Skip to content
Trusted advice since 1979 Excellent 4.5 rating on Google Reviews Free Shipping On Orders Over $100

Dew Heaters & Controllers

Moisture condensing on the eye lens of your eyepiece or on the front lens of your telescope (in other words, dew) can cut short an evening's observing or ruin a long exposure deep space photograph if it forms during the exposure. If enough moisture condenses, it also has the potential of getting into the optical tube or eyepiece and causing damage.

Dew heaters are low wattage 12 Volt DC electrical heater strips that wrap around the objective lens of the telescope (as well as the finderscope and eyepieces, if desired). These warm the optics above the dew point to prevent the formation of dew. Unlike dew shields, dew heaters don't merely slow the formation of dew, they prevent its formation entirely.

Filters

$
$
  • Two channel/four output dew heater controller
    $137.00 - $137.00
    $137.00
    $137.00 - $137.00
    $137.00

    Astrozap Two Channel/Four Output Dew Heater Controller

    Astrozap
    More on the way

    AstroZap Two Channel / Four Output Dew Heater Controller Managing dew doesn't have to mean “all or nothing.” With the AstroZap Two Channel / Four O...

    View full details
    $137.00 - $137.00
    $137.00
    $137.00 - $137.00
    $137.00
  • Heater strap for 2" eyepieces and small scopes
    $45.00 - $45.00
    $45.00
    $45.00 - $45.00
    $45.00

    Astrozap Heater Strap for 2" Eyepieces and Small Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 2" Eyepieces & Small Telescopes Dew doesn’t just strike your optics—it sneaks up on your eyepieces and small find...

    View full details
    $45.00 - $45.00
    $45.00
    $45.00 - $45.00
    $45.00
  • Heater strap for 1.25" eyepieces and 50mm finders
    $43.00 - $43.00
    $43.00
    $43.00 - $43.00
    $43.00

    Astrozap Heater Strap for 1.25" Eyepieces and 50mm Finders

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 1.25" Eyepieces & 50mm Finders Sometimes it’s the smallest lenses that make or break your night. Whether you’re s...

    View full details
    $43.00 - $43.00
    $43.00
    $43.00 - $43.00
    $43.00
  • Heater strap for 3" scopes
    $47.00 - $47.00
    $47.00
    $47.00 - $47.00
    $47.00

    Astrozap Dew Shield Heater Strap for 3" Scopes

    Astrozap
    More on the way

    AstroZap Dew Heater Strap for 3" Telescopes Even the smallest scopes can fall victim to dew—often faster than their larger counterparts. The AstroZ...

    View full details
    $47.00 - $47.00
    $47.00
    $47.00 - $47.00
    $47.00
  • Heater strap for 4" scopes
    $50.00 - $50.00
    $50.00
    $50.00 - $50.00
    $50.00

    Astrozap Heater Strap for 4" Scopes

    Astrozap
    More on the way

    AstroZap Dew Heater Strap for 4" Telescopes Small scopes still suffer from big dew problems. Whether you’re observing with a 4" refractor, Maksutov...

    View full details
    $50.00 - $50.00
    $50.00
    $50.00 - $50.00
    $50.00
  • Heater strap for 5" scopes
    $51.00 - $51.00
    $51.00
    $51.00 - $51.00
    $51.00

    Astrozap Heater Strap for 5" Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 5" Telescopes Compact scopes like the 5" Maksutov-Cassegrain, Schmidt-Cassegrain, or refractor punch above their weig...

    View full details
    $51.00 - $51.00
    $51.00
    $51.00 - $51.00
    $51.00
  • Heater strap for 6" scopes
    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00

    Astrozap Heater Strap for 6" Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 6" Telescopes Your 6" telescope may be compact and portable, but when it comes to dew, size doesn’t matter—moisture c...

    View full details
    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00
  • Flexi-Heat Dew shield for Celestron 11" CGE and HD SCTs with one notch
    $153.00 - $153.00
    $153.00
    $153.00 - $153.00
    $153.00

    Astrozap Flexi-Heat Dew Shield For Celestron 11" CGE And HD SCTs With One Notch

    Astrozap
    In Stock

    AstroZap Flexi-Heat® Heated Dew Shield – For Celestron 11" CGE & EdgeHD SCTs (with Single Notch) Active Dew Control for Celestron 11" Optical T...

    View full details
    $153.00 - $153.00
    $153.00
    $153.00 - $153.00
    $153.00
  • Flexi-Heat Dew shield for Celestron 11" CGE and HD SCTs with two notches
    $155.00 - $155.00
    $155.00
    $155.00 - $155.00
    $155.00

    Astrozap Flexi-Heat Dew Shield For Celestron 11" CGE And HD SCTs With Two Notches

    Astrozap
    More on the way

    AstroZap Flexi-Heat® Heated Dew Shield – For Celestron 11" CGE & EdgeHD SCTs (with Dual Notches) Integrated Dew Control for Fully Rigged 11" Op...

    View full details
    $155.00 - $155.00
    $155.00
    $155.00 - $155.00
    $155.00
  • Heater strap for 8" scopes
    Sold out
    $54.00 - $54.00
    $54.00
    $54.00 - $54.00
    $54.00

    Dew heater strap for 9.25" telescopes. RCA-compatible, fabric-backed design with Velcro closure and built-in low-wattage heating element. Protects corrector plates and optics.

    Astrozap
    Sold Out

    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. AstroZap Dew Heater Strap for 9.25"...

    View full details
    $54.00 - $54.00
    $54.00
    $54.00 - $54.00
    $54.00
    Sold out
  • Flexi-Heat Dew shield for Celestron 8" AVX, CGEM, and Edge HD SCTs
    $102.00 - $102.00
    $102.00
    $102.00 - $102.00
    $102.00

    Astrozap Flexi-Heat Dew Shield With One Notch For Celestron 8" AVX, CGEM, And Edge HD SCTs

    Astrozap
    In Stock

    AstroZap Flexi-Heat® Heated Dew Shield – With One Notch for Celestron 8" AVX, CGEM, and EdgeHD SCTs Targeted Dew Protection for Your Mount-and-Dove...

    View full details
    $102.00 - $102.00
    $102.00
    $102.00 - $102.00
    $102.00
  • Flexi-Heat Dew shield for Celestron 9¼" German equatorial mount SCTs
    $125.00 - $125.00
    $125.00
    $125.00 - $125.00
    $125.00

    Astrozap Flexi-Heat Dew Shield For Celestron 9.25" German Equatorial Mount SCTs

    Astrozap
    More on the way

    AstroZap Flexi-Heat® Heated Dew Shield – For Celestron 9.25" SCTs on German Equatorial Mounts Dew Prevention Meets Mount-Friendly Fit The AstroZap ...

    View full details
    $125.00 - $125.00
    $125.00
    $125.00 - $125.00
    $125.00
  • Heater strap for 10" scopes
    Sold out
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    Astrozap Heater Strap for 9" & 10" Scopes

    Astrozap
    Sold Out

    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. AstroZap Dew Heater Strap for 9" &a...

    View full details
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00
    Sold out
  • Heater for Telrad finders
    $46.00 - $46.00
    $46.00
    $46.00 - $46.00
    $46.00

    Astrozap Heater for Telrad Finders

    Astrozap
    More on the way

    AstroZap Dew Heater for Telrad Finders Your Telrad is one of the most intuitive and widely used finderscopes in amateur astronomy—but it's also one...

    View full details
    $46.00 - $46.00
    $46.00
    $46.00 - $46.00
    $46.00
  • Heater strap for 11" scopes
    $67.00 - $67.00
    $67.00
    $67.00 - $67.00
    $67.00

    Astrozap Heater Strap for 11" Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 11" Telescopes The 11" telescope is a favorite among serious observers and astrophotographers for its ideal balance o...

    View full details
    $67.00 - $67.00
    $67.00
    $67.00 - $67.00
    $67.00
  • Heater strap for 14" scopes
    $78.00 - $78.00
    $78.00
    $78.00 - $78.00
    $78.00

    Astrozap Heater Strap for 14" and 16" Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 14" and 16" Telescopes Big scopes mean big views—and big surfaces for dew to settle on. The AstroZap Heater Strap for...

    View full details
    $78.00 - $78.00
    $78.00
    $78.00 - $78.00
    $78.00
  • Flexi-Heat Dew shield for Meade 12" SCTs
    $159.50 - $159.50
    $159.50
    $159.50 - $159.50
    $159.50

    Astrozap Flexi-Heat Dew Shield for Meade 12" SCTs

    Astrozap
    In Stock

    AstroZap Flexi-Heat Dew Shield for Meade 12" SCTs Big scopes gather big light—and unfortunately, they also gather big dew. The AstroZap Flexi-Heat ...

    View full details
    $159.50 - $159.50
    $159.50
    $159.50 - $159.50
    $159.50
  • Heater strap for 9.25" scopes
    $65.78 - $65.78
    $65.78
    $65.78 - $65.78
    $65.78

    Astrozap Heater Strap for 9.25" and 10" Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 9.25" and 10" Telescopes The 9.25" and 10" Schmidt-Cassegrains are two of the most beloved telescopes in amateur astr...

    View full details
    $65.78 - $65.78
    $65.78
    $65.78 - $65.78
    $65.78
  • Flexi-Heat Dew shield for Celestron and Meade 8" SCTs
    $92.00 - $92.00
    $92.00
    $92.00 - $92.00
    $92.00

    Astrozap Flexi-Heat Dew Shield for Celestron and Meade 8" SCTs

    Astrozap
    In Stock

    AstroZap Flexi-Heat Dew Shield for Celestron & Meade 8" SCTs Whether you're running a Celestron or Meade 8" Schmidt-Cassegrain, you’re in comma...

    View full details
    $92.00 - $92.00
    $92.00
    $92.00 - $92.00
    $92.00
  • Flexi-Heat Dew shield for Meade 10" catadioptrics
    $126.00 - $126.00
    $126.00
    $126.00 - $126.00
    $126.00

    Astrozap Flexi-Heat Dew Shield for Meade 10" Catadioptrics

    Astrozap
    In Stock

    AstroZap Flexi-Heat Dew Shield for Meade 10" Catadioptrics When you're operating a Meade 10" Schmidt-Cassegrain or Schmidt-Newtonian, you're comman...

    View full details
    $126.00 - $126.00
    $126.00
    $126.00 - $126.00
    $126.00
  • Heater strap for 12" scopes
    $69.00 - $69.00
    $69.00
    $69.00 - $69.00
    $69.00

    Astrozap Heater Strap for 12" Scopes

    Astrozap
    In Stock

    AstroZap Dew Heater Strap for 12" Telescopes With a 12" optical tube, you're collecting serious starlight—but also putting a large surface area at ...

    View full details
    $69.00 - $69.00
    $69.00
    $69.00 - $69.00
    $69.00
  • Heater strap for 7" scopes
    $59.00 - $59.00
    $59.00
    $59.00 - $59.00
    $59.00

    Astrozap Heater Strap for 7" and 8" Scopes

    Astrozap
    More on the way

    AstroZap Dew Heater Strap for 7" and 8" Telescopes Telescopes in the 7" to 8" range are some of the most popular choices among backyard astronomers...

    View full details
    $59.00 - $59.00
    $59.00
    $59.00 - $59.00
    $59.00
  • Flexi-Heat Dew shield for 5" Celestron SCTs (except NexStar 5SE) & Meade ETX-125
    $62.00 - $62.00
    $62.00
    $62.00 - $62.00
    $62.00

    Astrozap Flexi-Heat Dew Shield for 5" Celestron SCTs (Except NexStar 5SE) & Meade ETX-125

    Astrozap
    More on the way

    AstroZap Flexi-Heat Dew Shield for 5" Celestron SCTs (Excluding NexStar 5SE) & Meade ETX-125 Even mid-sized scopes need major protection from t...

    View full details
    $62.00 - $62.00
    $62.00
    $62.00 - $62.00
    $62.00
  • Flexi-Heat Dew shield for Celestron fork mount 9¼" SCTs (except GPS)
    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00

    Astrozap Flexi-Heat Dew Shield for Celestron Fork Mount 9.25" SCTs (Except GPS)

    Astrozap
    In Stock

    AstroZap Flexi-Heat Dew Shield for Celestron Fork Mount 9.25" SCTs (Excluding GPS Models) The Celestron 9.25" SCT is prized for its planetary sharp...

    View full details
    $122.00 - $122.00
    $122.00
    $122.00 - $122.00
    $122.00

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare