integrated cord and molded RCA jack. With a low current draw of just 0.12 A, it integrates easily into any 12V DC astronomy power system.

  • What do I need to power the Dew-Not DN018 Telrad Heated Shield?

    You will need a 12V DC power source and a dew heater controller. The heater connects to the controller via a standard RCA-style plug. The controller, which is sold separately, allows you to adjust the heat output to match changing environmental conditions.

    How is the Dew-Not Telrad heater installed?

    Installation is simple and requires no tools. The Dew-Not DN018 is designed as a shield that slides directly onto the body of your Telrad finder. Its custom-fit design ensures it stays in place without affecting the finder's alignment.

    Will the 1.44W output of the Dew-Not DN018 be enough on a very humid night?

    Yes. The 1.44W output is specifically calculated for the surface area of the Telrad's window. The goal is not to make the window hot, but to keep it just a few degrees above the ambient dew point. This low-power approach is highly effective and prevents the formation of dew even in damp conditions while observing targets like the Orion Nebula (M42).

    How much power will the DN018 heater draw from my field battery?

    The heater is very efficient, drawing only 0.12 A of current. This is a minimal load for most portable 12V DC astronomy power supplies, allowing you to run it all night with little impact on your battery's total runtime.

    Can I use the Dew-Not Telrad heater on a different type of finder?

    This heater, model DN018, is specifically designed for the Telrad finder. Its shape and attachment method are custom-made for that model. Using it on other finders is not recommended as it will likely not fit correctly or provide even heating.

    I use my Telrad on an 8" SCT for finding Jupiter. Will installing the DN018 heater affect its alignment?

    No, the heater is lightweight and designed to slide on securely without shifting the position of the Telrad. Once your finder is aligned, you can install or remove the heated shield without needing to realign it.

  • MPN DN018
    Compatibility Telrad Finders
    Voltage 12V DC
    Power 1.44 W
    Current Draw 0.12 A
  • Dew-Not Warranty