{"title":"Accessoires anti-rosée SVBONY","description":"\u003cp\u003eLes accessoires anti-rosée SVBONY sont des bandes chauffantes qui s'enroulent autour d'un tube, d'une lunette guide ou d'un objectif et maintiennent l'optique légèrement au-dessus de la température de l'air pour empêcher la rosée de se former. Les bandes SV172 existent de 240mm à 430mm, dont une version avec réglage de puissance PWM intégré, et les bandes SV192 12V de 480mm et 560mm conviennent aux tubes plus gros.\u003c\/p\u003e\u003cp\u003eChoisissez la longueur selon la circonférence du tube ou de l'objectif à protéger.\u003c\/p\u003e","products":[{"product_id":"svbony-sv172-dew-heater-strip-240mm","title":"SVBONY SV172 Dew Heater Strip 240mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e240mm Length for Telescopes, Finders \u0026amp; Cameras\u003c\/li\u003e\n\u003cli\u003eFlexible Wrap-Around Design\u003c\/li\u003e\n\u003cli\u003eWaterproof and Durable Construction\u003c\/li\u003e\n\u003cli\u003eLow-Power, Continuous Heating\u003c\/li\u003e\n\u003cli\u003eSimple Installation for Field Use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV172 Dew Heater Strip 240mm\u003c\/h2\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 240mm Solution for Dew-Free Optics\u003c\/h3\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAll-Weather, Flexible Installation\u003c\/h3\u003e\n\u003cp\u003eBuilt 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow well will the SVBONY SV172 240mm Dew Heater fit on a 50mm guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePerfectly. 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI use a DSLR with a 70-200mm f\/2.8 lens for astrophotography. Is the SVBONY SV172 strip the right size?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of power source does the SVBONY SV172 Dew Heater require?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV172 heater strip waterproof?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I leave the SVBONY SV172 on all night?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the flexible design of the SVBONY SV172 help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861264003357,"sku":"SV-W9132A","price":23.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV172-Dew-Heater-Strip-240mm-for-Astronomy-Telescopes-Cameras-1_122cddeb-0db6-4279-aaf1-fe8a73645087.jpg?v=1788660731"},{"product_id":"svbony-sv172-dew-heater-strip-320mm","title":"SVBONY SV172 Dew Heater Strip 320mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e320mm length for larger telescopes, objectives, and camera lenses\u003c\/li\u003e\n\u003cli\u003eActively prevents dew formation for clear, uninterrupted views\u003c\/li\u003e\n\u003cli\u003eFlexible design wraps securely around optical tubes\u003c\/li\u003e\n\u003cli\u003eWeather-resistant materials for reliable outdoor use\u003c\/li\u003e\n\u003cli\u003eEngineered for efficient, low power consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV172 Dew Heater Strip 320mm for Telescopes Cameras Lens\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV172 Dew Heater Strip delivers consistent, gentle warmth across its 320mm length, actively preventing dew from condensing on larger telescope objectives, camera lenses, and corrector plates to ensure your imaging or observing session is never cut short by moisture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 320mm Solution for Dew-Free Nights\u003c\/h3\u003e\n\u003cp\u003eAs ambient temperatures drop, moisture in the air condenses on the coolest available surface—often your primary optics. The SV172 Dew Heater Strip's 320mm length provides complete coverage for the optics on mid-to-large instruments, such as the corrector plates of 8\" Schmidt-Cassegrains or the objective lenses of large refractors and telephoto lenses. By maintaining the glass temperature just slightly above the dew point, it guarantees a clear, fog-free optical path from dusk until dawn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEfficient Power and All-Weather Design\u003c\/h3\u003e\n\u003cp\u003eBuilt from durable, weather-resistant materials, the SV172 is designed to withstand damp, all-night observing sessions. Its construction ensures longevity and reliable heating in harsh conditions. The strip is engineered for thermal efficiency, drawing minimal power to preserve your field battery while providing the consistent heat needed to keep your optics clear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY SV172 320mm dew heater help when imaging with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn 8\" SCT has a large corrector plate that is highly susceptible to dewing over. The \u003cstrong\u003eSVBONY SV172's 320mm length\u003c\/strong\u003e is ideal for wrapping around the optical tube just behind the corrector cell, providing even heat distribution that keeps the entire glass surface clear all night, preventing loss of contrast and detail in your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV172 320mm strip long enough for a large camera lens like a 70-200mm f\/2.8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 320mm length is more than sufficient for large-barrel telephoto lenses. It allows you to wrap the heater around the main objective element or further down the lens barrel, effectively stopping both internal and external fogging during long-exposure astrophotography in humid conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the SVBONY SV172 include a power source or controller?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the SV172 is the heater strip only. You will need to connect it to a dedicated dew controller and a power source (typically a 12V field battery or power tank). This modular approach allows you to integrate it into your existing dew prevention system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the SVBONY SV172 320mm dew heater?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is simple. Just wrap the flexible strip snugly around the part of your telescope or lens you want to keep warm, typically the main housing for the objective lens or corrector plate. Secure it with the integrated fastener, then plug the cable into your dew controller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV172 drain my field battery quickly?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV172 is designed for high efficiency and low power draw. When used with a dew controller that pulses power, it consumes very little energy, making it an excellent choice for use with portable, limited-capacity power tanks during long nights in the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV172 on smaller equipment like finderscopes or eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the 320mm length is optimized for larger optics, you can wrap it multiple times around smaller components. However, for finderscopes and eyepieces, a shorter dew heater strip is often a more convenient and energy-efficient solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e320mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861264036125,"sku":"SV-W9132B","price":24.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV172-Dew-Heater-Strip-320mm-for-Telescopes-Cameras-Lens-1_8047f7c6-fca8-48d6-906d-a7f61132f303.jpg?v=1788660740"},{"product_id":"svbony-sv172-dew-heater-strip-400mm","title":"SVBONY SV172 Dew Heater Strip 400mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm Length\u003c\/li\u003e\n\u003cli\u003ePrevents Dew and Fog Formation\u003c\/li\u003e\n\u003cli\u003eAll-Weather Waterproof Construction\u003c\/li\u003e\n\u003cli\u003eLow-Power, Consistent Heating\u003c\/li\u003e\n\u003cli\u003eSimple Wrap-Around Installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV172 Dew Heater Strip 400mm for Telescopes and Cameras\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV172 Dew Heater Strip provides 400mm of consistent, low-power heating to keep telescope objectives, corrector plates, and camera lenses free from vision-impairing dew. By gently warming the glass above the dew point, it ensures your optics remain clear and fog-free throughout long nights of observation or imaging, even in damp conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAll-Weather Dew Prevention for 400mm Circumference Optics\u003c\/h3\u003e\n\u003cp\u003eDesigned for reliable operation in the field, the SV172 dew heater is built with high-quality, waterproof materials that withstand harsh outdoor conditions. Its 400mm length is ideal for optical tubes with a circumference up to 400mm, which corresponds to telescopes with an aperture of approximately 127mm (5 inches) or smaller, as well as large telephoto camera lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eLow-Power Heating for Consistent, Clear Views\u003c\/h3\u003e\n\u003cp\u003eThe SV172 is engineered to apply gentle, continuous heat, which is critical for maintaining optical quality. This low-power approach prevents the formation of tube currents or heat plumes that can distort high-magnification views of planets and double stars. It also ensures efficient energy use, helping to conserve your field battery during extended sessions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable Optics:\u003c\/strong\u003e By warming the lens just enough to stay above the dew point, the strip avoids introducing thermal instability that can soften sharp focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source (Not Included):\u003c\/strong\u003e This dew heater strip requires a separate dew controller and a 12V DC power source to function, allowing you to regulate the heat output based on ambient temperature and humidity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing the Right Size: Why 400mm Matters\u003c\/h3\u003e\n\u003cp\u003eSelecting the correct dew heater length is crucial for effective dew prevention. The 400mm SV172 is a versatile size that fits a wide range of popular instruments. To confirm fit, simply wrap a flexible measuring tape around your optical tube or lens barrel where you intend to place the heater.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal For:\u003c\/strong\u003e 4\" to 5\" refractors, 5\" Schmidt-Cassegrain or Maksutov-Cassegrain corrector plates, and large telephoto lenses (e.g., 300mm f\/2.8, 400mm f\/4).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot Recommended For:\u003c\/strong\u003e Larger telescopes like 8\" or 10\" SCTs, which require a longer strip to cover their larger circumference. For these, the SV172 can be effectively used on finder scopes or large 2\" eyepieces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if the SVBONY SV172 400mm dew heater is the right size for my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo ensure a proper fit, measure the circumference of your telescope's optical tube or camera lens where the strip will be placed. If the measurement is \u003cstrong\u003e400mm (approximately 15.7 inches) or slightly less\u003c\/strong\u003e, the SV172 is the correct size. It's ideal for instruments around 4-5 inches in diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to use the SVBONY SV172 Dew Heater Strip?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV172 is the heating element only. To operate it, you will need a \u003cstrong\u003edew controller\u003c\/strong\u003e (which allows you to adjust the heat level) and a \u003cstrong\u003e12V DC power source\u003c\/strong\u003e, such as a portable battery pack or AC adapter. These items are not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV172 heater strip damage my optics or lens coatings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The heater is designed for low-power operation that gently warms the lens just a few degrees above the ambient temperature. This is well within the safe operating range for all telescope and camera lens coatings and will not cause any damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV172 on my DSLR camera lens for nightscapes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The 400mm length is perfect for larger professional telephoto or zoom lenses used for astrophotography. It will prevent the front element from fogging up during long exposures, which is a common problem on damp nights.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy 8\" SCT has a circumference over 400mm. Can I still use the SVBONY SV172?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the SV172 is too short for the main optical tube of an 8\" SCT, it is an excellent size for accessories on that scope. You can use it to prevent dew on your \u003cstrong\u003efinder scope, guide scope, or large 2-inch eyepieces\u003c\/strong\u003e, which are also susceptible to dewing up.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the waterproof design of the SVBONY SV172 help during an observing session?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe waterproof construction ensures that heavy dew, frost, or even light rain will not damage the heater strip or cause an electrical short. This provides peace of mind and reliable dew prevention no matter how damp the observing conditions become.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV172\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV172 Dew Heater Strip (400mm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861264593181,"sku":"SV-W9132C","price":23.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV172-Dew-Heater-Strip-400mm-for-Telescopes-and-Cameras-1_71850237-c7be-46f7-bb39-be7dc3ca9ccc.jpg?v=1788660748"},{"product_id":"svbony-sv172-dew-heater-strip-with-pwm-function-430mm","title":"SVBONY SV172 Dew Heater Strip with PWM Function 430mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLength: 430mm\u003c\/li\u003e\n\u003cli\u003eControl: Pulse Width Modulation (PWM)\u003c\/li\u003e\n\u003cli\u003ePower-efficient design\u003c\/li\u003e\n\u003cli\u003eWaterproof construction\u003c\/li\u003e\n\u003cli\u003ePrevents dew and frost on optics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV172 Dew Heater Strip with PWM Function (430mm)\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV172 Dew Heater Strip uses Pulse Width Modulation (PWM) to deliver precise, efficient heating across its full 430mm length. This 430mm strip is designed to protect larger telescope objectives, corrector plates, and camera lenses from dew formation without consuming excess power or creating image-degrading heat currents.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePWM Control: 430mm of Efficient Dew Prevention\u003c\/h3\u003e\n\u003cp\u003eUnlike basic heaters that are either fully on or off, the SV172 utilizes PWM to finely regulate its power output. This allows a compatible controller to deliver just enough energy to keep your optics slightly above the dew point, preventing both condensation and overheating. This method minimizes battery drain during long imaging sessions and avoids introducing tube currents that can soften fine details on planetary targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAll-Weather 430mm Build for Reliable Operation\u003c\/h3\u003e\n\u003cp\u003eConstructed with high-quality, waterproof materials, the SV172 430mm Dew Heater Strip is built to withstand the damp conditions where dew is most problematic. The flexible 430mm strip wraps securely around telescope tubes and larger camera lenses, providing complete and even coverage. Its durable build ensures reliable, fog-free viewing and imaging through changing overnight temperatures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the SVBONY SV172's PWM function?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is \u003cstrong\u003eenergy efficiency and precise temperature control\u003c\/strong\u003e. Instead of running at 100% power, a PWM controller pulses the electricity to the SV172 strip, maintaining a stable temperature just above the dew point. This prevents overheating, reduces battery consumption, and avoids creating heat plumes that can degrade image sharpness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 430mm length of the SV172 strip right for my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 430mm length is ideal for optical tubes with an outer circumference up to 430mm (approximately 135mm or 5.3\" in diameter). This makes it a great fit for many 4\" to 5\" refractors, the corrector plate housing on 6\" Schmidt-Cassegrains, or large telephoto camera lenses. To confirm, measure the circumference of your optical tube or lens where you intend to place the strip.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV172 430mm strip on my Celestron 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the 430mm length is too short for the main optical tube or corrector plate of an 8\" SCT, which typically has a circumference closer to 730mm. While it could be used on a finder scope or large eyepiece attached to the 8\" SCT, you would need a longer dew heater strip for the main objective.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a special controller to use the SV172 Dew Heater Strip?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, to take full advantage of the heater's capabilities, you should connect the SV172 to a \u003cstrong\u003edew controller with PWM outputs\u003c\/strong\u003e. While it may function with a simple on\/off DC power source, you would lose the precise control and power-saving benefits that make PWM technology superior for dew prevention.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV172's waterproof design help during an imaging session?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe waterproof construction ensures the SV172 continues to operate safely and reliably even in very high humidity or if it comes into direct contact with condensation. This protects the internal heating elements from short-circuits, providing peace of mind during all-night automated imaging runs where conditions can change unpredictably.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the SVBONY SV172 also prevent frost?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Frost is simply frozen dew that forms when the surface temperature of your optics drops below freezing. By keeping the glass consistently above the dew point, the SV172 dew heater effectively prevents the formation of both dew and frost, allowing you to observe or image in cold, humid conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861264658717,"sku":"SV-W9132D","price":25.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV172-Dew-Heater-Strip-PWM-Function-430mm-for-Telescopes-and-Cameras-1_25981d2b-1cd1-47ef-8034-16689f619500.jpg?v=1788660760"},{"product_id":"svbony-sv192-12v-dew-heater-strip-480mm","title":"SVBONY SV192 12V Dew Heater Strip 480mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e12V DC Input Voltage\u003c\/li\u003e\n\u003cli\u003e19.2W-21.6W Power Output\u003c\/li\u003e\n\u003cli\u003e1.7A±0.1A Current Draw\u003c\/li\u003e\n\u003cli\u003e1m Power Cord Length\u003c\/li\u003e\n\u003cli\u003e5.5x2.1mm DC Plug\u003c\/li\u003e\n\u003cli\u003eAdjustable Temperature Control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV192 Dew Heater Strip 12V for Telescopes and Lens\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV192 Dew Heater Strip connects via a standard 5.5x2.1mm interface to your 12V power supply, drawing 1.7A to generate 19.2W to 21.6W of consistent, dew-preventing heat. Its integrated 1m power cord is made from flexible TPE Silica, and the multi-layer strip construction ensures efficient thermal transfer to keep your optics clear throughout the night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e12V Power for 19.2W-21.6W of Dew Prevention\u003c\/h3\u003e\n\u003cp\u003eEngineered for field use, the SV192 operates on a standard 12V DC input, making it compatible with virtually all field batteries and astronomy power supplies. It draws a steady 1.7A to produce between 19.2W and 21.6W of thermal power, enough to combat moderate to heavy dew without excessive battery drain. The ability to adjust the temperature allows you to apply just enough heat to stay above the dew point, conserving power for longer imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAll-Weather Construction for Field Reliability\u003c\/h3\u003e\n\u003cp\u003eThe SV192 strip is built from a composite of imitated OK cloth, SBR, Black-T fabric, aluminum film, and cotton. This multi-layer design provides durability against moisture and abrasion while the internal aluminum film ensures heat is directed inward toward your optics, not lost to the night air. The 1m power cord is sheathed in TPE Silica, a material that remains flexible even in cold temperatures, preventing cracks and connection failures during critical moments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of power supply do I need for the SVBONY SV192 Dew Heater Strip?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need a \u003cstrong\u003e12V DC power source\u003c\/strong\u003e with a female \u003cstrong\u003e5.5x2.1mm\u003c\/strong\u003e connector. This is a common standard for portable astronomy power tanks, field batteries, and AC-to-DC adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much power does the SV192 Dew Heater draw from a battery?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV192 draws \u003cstrong\u003e1.7A ±0.1A\u003c\/strong\u003e. For planning purposes, if you have a 17Ah battery, this heater running at full power would theoretically last about 10 hours. Your actual runtime will vary based on battery health and other connected equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the temperature of the SVBONY SV192 adjustable?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SVBONY SV192 features \u003cstrong\u003eadjustable temperature\u003c\/strong\u003e. This requires a separate dew controller (not included) that can regulate the voltage or use pulse-width modulation (PWM) to control the power output, allowing you to fine-tune the heat and conserve battery life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size telescopes will the SVBONY SV192 Dew Heater Strip fit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fit depends on the outer diameter of your telescope tube or dew shield. To ensure a proper fit, you should measure the circumference of the part you intend to heat. This strip is typically suitable for small-to-medium refractors, camera lenses, and finder scopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm using an 8\" SCT for a long night of imaging the Andromeda Galaxy (M31). Will the SV192 keep my corrector plate clear?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the SV192 can provide heat, its suitability for an 8\" SCT corrector plate depends on its physical length. You should measure the circumference of your SCT's front cell. If the strip is long enough to wrap around it, its 19.2W-21.6W output is generally sufficient to prevent dew on a corrector of that size in most conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV192 on my 80mm refractor's dew shield and my guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV192 is well-suited for use on the dew shields of 80mm-class refractors and most standard 50mm or 60mm guide scopes. Its power output is ideal for preventing dew on these smaller optical elements without introducing tube currents.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Type\u003c\/td\u003e\n\u003ctd\u003e5.5x2.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e1.7A ±0.1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e19.2W - 21.6W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustable Temperature\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrip Material\u003c\/td\u003e\n\u003ctd\u003eImitated OK cloth, SBR, Black-T, aluminum film, Cotton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Cord Length\u003c\/td\u003e\n\u003ctd\u003e1m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Cord Material\u003c\/td\u003e\n\u003ctd\u003eTPE Silica\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861264822557,"sku":"SV-W9151A","price":25.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV192-Dew-Heater-Strip-12V-for-Telescopes-and-Lens-1_d8de36ee-4763-45aa-bb4b-d49e8b68b487.jpg?v=1788660770"},{"product_id":"svbony-sv192-12v-dew-heater-strip-560mm","title":"SVBONY SV192 12V Dew Heater Strip 560mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDelivers 19.2W to 21.6W of heating power\u003c\/li\u003e\n\u003cli\u003eStandard 12V DC operation with 5.5x2.1mm plug\u003c\/li\u003e\n\u003cli\u003eDraws a consistent 1.7A (±0.1A) current\u003c\/li\u003e\n\u003cli\u003eFlexible 1m TPE Silica power cord for cold weather\u003c\/li\u003e\n\u003cli\u003eTemperature is adjustable with a compatible controller\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV192 Dew Heater Strip 12V for Telescopes and Lens\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV192 Dew Heater Strip delivers 19.2W to 21.6W of adjustable heat to keep your optics free of condensation throughout the night. It draws a consistent 1.7A (±0.1A) from any standard 12V field power supply using a common 5.5x2.1mm interface. The integrated 1m TPE Silica power cord provides ample reach and remains flexible even in freezing temperatures, ensuring reliable power delivery when you need it most.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e19.2W-21.6W of Consistent Heat to Defeat Dew\u003c\/h3\u003e\n\u003cp\u003eOperating within a 19.2W to 21.6W power range, the SV192 provides enough thermal energy to gently raise your lens or corrector plate temperature just above the dew point without introducing tube currents. Powered by a standard 12V source and drawing 1.7A, it's fully compatible with the power tanks and batteries used in most field astrophotography setups. While the strip's temperature is adjustable, this requires an external dew controller to fine-tune the power output for changing humidity and temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDurable Multi-Layer Construction with 1m Power Cord\u003c\/h3\u003e\n\u003cp\u003eThe SV192 is built from a composite of imitated OK cloth, SBR, Black-T fabric, aluminum film, and cotton, a combination that ensures both durability and efficient, even heat transfer to your optics. The 1m power cord is made from TPE Silica, a material chosen for its ability to resist kinking and cracking in cold weather. It terminates in a standard 5.5x2.1mm DC plug, making it a simple, plug-and-play solution for most astronomy power systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of power supply do I need for the SVBONY SV192 Dew Heater Strip?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need a \u003cstrong\u003e12V DC\u003c\/strong\u003e power source capable of providing at least \u003cstrong\u003e1.7A (±0.1A)\u003c\/strong\u003e of current. The strip connects via a standard \u003cstrong\u003e5.5x2.1mm\u003c\/strong\u003e plug, which is common on most astronomical power tanks and portable batteries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the temperature of the SVBONY SV192 Dew Heater Strip adjustable?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the heating output is adjustable. However, the SVBONY SV192 strip itself does not have a built-in controller. You must connect it to an external dew heater controller, which allows you to vary the voltage and precisely manage the power output based on ambient conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I prevent my 8\" SCT corrector plate from dewing up with the SVBONY SV192?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor an 8\" Schmidt-Cassegrain Telescope, you should wrap the SVBONY SV192 strip around the metal cell of the optical tube, just behind the corrector plate. This positioning gently warms the glass from the edge, preventing dew from forming on the optical surface without degrading the image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV192 work on my camera lens for nightscape photography of the Milky Way?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The SVBONY SV192 is ideal for preventing dew on DSLR or mirrorless camera lenses during long exposures. Simply wrap the strip around the lens barrel, as close to the front element as possible without interfering with the focus or zoom rings, to keep the glass clear all night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the power cord on the SVBONY SV192 designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV192 features a \u003cstrong\u003e1m power cord\u003c\/strong\u003e made of \u003cstrong\u003eTPE Silica\u003c\/strong\u003e. This material is specifically chosen for its excellent flexibility in cold weather, preventing the cord from becoming stiff or brittle during winter observing sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat materials are used in the SVBONY SV192 strip?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe strip is constructed from a multi-layer composite designed for durability and efficient heating. The materials include \u003cstrong\u003eimitated OK cloth, SBR, Black-T fabric, aluminum film, and a cotton\u003c\/strong\u003e layer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Type\u003c\/td\u003e\n\u003ctd\u003e5.5x2.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e1.7A ±0.1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e19.2W - 21.6W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustable Temperature\u003c\/td\u003e\n\u003ctd\u003eYes (with external controller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrip Material\u003c\/td\u003e\n\u003ctd\u003eImitated OK cloth, SBR, Black-T, aluminum film, Cotton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Cord Length\u003c\/td\u003e\n\u003ctd\u003e1m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Cord Material\u003c\/td\u003e\n\u003ctd\u003eTPE Silica\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV192 Dew Heater Strip\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861266034973,"sku":"SV-W9151B","price":26.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV192-Dew-Heater-Strip-12V-for-Telescopes-and-Lens-1-W9151B_04c66453-910d-4a49-a027-d94bbbf7484a.jpg?v=1788660781"}],"url":"https:\/\/davidastro.com\/fr\/collections\/svbony-dew-control.oembed","provider":"David Astro","version":"1.0","type":"link"}