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Dew Heaters For Telescopes

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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Heater strap for 11" scopes

$60.00

This 1.75" x 40" dew heater strip fits 11" telescopes having an outer barrel diameter of 11.8" to 13.4" (300mm to 340mm) . . .
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Heater strap for 10" scopes

$59.50

This 1.75" x 38" dew heater strip fits 10" telescopes having an outer barrel diameter of 11.3" to 12.7" (290mm to 320mm) . . .
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Heater strap for 9.25" scopes

$57.00

This 1.75" x 33" dew heater strip fits 9¼" telescopes and other scopes having an outer barrel diameter of 9.6" to 11.3" (240mm to 290mm) . . .
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Digital Dew Heater Strip for 5" telescopes

$49.00

This 1" x 20" dew heater strip fits 5" refractors and catadioptric telescopes. The entire back of the heater strip is Velcro. There is a Velcro tab on an elastic strap on one end of the heater strip. When the Velcro tab on its strap is pressed onto the Velcro back of the heater, the elasticity of the strap holds the heater in place on the scope objective . . .
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Digital Dew Heater Strip for 7" to 8" telescopes

$55.00

This 1" x 30" dew heater strip fits 7" to 8" catadioptric telescopes. The entire back of the heater strip is Velcro. There is a Velcro tab on an elastic strap on one end of the heater strip. When the Velcro tab on its strap is pressed onto the Velcro back of the heater, the elasticity of the strap holds the heater in place on the scope objective . . .
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Digital Dew Heater Strip for 1.25" eyepieces and small finderscopes

$39.00

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 is a Velcro tab on an elastic strap on one end of the heater strip. When the Velcro tab on its strap is pressed onto the Velcro back of the heater, the elasticity of the strap holds the heater in place on eyepiece or finder . . .
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Digital Dew Heater Strip for 2" eyepieces and large finderscopes

$39.00

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 Velcro tab on an elastic strap on one end of the heater strip. When the Velcro tab on its strap is pressed onto the Velcro back of the heater, the elasticity of the strap holds the heater in place on eyepiece or finder . . .
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Binoviewer heater straps, pair

$71.00

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 . . .
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Heater strap for 0.965" eyepieces and finderscope eyepieces

$38.00

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This 1.25" x 4.5" dew heater strip fits 0.965" eyepieces and finderscope eyepieces . . .
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Heater strap for 1.25" eyepieces and 50mm finders

$39.00

This 1.25" x 6.5" dew heater strip fits 1.25" eyepieces and 50mm finderscope objectives . . .