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SVBONY SV172 Dew Heater Strip 240mm
The SVBONY SV172 Dew Heater Strip delivers 240mm of active, low-power heating to keep telescope objectives, finder scopes, and camera lenses clear of session-ending dew, ensuring sharp views all night long.
The 240mm Solution for Dew-Free Optics
A 240mm length is ideal for protecting the optics on most finder scopes, guide scopes, and larger camera lenses up to about 76mm in diameter. The SVBONY SV172 applies gentle, continuous heat directly to the lens cell or tube, raising the surface temperature just enough to prevent moisture from condensing. This active prevention is the only reliable way to combat dew, especially during long imaging sessions on humid nights.
All-Weather, Flexible Installation
Built to withstand damp observing conditions, the SV172 heater strip is made from durable, waterproof materials for reliable use night after night. Its flexible construction allows it to conform tightly to the curve of your optical tube or lens barrel for efficient heat transfer. Installation is straightforward, allowing you to quickly secure it and connect to a power source, minimizing setup time.
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How well will the SVBONY SV172 240mm Dew Heater fit on a 50mm guide scope?
Perfectly. The 240mm length is more than enough to wrap around a standard 50mm guide scope or finder scope, providing complete coverage to prevent dew formation on the objective lens.
I use a DSLR with a 70-200mm f/2.8 lens for astrophotography. Is the SVBONY SV172 strip the right size?
Yes, the 240mm length is an excellent fit for most 70-200mm or similar telephoto lenses. It wraps around the lens barrel just behind the front element, gently warming it to keep dew from forming and ruining your exposures.
What kind of power source does the SVBONY SV172 Dew Heater require?
The SVBONY SV172 strip is designed for low-power operation and requires a dew controller or a compatible 12V power source with a variable output to regulate the heat. The heater itself does not have a built-in controller.
Is the SVBONY SV172 heater strip waterproof?
Yes, the SVBONY SV172 is constructed from waterproof materials, making it safe and reliable for use in damp, high-humidity environments where dew is most common.
Can I leave the SVBONY SV172 on all night?
Absolutely. It is designed for continuous, low-power operation throughout a long observing or imaging session. The gentle heating is meant to run for hours to consistently keep your optics clear.
How does the flexible design of the SVBONY SV172 help?
The flexible design ensures the strip makes close contact with your equipment, whether it's a small eyepiece or a curved telescope tube. This snug fit maximizes heat transfer efficiency, so more of the warmth goes into your optics and less is wasted.
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SVBONY 1-Year Warranty
