Astrozap Dew Shield Heater Strap for 3" Scopes
Manufacturer Part # AZ-703
AstroZap Dew Heater Strap for 3" Telescopes
Even the smallest scopes can fall victim to dew—often faster than their larger counterparts. The AstroZap Dew Heater Strap for 3" telescopes is purpose-built to protect compact OTAs like C90s, ETX-90s, and 80–90mm refractors from the moisture that can cloud your night’s views.
Despite its compact size, this strap packs the same high-quality construction as its larger siblings. A nichrome heating element is embedded within a fabric-backed, flexible band that wraps around your OTA and fastens securely with a Velcro closure. The result is gentle, even warmth that keeps your corrector plate, objective lens, or front element fog-free—no matter how long you’re out under the stars.
It connects via a standard RCA plug to most 12V dew controllers (sold separately), allowing you to regulate power based on ambient conditions. Whether you’re chasing lunar detail or showing Saturn through your favorite grab-and-go rig, this strap keeps your optics clear and your night uninterrupted.
Features:
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Fits most 3" OTAs, including C90, ETX-90, and 80–90mm refractors
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Nichrome heating element delivers low, consistent warmth
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RCA connector compatible with standard 12V dew controllers
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Velcro closure for easy, tool-free attachment
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Flexible, fabric-backed construction made for field durability
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Protects corrector plates, lenses, or secondary mirrors from dew buildup
Observing Tip:
Small scopes cool quickly, making them particularly vulnerable to dew. This strap is an ideal companion for grab-and-go telescopes, especially during outreach, quick sessions, or high-humidity nights. It’s also a great solution for guiding scopes, finder scopes, or even binocular objectives.