{"product_id":"ioptron-8453","title":"iOptron Electronic Automatic Focuser - iEAF","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e5 kg Maximum Payload Capacity\u003c\/li\u003e\n\u003cli\u003eHigh-Precision Stepper Motor Drive\u003c\/li\u003e\n\u003cli\u003eBuilt-in Temperature Sensor for Focus Compensation\u003c\/li\u003e\n\u003cli\u003eASCOM Compatible for Automated Imaging\u003c\/li\u003e\n\u003cli\u003eWeighs only 254g\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\u003eiOptron Electronic Automatic Focuser - iEAF\u003c\/h2\u003e\n\u003cp\u003eThe iOptron Electronic Automatic Focuser (iEAF) automates one of the most critical steps in astrophotography, delivering repeatable, sharp focus across entire imaging sessions. Its high-precision stepper motor handles imaging trains up to 5 kg, while the built-in temperature sensor provides the data needed for software to counteract thermal focus shift. The entire system weighs only 254g and connects via a single USB2.0 port for power and data, eliminating the need for external power supplies or hand controllers.\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\u003ePrecision Drive System: A 5 kg Payload Stepper Motor\u003c\/h3\u003e\n\u003cp\u003eAt the core of the iEAF is a robust stepper motor designed for smooth, precise, and repeatable movements. With a payload capacity of 5 kg, it can easily handle heavy imaging setups that include large-sensor cameras, filter wheels, and off-axis guiders without slipping or backlash. This ensures that once your focusing routine is complete, the focus point remains exactly where it needs to be for the duration of your exposure.\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\u003eAutomated Focus Control: Built-in Temperature Sensor \u0026amp; ASCOM Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe iEAF is engineered to eliminate focus drift caused by falling nighttime temperatures. A built-in temperature sensor constantly monitors ambient conditions, feeding this data to your imaging software via its ASCOM driver. Programs like N.I.N.A. or SharpCap can then use this information to trigger auto-focus routines automatically, ensuring your stars remain pinpoints from dusk until dawn without manual intervention.\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\u003eErgonomic Design: A 254g Focuser with Integrated Manual Controls\u003c\/h3\u003e\n\u003cp\u003eMeasuring just 51 x 61 x 41mm and weighing only 254g, the iEAF adds minimal weight and profile to your optical tube, simplifying balancing. For initial setup or manual adjustments in the field, iOptron integrated two direction buttons directly onto the focuser body. This provides immediate, tactile control without needing to connect a separate hand controller or interact with software—a significant convenience for quick adjustments at the telescope.\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\u003eiOptron iEAF vs. ZWO EAF: A Head-to-Head Comparison\u003c\/h3\u003e\n\u003cp\u003eWhile the ZWO EAF is a popular choice, the iOptron iEAF presents several key advantages for the astrophotographer.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Controls:\u003c\/strong\u003e The iEAF's biggest ergonomic advantage is its integrated manual control buttons. The ZWO EAF requires a separate, wired hand controller for manual operation, adding another cable and component to manage in the dark.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e Users report the iEAF's included mounting brackets and hardware feel more robust and provide a more straightforward installation on a wider variety of Crayford and Rack-and-Pinion focusers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Operation:\u003c\/strong\u003e The stepper motor in the iEAF is noted for its particularly smooth and quiet operation, ensuring minimal disturbance to the optical train during focusing.\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 does the iOptron iEAF's temperature sensor improve my astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAs the temperature drops overnight, the metal in your telescope tube contracts, causing the focal point to shift. The iOptron iEAF's \u003cstrong\u003ebuilt-in temperature sensor\u003c\/strong\u003e relays this change to ASCOM-compatible software, which can automatically re-run your autofocus routine. This ensures your images remain critically sharp all night long, preventing hours of data from being ruined by thermal focus drift.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software is compatible with the iOptron iEAF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iOptron iEAF is fully \u003cstrong\u003eASCOM compatible\u003c\/strong\u003e, allowing it to work with most major astrophotography control software. It is known to integrate seamlessly with popular applications such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eN.I.N.A. (Nighttime Imaging 'N' Astronomy)\u003c\/li\u003e\n\u003cli\u003eSharpCap\u003c\/li\u003e\n\u003cli\u003eSequence Generator Pro (SGP)\u003c\/li\u003e\n\u003cli\u003eAnd any other software that supports ASCOM-compliant focusers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the iOptron iEAF work with my 8\" Schmidt-Cassegrain's focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the iOptron iEAF is designed for broad compatibility with most \u003cstrong\u003eCrayford or Rack-and-Pinion\u003c\/strong\u003e style focusers, which are common on Schmidt-Cassegrains, refractors, and Newtonians. The included bracket and shaft coupler kit is versatile, but you should always confirm the physical layout of your specific focuser to ensure a clear mounting path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 5 kg payload capacity of the iEAF mean for my setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e5 kg (11 lbs) maximum payload\u003c\/strong\u003e means the iEAF's motor has enough torque to lift a heavy imaging train without stalling or slipping. This is more than sufficient for typical setups including a large astronomy camera, a multi-filter wheel, and an off-axis guider, ensuring reliable and precise focusing performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the manual control buttons on the iOptron iEAF work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iOptron iEAF features two small buttons directly on the housing for manual control. One button moves the focuser inward, and the other moves it outward. This allows for quick, tactile adjustments at the telescope for initial focusing without needing to be connected to a computer or fumbling with a separate hand controller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging the Andromeda Galaxy (M31) on a cold night; how does the iEAF help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a long imaging session on a target like the Andromeda Galaxy (M31), temperatures can drop significantly, causing your telescope to lose focus. The iEAF's \u003cstrong\u003ebuilt-in temperature sensor\u003c\/strong\u003e and ASCOM integration allow your software to monitor this change and automatically refocus every hour or after a specific temperature drop. This keeps your stars tight and your galactic details sharp across all your subframes without you needing to manually intervene.\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\u003eFocuser Compatibility\u003c\/td\u003e\n\u003ctd\u003eCrayford or Rack-and-Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive System\u003c\/td\u003e\n\u003ctd\u003eStepper motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Payload\u003c\/td\u003e\n\u003ctd\u003e5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Speed\u003c\/td\u003e\n\u003ctd\u003e3 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eASCOM compatible or manual buttons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Sensor\u003c\/td\u003e\n\u003ctd\u003eYes (Built-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower \/ Communication\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e51 x 61 x 41mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e254g (focuser only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe manufacturer has not provided a list of included items for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/ioptron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eiOptron 2-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":52917289976093,"sku":"IOP-8453","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-Electronic-Automatic-Focuser-iEAF-1_3967a399-7aba-4918-8d37-91979d515fb5.jpg?v=1789141998","url":"https:\/\/davidastro.com\/fr-us\/products\/ioptron-8453","provider":"David Astro","version":"1.0","type":"link"}