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
    In Stock

    The Astrozap dual channel dew heater controller is simple, easy to use, compact, and lightweight (only 7 ounces). Its heavy duty plastic case measu...

    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

    This 1.75" x 9" AstroStrap dew heater strip fits 2" eyepieces and small telescope/photoguide/finderscope objectives with a maximum outside diameter...

    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

    This 1.25" x 6.5" AstroStrap dew heater strip fits 1.25" eyepieces and binocular objectives with a maximum outer diameter of 62mm. One side of the ...

    View full details
    $43.00 - $43.00
    $43.00
    $43.00 - $43.00
    $43.00
  • Heater strap for 4" scopes
    $50.00 - $50.00
    $50.00
    $50.00 - $50.00
    $50.00

    Astrozap Heater Strap for 4" Scopes

    Astrozap
    In Stock

    This 1.75" x 15.5" AstroStrap dew heater strip fits refractors and catadioptric telescopes having an outer barrel diameter of 4" to 5.5" (100mm to ...

    View full details
    $50.00 - $50.00
    $50.00
    $50.00 - $50.00
    $50.00
  • 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

    This 1.75" x 13" AstroStrap dew heater strip fits refractors and catadioptric telescopes having an outer barrel diameter of 3.5" to 5" (90mm to 130...

    View full details
    $47.00 - $47.00
    $47.00
    $47.00 - $47.00
    $47.00
  • Digital Dew Heater Four channel/four output control unit
    $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
    In Stock

    The lightweight Digital Dew Heater control unit measures 5" x 2.5" x 1". It comes with a permanently attached 12' (3.65m) power cord. The control u...

    View full details
    $109.00 - $109.00
    $109.00
    $109.00 - $109.00
    $109.00
  • Heater strap for 5" scopes
    $51.00 - $51.00
    $51.00
    $51.00 - $51.00
    $51.00

    Astrozap Heater Strap for 5" Scopes

    Astrozap
    More on the way

    This 1.75" x 16.75" AstroStrap dew heater strip fits refractors and catadioptric telescopes having an outer barrel diameter of 4.7" to 5.9" (120mm ...

    View full details
    $51.00 - $51.00
    $51.00
    $51.00 - $51.00
    $51.00
  • 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

    This 1" x 15" dew heater strip fits 3.1" to 4" refractors and catadioptric telescopes. The entire back of the heater strip is Velcro. There is a Ve...

    View full details
    $49.00 - $49.00
    $49.00
    $49.00 - $49.00
    $49.00
  • Heater strap for 6" scopes
    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00

    Astrozap Heater Strap for 6" Scopes

    Astrozap
    More on the way

    This 1.75" x 20.5" AstroStrap dew heater strip fits refractors and catadioptric telescopes having an outer barrel diameter of 5.9" to 6.9" (150mm t...

    View full details
    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00
  • 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
    In Stock

    This 1" x 4" dew heater strip fits 1.25" eyepieces and most finderscopes up to 50mm aperture. The entire back of the heater strip is Velcro. There ...

    View full details
    $39.00 - $39.00
    $39.00
    $39.00 - $39.00
    $39.00
  • 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
    More on the way

    This Flexi-Heat heated dew shield fits Celestron 11" CGE and HD Schmidt-Cassegrain telescopes. The flexible plastic rollup dew shield is made of bl...

    View full details
    $153.00 - $153.00
    $153.00
    $153.00 - $153.00
    $153.00
  • $259.95 - $259.95
    $259.95
    $259.95 - $259.95
    $259.95

    Celestron Smart Dewheater Controller With Two Outputs 94035

    Celestron
    In Stock

    The Celestron Smart Dewheater Controller has some great attachment options and cool features to help you eliminate any dew issues. Work smarter, no...

    View full details
    $259.95 - $259.95
    $259.95
    $259.95 - $259.95
    $259.95
  • $53.95 - $53.95
    $53.95
    $53.95 - $53.95
    $53.95

    Celestron 8" Dew Heater Ring

    Celestron
    In Stock

    Celestron's innovative dew solution provides heat where you need it most, on the corrector. The Celestron Dew Heater Ring is the ideal dew preventi...

    View full details
    $53.95 - $53.95
    $53.95
    $53.95 - $53.95
    $53.95
  • $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95

    Celestron 11" Dew Heater Ring

    Celestron
    More on the way

    Celestron has come up with a different approach to fight dew formation.  Instead of heating up the tube, they warm the corrector plate where dew fo...

    View full details
    $99.95 - $99.95
    $99.95
    $99.95 - $99.95
    $99.95
  • Digital Dew Heater Strip for 2" eyepieces and large finderscopes
    $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
    More on the way

    This 1" x 6" dew heater strip fits 2" eyepieces and finderscopes over 50mm aperture. The entire back of the heater strip is Velcro. There is a Velc...

    View full details
    $39.00 - $39.00
    $39.00
    $39.00 - $39.00
    $39.00
  • 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

    This Flexi-Heat heated dew shield fits Celestron 11" CGE and HD Schmidt-Cassegrain telescopes. The flexible plastic rollup dew shield is made of bl...

    View full details
    $155.00 - $155.00
    $155.00
    $155.00 - $155.00
    $155.00
  • 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
    More on the way

    This Astrozap Flexi-Heat heated dew shield is designed to fit the Celestron 8" Advanced Series, AVX, and CGEM German equatorial mount Schmidt-Casse...

    View full details
    $102.00 - $102.00
    $102.00
    $102.00 - $102.00
    $102.00
  • Heater strap for 8" scopes
    $54.00 - $54.00
    $54.00
    $54.00 - $54.00
    $54.00

    Astrozap Heater Strap for 8" Scopes

    Astrozap
    In Stock

    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This 1.75" x 30" AstroStrap dew hea...

    View full details
    $54.00 - $54.00
    $54.00
    $54.00 - $54.00
    $54.00
  • 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

    This Astrozap Flexi-Heat heated dew shield is notched to fit the mounting dovetail on the optical tube of all Celestron 9.25" German-mount Schmidt-...

    View full details
    $125.00 - $125.00
    $125.00
    $125.00 - $125.00
    $125.00
  • 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

    This Astrozap dew heater fits the Telrad non-magnifying reflex finder. The U-shaped plastic heater has two legs that slide down into the Telrad, un...

    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

    This 1.75" x 40" AstroStrap dew heater strip fits 11" catadioptric telescopes having an outer barrel diameter of 11.8" to 13.4" (300mm to 340mm). O...

    View full details
    $67.00 - $67.00
    $67.00
    $67.00 - $67.00
    $67.00
  • Heater strap for 10" scopes
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    Astrozap Heater Strap for 9" & 10" Scopes

    Astrozap
    In Stock

    This Product Has Been Discontinued And This Is Here for Informational Purposes Only. It Is No Longer For  Sale. This 1.75" x 38" AstroStrap dew hea...

    View full details
    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00
  • $79.95 - $79.95
    $79.95
    $79.95 - $79.95
    $79.95

    Celestron 9.25" Dew Heater Ring

    Celestron
    In Stock

    Celestron's innovative dew solution provides heat where you need it most, on the corrector. The Celestron Dew Heater Ring is the ideal dew preventi...

    View full details
    $79.95 - $79.95
    $79.95
    $79.95 - $79.95
    $79.95
  • 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

    This 1.75" x 52" AstroStrap dew heater strip fits 14" and 16" catadioptric telescopes with an outer barrel diameter of 14.6" to 16.2" (370mm to 410...

    View full details
    $78.00 - $78.00
    $78.00
    $78.00 - $78.00
    $78.00

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