Dew Heaters

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Accessories / Visual and Everything Else / Dew Heaters
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Dew Heaters
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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dual channel dew heater controller
 
Astrozap - dual channel dew heater controller 
Our Product #:  AZDHCB
Astrozap #: AZ-720

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This Astrzap dual channel controller will independently control the power going to two dew heater strips per channel, for a total of four dew heaters . . .

[ More details . . . ] 
$105.00



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heater for Telrad finders
 
Astrozap - heater for Telrad finders 
Our Product #:  DHTAZ
Astrozap #: AZ 721

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This Astrozap dew heater pad fits the Telrad non-magnifying reflex finder . . .

[ More details . . . ] 
$28.00



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binoviewer heater straps, pair
 
Astrozap - binoviewer heater straps, pair 
Our Product #:  DHBVAZ
Astrozap #: AZ 718

Back-Ordered: Temporarily out of stock; will charge and ship when available.
These dual 1.25” x 6” dew heater strips fit the two eyepieces of a binoviewer or the two objectives of binoculars with a maximum outer barrel diameter of 60mm . . .

[ More details . . . ] 
$65.00



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heater strap for 0.965' eyepieces and finderscope eyepieces
 
Astrozap - heater strap for 0.965" eyepieces and finderscope eyepieces 
Our Product #:  DHEP9AZ
Astrozap #: AZ 700

Low Inventory: Call or e-mail to confirm availability.
This 1.25” x 4.5” dew heater strip fits 0.965” eyepieces and finderscope eyepieces . . .

[ More details . . . ] 
$25.00



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heater strap for 1.25' eyepieces and 50mm finders
 
Astrozap - heater strap for 1.25" eyepieces and 50mm finders 
Our Product #:  DHEP1AZ
Astrozap #: AZ 701

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This 1.25” x 6.5” dew heater strip fits 1.25” eyepieces and 50mm finderscope objectives . . .

[ More details . . . ] 
$30.00



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heater strap for 2' eyepieces and small scopes
 
Astrozap - heater strap for 2" eyepieces and small scopes 
Our Product #:  DHEP2AZ
Astrozap #: AZ 702

Low Inventory: Call or e-mail to confirm availability.
This 1.75” x 9” dew heater strip fits 2” eyepieces, 80mm finders, and small refractors and photoguide scopes . . .

[ More details . . . ] 
$35.00



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heater strap for 3' scopes
 
Astrozap - heater strap for 3" scopes 
Our Product #:  DH3AZ
Astrozap #: AZ 703

Low Inventory: Call or e-mail to confirm availability.
This 1.75” x 13” dew heater strip fits telescopes having an outer barrel diameter of 3.5” to 5” (90mm to 130mm) . . .

[ More details . . . ] 
$40.00



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heater strap for 4' scopes
 
Astrozap - heater strap for 4" scopes 
Our Product #:  DH4AZ
Astrozap #: AZ 704

Low Inventory: Call or e-mail to confirm availability.
This 1.75” x 15.5” dew heater strip fits telescopes having an outer barrel diameter of 4” to 5.5” (100mm to 140mm) . . .

[ More details . . . ] 
$42.00



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heater strap for 5' scopes
 
Astrozap - heater strap for 5" scopes 
Our Product #:  DH5AZ
Astrozap #: AZ 705

Low Inventory: Call or e-mail to confirm availability.
This 1.75” x 16.75” dew heater strip fits telescopes having an outer barrel diameter of 4.7” to 5.9” (120mm to 150mm) . . .

[ More details . . . ] 
$45.00



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heater strap for 6' scopes
 
Astrozap - heater strap for 6" scopes 
Our Product #:  DH6AZ
Astrozap #: AZ 706

Low Inventory: Call or e-mail to confirm availability.
This 1.75” x 20.5” dew heater strip fits telescopes having an outer barrel diameter of 5.9” to 6.9” (150mm to 175mm) . . .

[ More details . . . ] 
$45.00



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