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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.

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  • 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...

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    $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...

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    $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...

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    $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...

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    $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...

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    $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...

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    $51.00 - $51.00
    $51.00
    $51.00 - $51.00
    $51.00
  • Digital Dew Heater Four channel/four output control unit
    Sold out
    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00

    Thousand Oaks Digital Dew Heater Four Channel/Four Output Control Unit

    Thousand Oaks
    Sold Out

    Thousand Oaks Digital Dew Heater Control Unit – Four Channel / Four Output Advanced Dew Prevention with Full Digital Control and Battery-Saving Eff...

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    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00
    Sold out
  • 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...

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    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00
  • Digital Dew Heater Strip for 3.1" to 4" telescopes
    $49.00 - $49.00
    $49.00
    $49.00 - $49.00
    $49.00

    Thousand Oaks Digital Dew Heater Strip for 3.1" to 4" Telescopes

    Thousand Oaks
    More on the way

    Thousand Oaks Dew Heater Strip – For 3.1" to 4" Telescopes Compact Dew Control for Small Refractors and Maksutovs This Thousand Oaks dew heater str...

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    $49.00 - $49.00
    $49.00
    $49.00 - $49.00
    $49.00
  • Celestron Smart DewHeater 2X Controller – front view showing two RCA dew ports
    $269.95 - $269.95
    $269.95
    $269.95 - $269.95
    $269.95

    Celestron Smart Dewheater Controller With Two Outputs 94035

    Celestron
    In Stock

    Celestron Smart DewHeater & Power Controller 2X Intelligent dew protection and power distribution for streamlined telescope setups Dew doesn’t ...

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    $269.95 - $269.95
    $269.95
    $269.95 - $269.95
    $269.95
  • Digital Dew Heater Strip for 1.25" eyepieces and small finderscopes
    $39.00 - $39.00
    $39.00
    $39.00 - $39.00
    $39.00

    Thousand Oaks Digital Dew Heater Strip for 1.25" Eyepieces and Small Finderscopes

    Thousand Oaks
    More on the way

    Thousand Oaks Dew Heater Strip – For 1.25" Eyepieces & Small Finderscopes Keep Your Optics Clear and Dew-Free All Night Long There’s nothing qu...

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    $39.00 - $39.00
    $39.00
    $39.00 - $39.00
    $39.00
  • Celestron 8-inch Dew Heater Ring – front view with aluminum housing and cable clips
    $55.95 - $55.95
    $55.95
    $55.95 - $55.95
    $55.95

    Celestron 8" Dew Heater Ring

    Celestron
    In Stock

    Celestron 8-inch Dew Heater Ring (Part #94051) Direct-heating dew protection for 8" SCT, EdgeHD, and RASA telescopes Your 8" Celestron SCT is the u...

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    $55.95 - $55.95
    $55.95
    $55.95 - $55.95
    $55.95
  • 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...

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    $153.00 - $153.00
    $153.00
    $153.00 - $153.00
    $153.00
  • Celestron 11″ Dew Heater Ring – Direct Heating for SCT, EdgeHD & RASA | Astronomics
    $104.95 - $104.95
    $104.95
    $104.95 - $104.95
    $104.95

    Celestron 11" Dew Heater Ring

    Celestron
    In Stock

    Celestron 11-inch Dew Heater Ring (Part #94053) Direct-glass heating for 11" SCT, EdgeHD, and RASA optical tubes When you own a premium 11" Celestr...

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    $104.95 - $104.95
    $104.95
    $104.95 - $104.95
    $104.95
  • Digital Dew Heater Strip for 2" eyepieces and large finderscopes
    Sold out
    $39.00 - $39.00
    $39.00
    $39.00 - $39.00
    $39.00

    Thousand Oaks Digital Dew Heater Strip for 2" Eyepieces and Large Finderscopes

    Thousand Oaks
    Sold Out

    Thousand Oaks Dew Heater Strip – For 2" Eyepieces & Medium Finderscopes Reliable Dew Prevention for Larger Eyepieces and Accessories Larger opt...

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    $39.00 - $39.00
    $39.00
    $39.00 - $39.00
    $39.00
    Sold out
  • 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...

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    $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"...

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    $54.00 - $54.00
    $54.00
    $54.00 - $54.00
    $54.00
    Sold out
  • Celestron 9.25-inch Dew Heater Ring – front view showing cable clips and aluminum frame
    $81.95 - $81.95
    $81.95
    $81.95 - $81.95
    $81.95

    Celestron 9.25" Dew Heater Ring

    Celestron
    In Stock

    Celestron 9.25-inch Dew Heater Ring (Part #94052) Permanent, efficient dew control—right at the glass—for your 9.25" SCT or EdgeHD The 9.25" Schmid...

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    $81.95 - $81.95
    $81.95
    $81.95 - $81.95
    $81.95
  • 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...

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    $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 ...

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    $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...

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    $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...

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    $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...

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    $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...

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    $78.00 - $78.00
    $78.00
    $78.00 - $78.00
    $78.00

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