{"title":"Porte-oculaires automatiques en ligne iOptron iAFS","description":"\u003cp\u003eLes porte-oculaires automatiques en ligne iOptron iAFS s'insèrent dans le train optique et déplacent la caméra le long de l'axe optique, pour une mise au point motorisée et reproductible sans dépendre du porte-oculaire du télescope. L'iAFS2 est le modèle 2\" et l'iAFS3 le modèle 3\".\u003c\/p\u003e\u003cp\u003eDe nombreux adaptateurs conviennent au Celestron C11, aux RC et Newton GSO, aux lunettes Askar et TeleVue 76\/85 et à la Takahashi TSA-120, avec des adaptateurs visuels 2\" et caméra.\u003c\/p\u003e","products":[{"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":643.0,"currency_code":"CAD","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"},{"product_id":"ioptron-p-fa20-ca","title":"iOptron iAFS2 2'' Camera Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Cameras to 2\" Telescope Focusers\u003c\/li\u003e\n\u003cli\u003eProvides a Secure, Rigid Mounting Platform\u003c\/li\u003e\n\u003cli\u003eStandard T-Thread (M42x0.75) Camera Interface\u003c\/li\u003e\n\u003cli\u003eMatte Black Interior Minimizes Internal Reflections\u003c\/li\u003e\n\u003cli\u003eDurable All-Metal Construction\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 iAFS2 2'' Camera Adapter\u003c\/h2\u003e\n\u003cp\u003eThe iOptron iAFS2 2'' Camera Adapter provides the essential, rock-solid link between your camera and any telescope equipped with a 2-inch focuser. This adapter is engineered to create a secure, threaded connection, eliminating the flexure and potential tilt that can occur when using simpler set-screw holders. By ensuring your camera's sensor is held perfectly parallel to the focal plane, the iAFS2 is a fundamental component for achieving sharp, high-contrast astrophotos.\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\u003eSecure Camera Connection for 2\" Telescope Focusers\u003c\/h3\u003e\n\u003cp\u003eThe primary function of the iAFS2 adapter is to replace the standard 2\" eyepiece holder with a fully threaded, rigid connection point. The nosepiece slides into your telescope's focuser or visual back, while the threaded interface provides a secure attachment for your imaging train. This method is critical for astrophotography, as it prevents the camera from sagging or shifting during a long exposure, which would otherwise result in trailed or misshapen stars.\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\u003eStandardized Threads for Broad Camera Compatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for maximum compatibility, the iAFS2 features standard male T-threads (M42x0.75) on the camera side. This allows it to connect directly to the T-ring of virtually any DSLR or mirrorless camera, as well as to the front of most dedicated astronomy cameras and filter wheels. The interior of the adapter is machined with a matte black, non-reflective finish to absorb stray light and ensure your images have the darkest possible background.\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 purpose of the iOptron iAFS2 2'' Camera Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iOptron iAFS2 2'' Camera Adapter is designed to create a secure, rigid connection between a camera and a telescope's 2-inch focuser. It prevents camera tilt and flexure, which is essential for sharp, long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescopes can I use the iAFS2 adapter with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is compatible with any telescope that has a 2-inch focuser, visual back, or diagonal. This includes most Schmidt-Cassegrains, refractors, and Newtonian reflectors designed for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eTo connect my Canon or Nikon DSLR to the iAFS2, what else do I need?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need a \u003cstrong\u003eT-ring\u003c\/strong\u003e that is specific to your camera's lens mount (e.g., a Canon EOS T-ring or a Nikon F-mount T-ring). The T-ring attaches to your camera body in place of a lens, and the iAFS2 adapter then threads onto the T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the iAFS2 adapter improve my astrophotos?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy providing a solid, threaded connection, the iAFS2 adapter ensures your camera sensor remains perfectly aligned with the telescope's optics. It also features a blackened interior to absorb stray light. These two features lead to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper Stars:\u003c\/strong\u003e Eliminates tilt and flexure that can distort star shapes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e Prevents internal reflections from washing out faint details.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the iAFS2 2'' Camera Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe nosepiece of the iAFS2 adapter is typically threaded to accept standard 2-inch (M48) astronomy filters. This allows you to place a light pollution, nebula, or color filter directly in the light path before it reaches the camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the iAFS2 adapter suitable for a heavy camera and filter wheel setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iAFS2 is built with durable metal construction to provide a secure connection. While it offers a much more rigid solution than a simple set-screw holder, you should always ensure your telescope's focuser itself can handle the total weight of your imaging train (camera, filter wheel, off-axis guider, etc.) without slipping or flexing.\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\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":52917289484573,"sku":"IOP-P-FA20-CA","price":45.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-iAFS2-2-Camera-Adapter-1_3bd48439-5cc9-4e79-8460-fcd512e0ceee.jpg?v=1789141972"},{"product_id":"ioptron-fa30","title":"iOptron iAFS3 - 3-inch Inline Automatic Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e3-inch inline auto focuser with iLock™ technology\u003c\/li\u003e\n\u003cli\u003eSupports heavy imaging payloads up to 6kg\u003c\/li\u003e\n\u003cli\u003e68mm clear aperture minimizes vignetting\u003c\/li\u003e\n\u003cli\u003ePrecise 0.4um focusing resolution\u003c\/li\u003e\n\u003cli\u003e30mm of drawtube travel distance\u003c\/li\u003e\n\u003cli\u003eASCOM and INDI compliant for computer 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\u003eiOptron iAFS3 - 3-inch Inline Automatic Focuser\u003c\/h2\u003e\n\u003cp\u003eThe iOptron iAFS3 is a 3-inch inline automatic focuser engineered to eliminate mechanical shift, supporting imaging payloads up to 6kg with its patented iLock™ technology. A generous 68mm clear aperture provides unvignetted fields for large sensors, while the stepper motor achieves a focusing resolution of 0.4um over 30mm of travel. Weighing 1062g and featuring dual USB-C ports, the iAFS3 integrates seamlessly into advanced imaging setups requiring absolute focus stability.\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™ Technology: Zero-Shift Focusing for 6kg Payloads\u003c\/h3\u003e\n\u003cp\u003eAt the core of the iAFS3 is iOptron's iLock™ system, which uses a lead worm movement to passively lock the drawtube's position the instant the motor stops. This design prevents any focus drift or slippage, even when a heavy 6kg payload of a camera, filter wheel, and off-axis guider is pointed near the zenith. This mechanical certainty ensures that the focuser's precise 0.4um step size translates directly to sharp stars, without any backlash or flexure compromising your data.\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 System: ASCOM, Onboard Buttons, and Manual Override\u003c\/h3\u003e\n\u003cp\u003eThe iAFS3 offers three distinct methods of control for complete flexibility in the field. For fully automated sessions, it connects to your PC via one of two USB-C ports and is controlled through ASCOM or INDI drivers in software like NINA or SGP, using data from the built-in temperature sensor to maintain focus all night. For quick adjustments at the telescope, integrated motorized buttons allow for powered focusing without a computer, while a manual override wheel gives you tactile control for initial setup or situations where power is unavailable.\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\u003eEngineered for Large Imaging Trains: 68mm Aperture and 30mm of Travel\u003c\/h3\u003e\n\u003cp\u003eDesigned specifically for serious astrophotography, the iAFS3 features a large 68mm clear aperture to illuminate full-frame and larger sensors without vignetting. Its 30mm of drawtube travel provides sufficient range to achieve focus with various accessories and optical configurations. The focuser also includes a camera angle adjustment mechanism, allowing you to perfectly frame your target without disturbing the optical train. While a 2\" visual back is included, you will need to acquire the appropriate telescope-side adapter to match your specific instrument.\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 iAFS3 vs. iAFS2: Choosing the Right Focuser Size\u003c\/h3\u003e\n\u003cp\u003eThe primary difference between the iAFS3 and its 2-inch sibling, the iAFS2, is the clear aperture and intended application. The iAFS2 is a more compact and lighter option, ideal for smaller refractors and systems using APS-C or smaller sensors where the larger barrel of the iAFS3 is unnecessary.\u003c\/p\u003e\n\u003cp\u003eYou should choose the 3-inch iAFS3 when your imaging train involves a full-frame or larger format sensor, or when you are using a large aperture telescope where a 2-inch focuser would become a bottleneck in the light path. The iAFS3's 68mm clear aperture is essential for preventing vignetting and ensuring even illumination across these larger fields of view.\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 benefit of the iOptron iAFS3's iLock™ technology?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iLock™ technology uses a lead worm drive that passively locks the focuser's position when the motor is not moving. This completely prevents the drawtube from slipping or shifting under the weight of a heavy camera, ensuring your focus remains perfect regardless of the telescope's orientation. It's critical for maintaining sharpness during long exposures or automated imaging runs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the iOptron iAFS3 handle a heavy payload on a large SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iAFS3 is rated for a \u003cstrong\u003emaximum payload of 6kg (13.2 lbs)\u003c\/strong\u003e, making it more than capable of handling a typical imaging train with a cooled camera, large filter wheel, and off-axis guider. The rigid, all-metal body and iLock mechanism ensure there is no flexure or drift, even on a system with a moving primary mirror like a Schmidt-Cassegrain Telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the iOptron iAFS3 without a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The iAFS3 has two non-computer control methods. It features \u003cstrong\u003eonboard motorized focusing buttons\u003c\/strong\u003e for powered, push-button adjustments at the telescope. It also includes a \u003cstrong\u003emanual focusing wheel\u003c\/strong\u003e that overrides the motor, allowing for fine, tactile control without any power required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapters do I need to connect the iOptron iAFS3 to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iOptron iAFS3 does \u003cstrong\u003enot\u003c\/strong\u003e include a telescope-side adapter. You must purchase an adapter specifically designed to connect the iAFS3 to your telescope's particular rear thread or visual back type (e.g., M68, SCT 3.25\", etc.). iOptron offers a range of optional adapters to fit various OTAs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the built-in temperature sensor on the iAFS3?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe built-in temperature sensor allows automatic focusing software (via ASCOM\/INDI) to monitor ambient temperature changes throughout the night. As the temperature drops, the optical tube can contract, causing the focal point to shift. The software uses the sensor's data to trigger periodic refocusing routines, ensuring your images remain critically sharp from dusk till dawn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the iOptron iAFS3 cause vignetting with my full-frame camera on a fast refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iAFS3 is specifically designed to prevent vignetting in such scenarios. Its large \u003cstrong\u003e68mm clear aperture\u003c\/strong\u003e provides a wide, unobstructed light path that can fully illuminate sensors up to and beyond the standard 35mm full-frame format, even when used with fast optical systems.\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 Size\u003c\/td\u003e\n\u003ctd\u003e3\"\u003c\/td\u003e\n\u003c\/tr\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\u003eMaximum Payload\u003c\/td\u003e\n\u003ctd\u003e6kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e68mm\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\u003e0.4um\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\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\u003eManual Control\u003c\/td\u003e\n\u003ctd\u003eMotorized Buttons \u0026amp; Manual Override Wheel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e2x Type-C USB2.0\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\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e94 x 133 x 108mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1062g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight \u0026amp; Dimensions\u003c\/td\u003e\n\u003ctd\u003e4 lbs, 11 x 8 x 7 in\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\"\u003eiAFS3 Focuser Body\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\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":52917289779485,"sku":"IOP-FA30","price":755.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-iAFS3-iOptron-3-Inline-Automatic-Focuser-1_ece6b400-c720-4f0e-bc74-f72cf6d18645.jpg?v=1789141981"},{"product_id":"ioptron-p-fa30-ca","title":"iOptron iAFS3 3'' Camera Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e3-inch Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eProvides Secure Connection for Imaging Cameras\u003c\/li\u003e\n\u003cli\u003eMinimizes Flexure in the Optical Train\u003c\/li\u003e\n\u003cli\u003eDesigned for Large Format Focusers\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\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 iAFS3 3'' Camera Adapter\u003c\/h2\u003e\n      \u003cp\u003eThe iOptron iAFS3 3'' Camera Adapter creates a rigid, large-format connection point between your telescope's 3-inch focuser and your imaging camera, essential for eliminating flexure with heavy payloads.\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\u003eA Secure 3\" Connection for Your Imaging Train\u003c\/h3\u003e\n      \u003cp\u003eFor imagers using full-frame sensors or heavy camera packages, a standard 2-inch connection can introduce tilt and flexure, resulting in distorted stars at the edge of the field. The iAFS3 3'' Camera Adapter addresses this by providing a larger, more robust interface that locks your camera securely to the optical axis. This ensures your entire imaging train—from focuser to sensor—remains perfectly aligned throughout an exposure.\u003c\/p\u003e\n      \u003cp\u003eThe larger 3-inch barrel also helps prevent vignetting on large sensors, ensuring the field is fully illuminated. While this adapter requires a compatible 3-inch focuser or rotator, it is a critical component for building a stable, wide-field imaging system capable of producing professional-quality results.\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\"\u003eWhat is the primary purpose of the iOptron iAFS3 3'' Camera Adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary purpose of the \u003cstrong\u003eiOptron iAFS3 3'' Camera Adapter\u003c\/strong\u003e is to provide a secure, large-diameter connection between a telescope's 3-inch focuser and an astrophotography camera. This minimizes mechanical flexure and ensures optimal alignment for imaging.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I choose a 3'' adapter like the iAFS3 over a smaller 2'' adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA 3-inch adapter like the iAFS3 offers significantly more rigidity than a 2-inch equivalent, which is crucial when using heavy cameras or filter wheels. The larger diameter also provides a wider, unvignetted light path for illuminating large, full-frame imaging sensors.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of imaging setup benefits most from the iAFS3 3'' Camera Adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eSetups using \u003cstrong\u003elarge-format CMOS or CCD cameras\u003c\/strong\u003e (such as full-frame or larger) benefit most from the iAFS3. It is ideal for wide-field refractors or astrographs where maintaining a flat, fully illuminated field is critical for capturing large deep-sky objects like the North America Nebula (NGC 7000).\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the iAFS3 3'' Camera Adapter help prevent image defects?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eBy creating a solid, non-flexing connection, the iAFS3 helps prevent common image defects like \u003cstrong\u003estar elongation\u003c\/strong\u003e or \u003cstrong\u003efield tilt\u003c\/strong\u003e. These issues are often caused by the weight of the camera package pulling on a smaller, less secure adapter during a long exposure.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the iAFS3 3'' Camera Adapter compatible with any telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, the iAFS3 is specifically designed for telescopes equipped with a \u003cstrong\u003e3-inch focuser\u003c\/strong\u003e or accessory port. It will not fit standard 1.25-inch or 2-inch focusers without additional, specialized adapters which may re-introduce flexure.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhen imaging large targets like the Andromeda Galaxy (M31) with a fast refractor, how does the iAFS3 help?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor a large target like the Andromeda Galaxy (M31), you would typically use a full-frame sensor to capture its full extent. The iAFS3 3'' Camera Adapter ensures that the large sensor is fully illuminated by the telescope's optics without vignetting, preserving brightness and detail across the entire frame.\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\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":52917289877789,"sku":"IOP-P-FA30-CA","price":55.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-iAFS3-3-Camera-Adapter-1_ec4dccc7-9829-4a69-9576-766d09b117c6.jpg?v=1789141990"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/ioptron-iafs-inline-automatic-focusers.oembed","provider":"David Astro","version":"1.0","type":"link"}