{"product_id":"orion-optics-uk-secondary-dew-heater-odk24tr-carbon-fibre","title":"Orion Optics UK Dew Heater for Sec. 24″","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCustom-fit for the Orion Optics UK 24\" ODK secondary mirror\u003c\/li\u003e\n\u003cli\u003ePrevents dew formation to maintain image contrast and brightness\u003c\/li\u003e\n\u003cli\u003eConstructed from lightweight and durable carbon fibre\u003c\/li\u003e\n\u003cli\u003eEssential for long-exposure astrophotography sessions\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\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\u003eDew Heater for Sec. 24″\u003c\/h2\u003e\n      \u003cp\u003eThis Orion Optics UK Dew Heater is specifically engineered for the secondary mirror of the 24\" ODK telescope, providing an essential defense against image-degrading moisture. Constructed from rigid carbon fibre, it ensures your telescope's hand-figured optics perform at their peak throughout the night by gently warming the secondary mirror just above the dew point, preserving the high-contrast views required for elite astrophotography.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003ePurpose-Built Dew Prevention for the ODK24 Secondary\u003c\/h3\u003e\n      \u003cp\u003eThe open-tube design of the Orion Optics UK 24\" ODK, while excellent for rapid thermal acclimation, leaves the secondary mirror exposed to the night air. As temperatures drop, this critical optical surface can cool below the dew point, causing micro-droplets of water to form, scattering light and severely reducing image contrast. This heater is designed to stop that process before it starts, applying minimal, controlled warmth directly to the secondary mirror housing to keep it clear all night.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eLightweight Carbon Fibre Construction\u003c\/h3\u003e\n      \u003cp\u003eEngineered from carbon fibre, this secondary dew heater adds negligible weight to the telescope's front assembly. This is critical for maintaining the fine balance of the optical tube and ensures there is no undue stress on the secondary mirror spider vanes. The material's excellent thermal properties also contribute to even heat distribution, preventing hotspots and ensuring uniform protection across the mirror's surface.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a dedicated secondary heater essential for the Orion Optics UK 24\" ODK?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe 24\" ODK's large, exposed secondary mirror is highly susceptible to dew, especially during long imaging sessions on humid nights. Even a thin layer of dew can scatter light from bright stars and erase faint detail in galaxies and nebulae. This heater is a non-negotiable accessory for maintaining the telescope's high-contrast optical capabilities.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the signs my ODK24 secondary mirror is dewing over?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe first signs of secondary mirror dew are a gradual loss of contrast, a \"halo\" or glow appearing around bright stars, and the inability to resolve faint details you could see earlier in the session. In severe cases, the entire field of view will appear washed out and foggy. The Orion Optics UK Dew Heater prevents these issues from ever impacting your observations or images.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the carbon fibre body of this Orion Optics UK heater help?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eCarbon fibre\u003c\/strong\u003e is both extremely lightweight and structurally rigid. This minimizes its impact on the telescope's balance and collimation by adding virtually no extra mass or stress to the secondary spider assembly. It is an ideal material for this critical location in the optical path.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill installing the Dew Heater for Sec. 24\" affect my telescope's collimation?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This heater is designed to integrate with the existing secondary mirror assembly without altering the optical alignment. Its lightweight carbon fibre construction ensures it does not cause any sag or shift in the secondary mirror's position.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the Dew Heater for Sec. 24\" powered and controlled?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis dew heater is designed to be connected to a standard third-party dew controller. A controller allows you to adjust the power level, providing just enough heat to prevent dew without introducing tube currents, which is the recommended practice for optimal image stability.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I leave the Orion Optics UK Dew Heater permanently installed on my ODK24?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, the heater is designed for permanent installation. It becomes an integrated part of your telescope, ready to be powered on whenever you observe, simplifying your setup and teardown process.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942375190813,"sku":"OOUK-SECONDARY-DEW-HEATER-ODK24TR-CARBON","price":1674.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_879c6bfd-2257-484d-8fa4-b08c9ee94aac.jpg?v=1789607131","url":"https:\/\/davidastro.com\/en-us\/products\/orion-optics-uk-secondary-dew-heater-odk24tr-carbon-fibre","provider":"David Astro","version":"1.0","type":"link"}