{"product_id":"ioptron-fa20","title":"iOptron iAFS2 - iOptron 2'' Inline Automatic Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSupports a maximum payload of 5kg without slippage\u003c\/li\u003e\n\u003cli\u003eDelivers 0.6µm focusing resolution for critical imaging\u003c\/li\u003e\n\u003cli\u003eFeatures a 51mm clear aperture for full-frame sensors\u003c\/li\u003e\n\u003cli\u003eProvides 30mm of drawtube travel\u003c\/li\u003e\n\u003cli\u003eConnects via two USB2.0 Type-C ports\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\u003eiAFS2 - iOptron 2'' Inline Automatic Focuser\u003c\/h2\u003e\n\u003cp\u003eThe iOptron iAFS2 is an inline automatic focuser engineered to eliminate image shift, supporting a heavy 5kg payload with its patented iLock™ lead worm drive. It provides 30mm of precise travel with a resolution of 0.6µm, ensuring critical focus across your entire imaging session. With a generous 51mm clear aperture, the 783g focuser avoids vignetting on large sensors, while dual USB2.0 Type-C ports provide robust connectivity for ASCOM and INDI control.\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\u003eiLock™ Lead Worm Drive: The 5kg Zero-Shift System\u003c\/h3\u003e\n\u003cp\u003eAt the core of the iAFS2 is a lead worm movement system that passively locks the drawtube's position the moment the motor stops. This iLock™ technology provides exceptional rigidity, holding up to a 5kg imaging train firm without any backlash or slippage, even when your telescope is pointed at the zenith. This design ensures that your critical focus point is maintained throughout temperature changes and slews across the sky.\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\u003eTriple Control: 0.6µm Precision via ASCOM, Buttons, or Manual Wheel\u003c\/h3\u003e\n\u003cp\u003eThe iAFS2 offers three independent methods for focus control, giving you complete command over its 0.6µm step size. For automated imaging, it connects to your PC via dual USB-C ports and is fully compatible with ASCOM and INDI drivers for seamless integration with software like NINA or SharpCap. For field adjustments, you can use the responsive onboard directional buttons for powered manual control, or use the large manual focusing wheel for unpowered, tactile adjustments.\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\u003e51mm Clear Aperture and Built-in Temperature Sensing\u003c\/h3\u003e\n\u003cp\u003eEngineered for modern astro-imaging, the iAFS2 features a 51mm clear aperture, preventing vignetting on full-frame and other large-format sensors. A built-in temperature sensor provides real-time data to your autofocusing software, enabling automatic focus compensation as ambient temperature drops. The focuser also includes a camera angle adjuster for precise framing of your target, making it a complete solution for a robust imaging train.\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 iLock™ technology in the iOptron iAFS2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eiLock™\u003c\/strong\u003e is iOptron's patented focusing mechanism that uses a \u003cstrong\u003elead worm drive\u003c\/strong\u003e. This system is designed to be self-locking; when the stepper motor is not moving, the drawtube is passively held in place. This prevents any focus shift or slippage caused by gravity, even with a heavy payload up to 5kg.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much weight can the iAFS2 focuser support?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iOptron iAFS2 is rated for a \u003cstrong\u003emaximum payload of 5kg (11 lbs)\u003c\/strong\u003e. This capacity allows it to easily handle a complete imaging train, including a cooled astronomy camera, filter wheel, and off-axis guider, without risk of slipping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the iAFS2 focuser manually if my computer or power fails?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The iAFS2 is designed with a large manual focusing wheel that allows you to make precise adjustments even without power. This provides a reliable backup and is useful for initial setup or visual observation.\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 iAFS2 for autofocusing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iAFS2 is compatible with any software that supports the \u003cstrong\u003eASCOM\u003c\/strong\u003e or \u003cstrong\u003eINDI\u003c\/strong\u003e platforms. This includes popular astrophotography acquisition software such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNINA (N.I.N.A.)\u003c\/li\u003e\n\u003cli\u003eSharpCap\u003c\/li\u003e\n\u003cli\u003eSequence Generator Pro (SGP)\u003c\/li\u003e\n\u003cli\u003eKStars\/Ekos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 51mm clear aperture of the iAFS2 benefit imaging with a full-frame camera on my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e51mm clear aperture\u003c\/strong\u003e is larger than the diagonal of a full-frame sensor (approx. 43mm). When used with a Schmidt-Cassegrain Telescope (SCT) and a compatible reducer, this ensures that the light cone is not clipped by the focuser itself, preventing vignetting (darkened corners) and providing even illumination across the entire sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the iAFS2 consume significant back focus in my imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, as an inline focuser, the iAFS2 will consume a portion of your available back focus. The exact amount depends on the telescope adapter used (sold separately). Before purchasing, you should measure the back focus of your specific telescope and imaging train to ensure you have enough space to accommodate the focuser body and achieve focus.\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 Type\u003c\/td\u003e\n\u003ctd\u003eInline Auto Focuser with iLock™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e51mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrawtube Travel\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocusing Resolution\u003c\/td\u003e\n\u003ctd\u003e0.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Payload\u003c\/td\u003e\n\u003ctd\u003e5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDriving Train\u003c\/td\u003e\n\u003ctd\u003eStepper motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputer Control\u003c\/td\u003e\n\u003ctd\u003eYes (ASCOM and INDI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutomatic Focusing\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotorized Buttons\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Focusing\u003c\/td\u003e\n\u003ctd\u003eYes (with or without power)\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\u003eCamera Angle Adjustment\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\/Communication\u003c\/td\u003e\n\u003ctd\u003eUSB2.0 Type-C port (x2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e90.5 X 106 X 82mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e783g\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\"\u003eiAFS2 Inline Automatic Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Visual Back\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\u003cdiv class=\"DAV-section-center\"\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e A telescope-specific adapter is required for connection and is NOT included.\u003c\/p\u003e\n\u003c\/div\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":52917287944477,"sku":"IOP-FA20","price":459.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-iAFS2-iOptron-2-Inline-Automatic-Focuser-1_a55fa084-f175-4694-80e6-7566730ebc44.jpg?v=1789141964","url":"https:\/\/davidastro.com\/fr-us\/products\/ioptron-fa20","provider":"David Astro","version":"1.0","type":"link"}