{"title":"Starlight Instruments Electronic Focusers","description":"\u003cp\u003eStarlight Instruments electronic focusers motorize focusing so you can reach critical focus without touching the telescope, or let imaging software refocus automatically. The range includes the Focuser Boss II controller, the Handy Stepper Motor with manual override, the Posi Drive motor system and a motorized Gen II 3.0\" Feather Touch.\u003c\/p\u003e\u003cp\u003eAdd-ons include wireless control, a hand controller, a two-focuser board upgrade and a focus motor for RedCat and SpaceCat refractors.\u003c\/p\u003e","products":[{"product_id":"starlight-instruments-universal-dovetail-camera-mount-w-focuser-boss-ii-digital-kit","title":"Starlight Instruments Universal Dovetail Camera Mount w\/ Focuser Boss II Digital Kit","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003eThis Dovetail Camera mount with Focuser Boss II digital kit allows for controlling your\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e lens with a Helical focuser for any DSLR cameras via PC or Hand Paddle and now there is no need to adjust the camera manually.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003eThis kit includes the base, 1 motor mount bracket, \u003cspan\u003e2 stop blocks, motor belt, Digital Hub, Feather Touch Motor, Hand Paddle, and all associated hardware.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cspan\u003eInstallation Instructions\u003c\/span\u003e\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003ePlease click the below link to view a photo taken at the Winter Star Party with the Starlight Camera Mount.  Credit for the photo goes to Richard Wright.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003ePhoto\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnown To Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDSLR Cameras\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Starlight Instruments","offers":[{"title":"Standard Motor","offer_id":44967287390493,"sku":"SI-Dovetail-FB-II-01","price":1568.0,"currency_code":"CAD","in_stock":true},{"title":"Handy Motor","offer_id":44967287423261,"sku":"SI-Dovetail-FB-II-02","price":1652.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Universal-Dovetail-Camera-Mount-Focuser-Boss-II-Digital-Kit-SI-Dovetail-FB-II-1__76166.1596314018.1280.1280.jpg?v=1684339989"},{"product_id":"starlight-instruments-wireless-control-of-electronic-focuser","title":"Starlight Instruments Wireless Control Of Electronic Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 802.11 WiFi capability to the Focuser Boss II\u003c\/li\u003e\n\u003cli\u003eControl your focuser from any smartphone, tablet, or computer\u003c\/li\u003e\n\u003cli\u003eBrowser-based interface requires no dedicated app\u003c\/li\u003e\n\u003cli\u003eSupports direct connection (ad-hoc) for field use\u003c\/li\u003e\n\u003cli\u003eCan join an existing network for observatory integration\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\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\u003eStarlight Instruments Wireless Control Of Electronic Focuser\u003c\/h2\u003e\n\u003cp\u003eUpgrade your Starlight Instruments Focuser Boss II with the Wireless Control module, adding 802.11 WiFi for complete, cable-free command of your focusing system from any web-enabled smartphone or tablet.\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\u003e802.11 WiFi Upgrade: Control Your Focuser from Any Browser\u003c\/h3\u003e\n\u003cp\u003eThis 802.11 WiFi module integrates directly with the Focuser Boss II, eliminating the need for a physical data cable to your control computer. Because the Starlight Instruments Wireless Control Of Electronic Focuser hosts its own web interface, no dedicated app is required. Simply connect your device to the network and open a browser to access all focusing controls.\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\u003eDual-Mode Networking: Direct Connection or Observatory Integration\u003c\/h3\u003e\n\u003cp\u003eThe module supports two connection modes for maximum flexibility. For portable setups, it can create its own local WiFi network, allowing you to connect your phone or tablet directly to the Focuser Boss II in the field. For permanent observatories, it can join your existing wireless network, making the focuser a seamless part of your integrated imaging system.\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\"\u003eDo I need an app to use the Starlight Instruments Wireless Focuser Control?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The WiFi module hosts its own web page for control. You connect your device (smartphone, tablet, etc.) to the Focuser Boss II's WiFi network and navigate to its IP address in any standard web browser, such as Safari or Chrome, to access the controls.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Starlight Instruments Wireless Control at a dark sky site without internet?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The module can create its own self-contained WiFi network (ad-hoc mode). This allows you to connect your control device directly to the Focuser Boss II without needing a router or any other network infrastructure, making it ideal for use in the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Wireless Control module work in a permanent observatory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a permanent setup, you can configure the module to join your existing observatory WiFi network (infrastructure mode). This is the recommended method for fixed installations, as it allows you to control the focuser from any computer or device connected to that same network.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Starlight Instruments WiFi module compatible with the original Focuser Boss?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this wireless upgrade is designed specifically for the Starlight Instruments \u003cstrong\u003eFocuser Boss II Electronic Focuser\u003c\/strong\u003e. It is not compatible with earlier models or other control systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat wireless standard does the Starlight Instruments WiFi module use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe module uses the \u003cstrong\u003e802.11\u003c\/strong\u003e wireless standard, ensuring broad compatibility with modern smartphones, tablets, and laptops.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the Starlight Instruments Wireless Control module installed?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis module is a user-installable internal board for the Focuser Boss II hub. Installation requires opening the hub and connecting the module to the main board. Please refer to the official Starlight Instruments installation guide for detailed instructions.\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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eFocuser Boss II Electronic Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless Standard\u003c\/td\u003e\n\u003ctd\u003e802.11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"Default Title","offer_id":44967287783709,"sku":"SI-FB-WiFi","price":266.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Wireless-Control-Of-Electronic-Focuser-FB-WiFi-1__38719.1596314019.1280.1280.jpg?v=1684340000"},{"product_id":"starlight-instruments-focuser-boss-ii-electronic-focusing-control","title":"Starlight Instruments Focuser Boss II Electronic Focusing Control","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eControls 1 or 2 focusers from a single digital hub\u003c\/li\u003e\n\u003cli\u003eConnects via USB, Serial, and wired Ethernet standard\u003c\/li\u003e\n\u003cli\u003eOptional 802.11 WiFi for complete wireless operation\u003c\/li\u003e\n\u003cli\u003eASCOM Local Server allows multiple clients to connect simultaneously\u003c\/li\u003e\n\u003cli\u003ePowers HSM20, HSM30, and HSM35 stepper motors\u003c\/li\u003e\n\u003cli\u003ePowered by 12VDC for field or observatory 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\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\u003eStarlight Instruments Focuser Boss II Electronic Focusing Control\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments Focuser Boss II is a complete command center for automated astronomical focusing, controlling up to 2 separate focusers from a single 12VDC hub. It integrates seamlessly with your existing imaging setup via standard USB, Serial, or wired Ethernet, with an optional 802.11 WiFi module for fully remote operation. The system is built around a powerful ASCOM Local Server, allowing multiple software applications to access the focuser simultaneously without conflict.\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 Hub: Centralized Control via USB, Ethernet, and 802.11 WiFi\u003c\/h3\u003e\n\u003cp\u003eThe Focuser Boss II hub eliminates the complexity of managing multiple focus controllers. It offers three standard wired connectivity options—Serial, USB, and Ethernet—ensuring compatibility with any observatory or field computer setup. For ultimate remote-imaging freedom, an optional 802.11 WiFi board can be added at any time, allowing you to control focus from a tablet or smartphone via the built-in web interface.\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\u003eUniversal Software Support: ASCOM, TheSkyX, and Multi-Client Access\u003c\/h3\u003e\n\u003cp\u003eDesigned for the modern imager, the Focuser Boss II works natively with all ASCOM-compliant software like Sequence Generator Pro, N.I.N.A., Maxim DL, and FocusMax. Its ASCOM Local Server is a key distinction, permitting you to run your autofocus routine in one program while making manual adjustments in another, simultaneously. Mac users are fully supported through TheSkyX (build 7315 or later) and Equinox, ensuring robust cross-platform operation.\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\u003eHSM Motor Compatibility: Precision Drive for 2.0\" to 4.0\" Focusers\u003c\/h3\u003e\n\u003cp\u003eThe Focuser Boss II drives Starlight Instruments' high-resolution Handy Stepper Motors (HSM), with options to match nearly any Feather Touch or upgraded Astro-Physics focuser. This is not a one-size-fits-all system; you select the motor that precisely matches your hardware for optimal torque and performance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM20 Motor:\u003c\/strong\u003e Fits Feather Touch Micro Focusers, retrofit pinion assemblies, and 2.0\" Crayford focusers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM30 Motor:\u003c\/strong\u003e Fits 2.5\", 3.0\", and 2.0\" Feather Touch Rack \u0026amp; Pinion models, plus Astro-Physics 2.7\" focusers with the FT pinion upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM35 Motor:\u003c\/strong\u003e Fits large 3.5\" Feather Touch focusers and the Astro-Physics 3.5\" and 4.0\" focusers with FT pinion upgrades.\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\u003eAutomated Imaging: Temperature Compensation and 2-Focuser Control\u003c\/h3\u003e\n\u003cp\u003eFor unattended imaging, the Focuser Boss II supports an optional temperature sensor that enables automatic focus compensation, adjusting for thermal shifts throughout the night. With the optional second focuser board, the system can command two focusers independently from the same hub—perfect for managing a primary imaging scope and a separate guidescope focuser, eliminating the need for a second controller and extra cables.\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 software is compatible with the Focuser Boss II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Focuser Boss II is compatible with any \u003cstrong\u003eASCOM-compliant software\u003c\/strong\u003e on Windows, including popular applications like Sequence Generator Pro (SGP), N.I.N.A., Maxim DL, and FocusMax. For macOS users, it is fully supported in \u003cstrong\u003eTheSkyX\u003c\/strong\u003e (daily build 7315 or later) and Equinox. You can also control it from any device with a web browser using its built-in web server.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the Focuser Boss II without a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With the optional \u003cstrong\u003eHand Controller\u003c\/strong\u003e, you can make manual focus adjustments using push buttons directly at the telescope. Additionally, if you install the optional \u003cstrong\u003e802.11 WiFi module\u003c\/strong\u003e, you can connect to the Focuser Boss II from a smartphone or tablet and use the web interface to control the focuser without a dedicated PC.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right HSM motor for my 3.5\" Feather Touch focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a 3.5\" Feather Touch focuser, you need the \u003cstrong\u003eHSM35 motor\u003c\/strong\u003e. This motor is specifically designed to provide the necessary torque for moving the larger drawtube and heavier imaging loads associated with 3.5\" and 4.0\" class focusers from both Starlight Instruments and Astro-Physics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the temperature compensation on the Focuser Boss II work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith the optional \u003cstrong\u003eTemperature Sensor\u003c\/strong\u003e attached, the Focuser Boss II system monitors ambient temperature. As the temperature changes during an imaging session, which causes the telescope's optical tube to expand or contract, the ASCOM driver automatically adjusts the focus position by a pre-calibrated amount to maintain perfect focus without manual intervention.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Focuser Boss II control two focusers at once?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The standard Focuser Boss II hub controls one focuser. By installing the optional \u003cstrong\u003e2nd Focuser Control Board\u003c\/strong\u003e, you can control two Feather Touch focusers simultaneously and independently from the same hub. This is ideal for dual-rig setups or managing a main focuser and a guide scope focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat power options are available for the Focuser Boss II in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Focuser Boss II requires \u003cstrong\u003e12VDC\u003c\/strong\u003e power. While an AC\/DC power supply is available for home or observatory use, for field operation you can power it using the optional \u003cstrong\u003eDC Cigarette Lighter Plug Cable\u003c\/strong\u003e connected to a portable 12V battery pack or power tank.\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\u003eFocusers Controlled\u003c\/td\u003e\n\u003ctd\u003e1 (standard), or 2 with optional 2nd focuser board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eSerial, USB (cable supplied), wired Ethernet, optional 802.11 WiFi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Compatibility\u003c\/td\u003e\n\u003ctd\u003eASCOM Local Server (multiple clients), TheSkyX, Equinox, Web Browser, Android\/iPhone Apps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSM20 Motor Compatibility\u003c\/td\u003e\n\u003ctd\u003eFeather Touch Micro Focusers, retrofit pinion assemblies, and 2.0\" Feather Touch Crayford focusers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSM30 Motor Compatibility\u003c\/td\u003e\n\u003ctd\u003e2.5\", 3.0\", \u0026amp; 2.0\" Feather Touch Rack\/Pinion focusers, and Astro-Physics 2.7\" with FT pinion upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSM35 Motor Compatibility\u003c\/td\u003e\n\u003ctd\u003e3.5\" Feather Touch focusers, and Astro-Physics 3.5\" \u0026amp; 4.0\" with FT pinion upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Power Options\u003c\/td\u003e\n\u003ctd\u003eAC\/DC Power Supply, DC Cigarette Plug, European Power Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_Focuser_Boss_II_Installation_Setup_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"AC\/DC Power Supply 12VDC \/ Starlight Instruments Wireless Control Of Electronic Focuser \/ Starlight Instruments Hand Controller for Manual Focuser Control","offer_id":44967287849245,"sku":"SI-FB-II KIT 1-01","price":504.0,"currency_code":"CAD","in_stock":true},{"title":"DC Cigarette Plug \/ Starlight Instruments Wireless Control Of Electronic Focuser \/ Starlight Instruments Hand Controller for Manual Focuser Control","offer_id":44967287882013,"sku":"SI-FB-II KIT 1-02","price":504.0,"currency_code":"CAD","in_stock":true},{"title":"European Power Adapter for AC Cable \/ Starlight Instruments Wireless Control Of Electronic Focuser \/ Starlight Instruments Hand Controller for Manual Focuser Control","offer_id":44967287914781,"sku":"SI-FB-II KIT 1-03","price":518.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Focuser-Boss-II-Electronic-Focusing-Control-FB-IIKIT1-1__28310.1596314019.1280.1280.jpg?v=1684340006"},{"product_id":"starlight-instruments-circuit-board-upgrade-for-controlling-2-focusers-at-the-same-time","title":"Starlight Instruments Circuit Board Upgrade for Controlling 2 Focusers at the Same Time","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables Control of 2 Focusers Simultaneously\u003c\/li\u003e\n\u003cli\u003eDesigned for the Starlight Instruments Focuser Boss II Controller\u003c\/li\u003e\n\u003cli\u003eStreamlines Dual-Telescope and Guidescope Setups\u003c\/li\u003e\n\u003cli\u003eEliminates the Need for a Second Focuser 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\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\u003eStarlight Instruments Circuit Board Upgrade for Controlling 2 Focusers at the Same Time\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments Circuit Board Upgrade enables your Focuser Boss II to control 2 focusers simultaneously from one hub. This expansion to 2 channels is essential for imagers running a main telescope and a separate, motorized guidescope without adding a second controller.\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\u003eControl 2 Focusers from a Single Focuser Boss II Hub\u003c\/h3\u003e\n\u003cp\u003eFor advanced astrophotography, particularly with dual-instrument setups, managing two separate focusers can be cumbersome. This circuit board upgrade installs directly into the Starlight Instruments Focuser Boss II hub, unlocking its second focuser port. This allows your ASCOM-compatible software or the Focuser Boss II hand controller to manage both your primary imaging train and a secondary motorized focuser on a guidescope or parallel instrument.\u003c\/p\u003e\n\u003cp\u003eThe result is a streamlined, fully automated system where both optical paths can be focused independently without requiring a second control box, power supply, or USB connection to your computer. Please note that a second stepper motor (such as the HSM20, HSM30, or PDMS) is required to drive the second focuser and must be purchased separately.\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 purpose of the Starlight Instruments 2-Focuser Circuit Board Upgrade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis circuit board is an internal upgrade for the \u003cstrong\u003eStarlight Instruments Focuser Boss II\u003c\/strong\u003e control hub. It activates the second focuser port, allowing you to control two separate motorized focusers from the single controller, which is ideal for complex imaging rigs with a main scope and a guidescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich controller is this 2-Focuser Circuit Board Upgrade compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis upgrade board is designed exclusively for the \u003cstrong\u003eStarlight Instruments Focuser Boss II\u003c\/strong\u003e electronic focusing system. It will not work with other Starlight Instruments controllers like the EFS or controllers from other manufacturers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need anything else to control a second focuser with this upgrade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This product is only the circuit board. To control a second focuser, you must also have a second \u003cstrong\u003eStarlight Instruments stepper motor\u003c\/strong\u003e (like the HSM or PDMS models) and the necessary cables. The motor is not included with this upgrade board.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this 2-Focuser Upgrade simplify imaging a target like the Rosette Nebula (NGC 2244) with a guidescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen imaging a large target like the Rosette Nebula (NGC 2244), maintaining perfect focus on both your main imaging telescope and your off-axis guider or separate guidescope is critical. This board allows your automation software (like N.I.N.A. or SGP) to run autofocus routines on both optical paths independently from one hub, ensuring both your main stars and guide stars remain perfectly sharp throughout the night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Starlight Instruments upgrade to control a main focuser and a filter wheel focuser on my Ritchey-Chrétien telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is an excellent use case. If you have a motorized focuser on your Ritchey-Chrétien telescope and a second motor on a device that adjusts for filter offsets, the Focuser Boss II with this 2-focuser upgrade can manage both. Your software can be configured to use one channel for primary focus and the second to make precise adjustments when the filter changes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the installation of this 2-Focuser Circuit Board difficult?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation requires opening the Focuser Boss II controller housing and seating the board onto the main controller. While it is generally straightforward for users comfortable with electronics, it requires care to avoid static discharge and ensure correct placement. Always refer to the official Starlight Instruments Focuser Boss II manual before attempting installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_Focuser_Boss_II_Installation_Setup_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"Default Title","offer_id":44967287947549,"sku":"SI-FB-II 2nd FOCUSER","price":56.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Circuit-Board-Upgrade-for-Controlling-2-Focusers-At-The-Same-Time-FB-II2ndFOCUSER-1__21959.1596314020.1280.1280.jpg?v=1684340009"},{"product_id":"starlight-instruments-electronic-focusing-system","title":"Starlight Instruments Electronic Focusing System","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eASCOM compliant driver for use with all major imaging software\u003c\/li\u003e\n\u003cli\u003eAdvanced automation including backlash and temperature compensation\u003c\/li\u003e\n\u003cli\u003eTactile hand controller with selectable 1, 10, or 100-step increments\u003c\/li\u003e\n\u003cli\u003eCompact control box measures just 4.13\" x 2.87\" x 1.1\"\u003c\/li\u003e\n\u003cli\u003eCompatible with HSM20, HSM30, and HSM35 stepper motors\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\u003eStarlight Instruments Electronic Focusing System (EFS)\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments Electronic Focusing System (EFS) is a dedicated ASCOM-compliant stepper motor controller designed for absolute focusing precision. Its compact control hub measures just 4.13\" long by 2.87\" wide, providing advanced features like temperature compensation and backlash correction without adding bulk to your imaging rig. The included hand controller allows for immediate tactile adjustments, with selectable step sizes of 1, 10, or 100 steps per detent for moving from coarse focus to critical final tweaks.\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 4.13\" x 2.87\" ASCOM-Compliant Digital Hub\u003c\/h3\u003e\n\u003cp\u003eAt the core of the EFS is a lightweight and robust digital hub that serves as the interface between your PC and focuser motor. It connects via a standard USB cable and is managed by a dedicated ASCOM driver, ensuring seamless integration with virtually all modern astrophotography software suites like N.I.N.A., Sequence Generator Pro, and TheSkyX.\u003c\/p\u003e\n\u003cp\u003eThe hub's small 4.13\" x 2.87\" x 1.1\" footprint makes it ideal for portable setups where space and weight are critical. All connections are logically placed, with power, USB, and hand controller inputs on the rear and the motor output on the front, keeping cable management clean and simple.\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\u003eIntuitive Hand Control: 1, 10, and 100-Step Adjustments\u003c\/h3\u003e\n\u003cp\u003eFor moments when you need direct, computer-free control, the EFS includes a tactile hand controller. A simple press of the central knob cycles through three resolution levels, indicated by an LED: Red for 1-step fine adjustments, Amber for 10-step increments, and Green for 100-step coarse movements. This allows you to quickly rack the focuser out to change eyepieces and then dial in perfect focus without ever touching your laptop.\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 Focusing: Temperature and Backlash Compensation\u003c\/h3\u003e\n\u003cp\u003eThe EFS is built for serious imaging. Its ASCOM driver enables sophisticated automation routines that directly address the two most common causes of soft stars during a long session. Backlash compensation ensures your autofocus V-curves are perfectly symmetrical and repeatable, while temperature compensation uses an external probe to automatically adjust focus as ambient temperature drops, maintaining sharp stars from dusk till 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\u003eEFS vs. Focuser Boss II: A Guide to Starlight Instruments Controllers\u003c\/h3\u003e\n\u003cp\u003eStarlight Instruments offers two electronic focusing controllers, each tailored to different needs. The EFS is the streamlined, single-focuser solution perfect for portable rigs or dedicated single-scope imagers. It provides all the essential automation features in a compact, cost-effective package.\u003c\/p\u003e\n\u003cp\u003eThe Focuser Boss II, by contrast, is a full observatory-grade hub. It offers dual-focuser control, native Ethernet and optional WiFi connectivity for remote access, and a more expansive feature set for permanent installations. For imagers who need a simple, robust, and precise single-channel controller, the Electronic Focusing System is the optimal choice.\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 software is compatible with the Starlight Instruments EFS?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Electronic Focusing System uses an \u003cstrong\u003eASCOM driver\u003c\/strong\u003e, making it compatible with any software that adheres to the ASCOM standard. This includes popular astrophotography applications like N.I.N.A., Sequence Generator Pro (SGP), TheSkyX, Maxim DL, and more.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich Starlight Instruments motor do I need for my EFS and telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe correct motor depends on your focuser. The EFS is compatible with all Starlight Instruments HSM motors.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM20:\u003c\/strong\u003e Fits Feather Touch Micro Focusers, retrofit pinion assemblies, and Crayford focusers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM30:\u003c\/strong\u003e Fits 2.5\", 3.0\", and 2.0\" Rack\/Pinion focusers, as well as Astro-Physics 2.7\" focusers with the Feather Touch upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM35:\u003c\/strong\u003e Fits 3.5\" Feather Touch focusers, and Astro-Physics 3.5\" and 4.0\" focusers with the Feather Touch upgrade.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the EFS hand controller change step sizes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can change the step size by pressing the knob on the hand controller. Each press cycles through the three settings, which are confirmed by a colored LED light: \u003cstrong\u003eRed for 1 step\u003c\/strong\u003e, \u003cstrong\u003eAmber for 10 steps\u003c\/strong\u003e, and \u003cstrong\u003eGreen for 100 steps\u003c\/strong\u003e per detent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Starlight Instruments EFS run without a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While its advanced automation features require a computer running ASCOM software, the EFS can be operated manually for visual use or initial setup using only the included hand controller and a power source. This allows you to achieve precise focus at the eyepiece without being connected to a PC.\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) with my C11. How does the EFS prevent focus drift as it gets colder?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe EFS features \u003cstrong\u003etemperature compensation\u003c\/strong\u003e. When used with a temperature probe, the system monitors ambient temperature changes throughout your imaging session. As the telescope's optical tube contracts in the cold, the EFS automatically makes micro-adjustments to the focus position to counteract the thermal shift, ensuring your stars remain pinpoint sharp on every sub-exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen running an autofocus routine in N.I.N.A. on my refractor, how does the EFS ensure accuracy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe EFS driver includes \u003cstrong\u003ebacklash correction\u003c\/strong\u003e. This feature commands the motor to overshoot a target position and then approach it from the same direction every time, eliminating any mechanical play or \"slop\" in the focuser's gear train. This results in highly repeatable V-curves and ensures your autofocus routine calculates the critical focus zone with maximum accuracy.\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\u003eMotor Compatibility (HSM20)\u003c\/td\u003e\n\u003ctd\u003eFeather Touch Micro Focuser, retrofit pinion assembly upgrades, and Crayford focusers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Compatibility (HSM30)\u003c\/td\u003e\n\u003ctd\u003e2.5\", 3.0\" \u0026amp; 2.0\" Feather Touch Rack\/Pinion focusers; Astro-Physics 2.7\" with FT pinion upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Compatibility (HSM35)\u003c\/td\u003e\n\u003ctd\u003e3.5\" Feather Touch focusers; Astro-Physics 3.5\" \u0026amp; 4.0\" with FT pinion upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Box Dimensions\u003c\/td\u003e\n\u003ctd\u003e4.13\" (105mm) L x 2.87\" (73mm) W x 1.1\" (28mm) H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd\u003ePower, hand controller, USB (rear); focuser (front)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware\u003c\/td\u003e\n\u003ctd\u003eASCOM driver (requires ASCOM Platform 6 or later)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHand Controller Step Sizes\u003c\/td\u003e\n\u003ctd\u003e1, 10 or 100 steps per detent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutomated Features\u003c\/td\u003e\n\u003ctd\u003eBacklash correction, temperature compensation, focus lock, motor braking, multiple speeds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Options\u003c\/td\u003e\n\u003ctd\u003eAC\/DC Power Supply 12V DC, DC Cigarette Plug, European Power Adapter (selected at purchase)\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\"\u003eEFS Control Hub\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\"\u003eEFS Hand Controller\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\"\u003eUSB Cable (A to B)\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\"\u003eEthernet Cable (Hub to Motor)\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\"\u003eRJ11 Cable (Hub to Hand Controller)\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\u003cem\u003eNote: A compatible Starlight Instruments HSM motor and a 12V DC power supply are required and sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_EFS_Brochure.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"AC\/DC Power Supply 12V DC","offer_id":44967287980317,"sku":"SI-EFS-01","price":420.0,"currency_code":"CAD","in_stock":true},{"title":"DC Cigarette Plug","offer_id":44967288013085,"sku":"SI-EFS-02","price":420.0,"currency_code":"CAD","in_stock":true},{"title":"European Power Adapter for AC Cable","offer_id":44967288045853,"sku":"SI-EFS-03","price":434.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-EFS__77086.1656510665.1280.1280.jpg?v=1684340010"},{"product_id":"starlight-instruments-hand-controller-for-manual-focuser-control","title":"Starlight Instruments Hand Controller for Manual Focuser Control","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides manual focus control for the Focuser Boss II system\u003c\/li\u003e\n\u003cli\u003eTactile push-button interface for use at the eyepiece\u003c\/li\u003e\n\u003cli\u003eIdeal for quick visual adjustments and initial focus finding\u003c\/li\u003e\n\u003cli\u003eComplements automated software 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\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\u003eStarlight Instruments Hand Controller for Manual Focuser Control\u003c\/h2\u003e\n\u003cp\u003eThis Starlight Instruments Hand Controller is the dedicated manual interface for any telescope equipped with the Focuser Boss II electronic focusing system. It allows for direct, tactile adjustments via integrated push buttons, giving you precise control at the eyepiece without needing to interact with a computer screen or mouse, streamlining your workflow for both visual observation and imaging.\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\u003eTactile Focuser Control for the Focuser Boss II\u003c\/h3\u003e\n\u003cp\u003eDesigned exclusively for the Focuser Boss II, this hand controller provides an essential ergonomic upgrade to your focusing setup. By plugging directly into the control hub, you gain immediate, responsive push-button command over your electronic focuser. This is indispensable for visual observers who need to make rapid focus changes when swapping eyepieces or for imagers seeking to quickly establish rough focus before initiating an automated routine.\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\u003eHand Controller vs. Software: Why You Need Both\u003c\/h3\u003e\n\u003cp\u003eWhile the Focuser Boss II's software capabilities are unmatched for automated, temperature-compensated focusing runs, a physical hand controller serves a different and vital role. Software control requires a laptop at the scope, which can be cumbersome in the dark and disruptive to dark adaptation.\u003c\/p\u003e\n\u003cp\u003eThe hand controller offers immediate, \"no-look\" operation. It allows you to keep your eye at the eyepiece while making fine adjustments, ensuring you never lose your target. It complements, rather than replaces, software control by providing a faster, more intuitive interface for the manual adjustments you make throughout an observing session.\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 Starlight Instruments Hand Controller used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis hand controller provides manual, push-button focusing for telescopes using the \u003cstrong\u003eStarlight Instruments Focuser Boss II\u003c\/strong\u003e electronic focusing system. It allows you to make precise adjustments at the eyepiece without using a computer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Starlight Instruments Hand Controller compatible with the EFS or Posi Drive systems?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This controller is designed specifically for the \u003cstrong\u003eFocuser Boss II\u003c\/strong\u003e system. It is not compatible with other Starlight Instruments electronic focusers like the EFS (Electronic Focusing System) unless they are being controlled by the Focuser Boss II hub.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect the Hand Controller to my Focuser Boss II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Hand Controller connects directly to the dedicated port on the Focuser Boss II control hub. This provides both power and data communication, allowing for immediate use once plugged in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Hand Controller to achieve critical focus for imaging the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis controller is excellent for quickly finding \u003cstrong\u003einitial focus\u003c\/strong\u003e on bright stars near your target. However, for achieving the most critical focus required for high-resolution imaging, an automated software routine (like a V-curve analysis) run through the Focuser Boss II's ASCOM driver will deliver more precise and repeatable results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen observing Jupiter with my SCT, is it faster to use the Starlight Hand Controller or the software?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor quick adjustments while visually observing planets like Jupiter, the \u003cstrong\u003eStarlight Instruments Hand Controller is significantly faster\u003c\/strong\u003e and more intuitive. It allows you to tweak focus in real-time as atmospheric seeing changes, without ever taking your eye from the eyepiece or fumbling with a laptop in the dark.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Hand Controller replace the need for software control of the Focuser Boss II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it complements it. The hand controller is ideal for manual and visual use, while software control is necessary for advanced functions like \u003cstrong\u003eautofocusing routines, temperature compensation, and remote operation.\u003c\/strong\u003e Most users employ both for a complete focusing 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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eFocuser Boss II Electronic Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"Default Title","offer_id":44967288078621,"sku":"SI-FB-HANDCONTROLLER","price":280.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Hand-Controller-for-Manual-Focuser-Control-FB-HANDCONTROLLER-1__66042.1596314021.1280.1280.jpg?v=1684340013"},{"product_id":"starlight-instruments-handy-stepper-motor-w-manual-focus-over-ride","title":"Starlight Instruments Handy Stepper Motor w\/ Manual Focus Over-Ride","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds automated, repeatable focusing to your telescope\u003c\/li\u003e\n\u003cli\u003eFeatures a simple manual focus override knob\u003c\/li\u003e\n\u003cli\u003eBuilt-in thermistor for temperature-compensated focusing\u003c\/li\u003e\n\u003cli\u003eDesigned for the Starlight Instruments Focuser Boss II and EFS\u003c\/li\u003e\n\u003cli\u003eAvailable in three models (HSM20, HSM30, HSM35) for broad compatibility\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\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\u003eStarlight Instruments Handy Stepper Motor w\/ Manual Focus Over-Ride\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments Handy Stepper Motor (HSM) adds precise, automated control to high-end focusers for critical astrophotography. Designed to integrate seamlessly with the Focuser Boss II controller, the HSM series includes the HSM20 for Feather Touch Micro and Crayford focusers, the HSM30 for 2.5\" and 3.0\" rack and pinion models, and the HSM35 for large 3.5\" and 4.0\" focusers. Each model features a built-in temperature sensor and an innovative manual override, allowing instant switching between automated and hands-on control without tools.\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 Focusing with an Instant Manual Override\u003c\/h3\u003e\n\u003cp\u003eThe core design of the Handy Stepper Motor delivers the precision of automated focusing without sacrificing the immediate, tactile control of manual adjustment. A simple turn of the override knob on the motor housing disengages the stepper motor, allowing you to use the focuser's own knobs as you normally would. This is invaluable for initial setup, quick visual checks, or when your control computer is not connected, providing a robust and field-ready solution.\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\u003eIntegrated Temperature Compensation for Imaging Sessions\u003c\/h3\u003e\n\u003cp\u003eAs ambient temperature changes throughout an imaging session, a telescope's metal tube contracts, causing focus to shift and stars to bloat. The Handy Stepper Motor contains a built-in temperature thermistor that feeds real-time data to your Focuser Boss II or EFS controller. This enables the system to make automatic, microscopic adjustments to maintain perfect focus all night, ensuring your long-exposure images remain critically sharp from beginning to end.\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\u003eHSM20, HSM30 \u0026amp; HSM35: A Motor for Every Feather Touch Focuser\u003c\/h3\u003e\n\u003cp\u003eStarlight Instruments offers the HSM in three distinct models to ensure a perfect fit and optimal torque for a wide range of high-end focusers. This component-specific approach guarantees reliable, slip-free operation whether you are controlling a lightweight visual setup or a heavy imaging train.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM20 Fits:\u003c\/strong\u003e All Feather Touch Micro Focusers for SCTs, retrofit pinion assemblies, and Feather Touch Crayford focusers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM30 Fits:\u003c\/strong\u003e 2.5\", 3.0\", and 2.0\" Feather Touch Rack \u0026amp; Pinion focusers, as well as the 2.7\" Astro-Physics focuser with a Feather Touch pinion upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHSM35 Fits:\u003c\/strong\u003e The largest 3.5\" Feather Touch focusers and the 3.5\" and 4.0\" Astro-Physics focusers equipped with a Feather Touch pinion upgrade.\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\u003eStarlight Instruments HSM vs. PDMS: Choosing Your Motor Drive\u003c\/h3\u003e\n\u003cp\u003eStarlight Instruments offers two motor systems, the direct-drive HSM and the belt-driven Posi Drive Motor System (PDMS). The choice depends on your equipment and goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandy Stepper Motor (HSM):\u003c\/strong\u003e The HSM is a compact, all-in-one unit that clamps directly onto the focuser's pinion assembly. Its primary advantages are its simplicity, smaller footprint, and the signature manual override knob. It is the ideal choice for most Feather Touch focusers with standard to heavy imaging loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosi Drive Motor System (PDMS):\u003c\/strong\u003e The PDMS uses a timing belt and pulley system. It delivers higher torque for extremely heavy imaging trains and offers greater versatility for focusers that are not directly compatible with the HSM clamp. The trade-off is a slightly larger profile and a process that involves slackening the belt for manual focus.\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 use the manual focus override on the Starlight Instruments HSM?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing the manual override is immediate and requires no tools. Simply grip and turn the large override knob on the motor housing itself. This action disengages the motor's gear from the focuser's pinion shaft, allowing you to turn the focuser's coarse and fine focus knobs by hand as you normally would.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need the Focuser Boss II to use the Handy Stepper Motor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003eStarlight Instruments Handy Stepper Motor\u003c\/strong\u003e is designed as a component of a larger electronic focusing system. It requires a controller like the \u003cstrong\u003eFocuser Boss II\u003c\/strong\u003e or the Starlight Instruments EFS (Electronic Focusing System) to power the motor and interpret commands from your computer software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich HSM model do I need for my Feather Touch 3.5\" focuser on a large refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor any \u003cstrong\u003e3.5\" Feather Touch focuser\u003c\/strong\u003e, you need the \u003cstrong\u003eHSM35\u003c\/strong\u003e model. This version is engineered with the correct torque and mounting bracket to handle the larger focuser body and the heavier imaging loads typically used with large refractors and astrographs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the HSM's temperature compensation improve my astrophotography of targets like the Veil Nebula (NGC 6960)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eImaging faint, expansive targets like the Veil Nebula (NGC 6960) requires multiple long exposures over several hours. As the night air cools, your telescope's focus will drift. The \u003cstrong\u003eHSM's integrated thermistor\u003c\/strong\u003e feeds temperature data to the Focuser Boss II, which can then automatically adjust focus. This prevents stars from bloating in later subframes, ensuring every image in your final stack is as sharp as the first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main difference between the Starlight Instruments HSM and the PDMS motor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the drive mechanism. The \u003cstrong\u003eHSM (Handy Stepper Motor)\u003c\/strong\u003e is a compact, direct-drive motor that clamps onto the pinion. The \u003cstrong\u003ePDMS (Posi Drive Motor System)\u003c\/strong\u003e is a belt-drive system that offers higher torque for exceptionally heavy loads and fits some focusers that the HSM cannot. For most users with Feather Touch focusers, the HSM's simplicity and manual override are preferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I install the Handy Stepper Motor myself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, installation is straightforward for most users. It typically involves removing the existing focus knobs from your Feather Touch focuser with a small hex key, mounting the HSM unit onto the pinion assembly, and tightening it in place. Starlight Instruments provides detailed instructions for the process.\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\u003eController Compatibility\u003c\/td\u003e\n\u003ctd\u003eFocuser Boss II, Electronic Focusing System (EFS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Compatibility\u003c\/td\u003e\n\u003ctd\u003eFeather Touch Focusers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Models\u003c\/td\u003e\n\u003ctd\u003eHSM20, HSM30, HSM35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSM20 Fits\u003c\/td\u003e\n\u003ctd\u003eAny Feather Touch Micro Focuser, Feather Touch retrofit pinion assembly upgrade, and Feather Touch Crayford focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSM30 Fits\u003c\/td\u003e\n\u003ctd\u003eAny 2.5\", 3.0\", and 2.0\" Feather Touch Rack\/Pinion focuser, and Astro-Physics 2.7\" with Feather Touch pinion assembly upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSM35 Fits\u003c\/td\u003e\n\u003ctd\u003eAny 3.5\" Feather Touch focuser, and Astro-Physics 3.5\" and 4.0\" with Feather Touch pinion assembly upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_Handy_Stepper_Motor_Installation_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"HSM20","offer_id":44967288144157,"sku":"SI-HSM20","price":518.0,"currency_code":"CAD","in_stock":true},{"title":"HSM30","offer_id":44967288176925,"sku":"SI-HSM30","price":518.0,"currency_code":"CAD","in_stock":true},{"title":"HSM35","offer_id":44967288209693,"sku":"SI-HSM35","price":518.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Handy-Stepper-Motor-Manual-Focus-Over-Ride-HSM-1__99477.1596314022.1280.1280.jpg?v=1684340018"},{"product_id":"starlight-instruments-posi-drive-motor-system","title":"Starlight Instruments Posi Drive Motor System","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLifting Capacity: In excess of 56 pounds\u003c\/li\u003e\n\u003cli\u003eDrive System: Positive-engagement timing belt\u003c\/li\u003e\n\u003cli\u003eManual Override: Yes, via fine focus knob\u003c\/li\u003e\n\u003cli\u003eTemperature Sensor: Integrated for automated focus compensation\u003c\/li\u003e\n\u003cli\u003eBroad Compatibility: Fits focusers from Feather Touch, Takahashi, TEC, and more\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\u003eStarlight Instruments Posi Drive Motor System\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments Posi Drive Motor System (PDMS) is engineered for the demands of heavy, automated imaging trains, with a lifting capacity rated for in excess of 56 pounds. Designed around a high-torque stepper motor and a positive-engagement timing belt, the PDMS eliminates the risk of focuser slippage, ensuring that heavy cameras, large filter wheels, and off-axis guiders maintain perfect focus throughout an imaging session on focusers from 2.5\" to 3.5\" and larger.\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\u003e56+ Pound Lift Capacity for Automated All-Night Imaging\u003c\/h3\u003e\n\u003cp\u003eAt the core of the PDMS is a drive system that can handle imaging payloads weighing over 56 pounds without slipping or sagging. Unlike friction-based drives, the PDMS uses a timing belt that creates a direct, physical link between the motor and the focuser pinion, guaranteeing repeatable, backlash-free movement. This is critical for automated focusing routines that rely on precise, micron-level adjustments.\u003c\/p\u003e\n\u003cp\u003eFor fully autonomous operation, a thermistor is integrated directly onto the motor's circuit board. When connected to a controller like the Starlight Instruments Focuser Boss II, this sensor provides real-time temperature data, allowing your software to automatically compensate for thermal focus shift as the telescope cools overnight. This system ensures your stars remain perfectly sharp 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\u003e10:1 Manual Override: Fine Focus Control Without Motor Removal\u003c\/h3\u003e\n\u003cp\u003eThe PDMS-FTFF model for Feather Touch focusers incorporates a crucial override system that allows for manual focusing without disengaging the motor. You retain full use of the 10:1 fine focus knob, making it simple to perform an initial visual focus or make a quick manual adjustment at the scope. This seamless integration means you never have to choose between automated control and hands-on adjustment.\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\u003eCompatibility Across 9+ Brands from Takahashi to TEC\u003c\/h3\u003e\n\u003cp\u003eWhile designed to integrate perfectly with Starlight's own Feather Touch focusers, the Posi Drive Motor system is available in specific configurations for a wide range of premium telescopes and focusers. Starlight Instruments manufactures custom mounting hardware to ensure a rigid, perfect fit with no modifications required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Focusers Include:\u003c\/strong\u003e Feather Touch (2.5\", 3.0\", 3.5\"), Astro-Physics (2.7\", 4.0\"), Takahashi, Sky-Watcher Esprit, Celestron RASA 36cm, TEC, William Optics, Stellarvue, and Astro Tech.\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\u003ePDMS vs. HSM: Choosing the Right Starlight Instruments Motor\u003c\/h3\u003e\n\u003cp\u003eStarlight Instruments offers two motor options, each suited to different applications. The Handy Stepper Motor (HSM) is a compact, direct-drive motor ideal for lighter visual setups or planetary imaging. It is simpler, more compact, and provides excellent performance for less demanding payloads.\u003c\/p\u003e\n\u003cp\u003eThe Posi Drive Motor System (PDMS) is the definitive choice for serious astrophotography with heavy equipment. Its timing belt drive and 56+ pound capacity are designed specifically to prevent any possibility of slippage under heavy, off-balance loads. If your imaging train includes a large format camera, a heavy filter wheel, and an off-axis guider, the PDMS provides the strength and positional accuracy required for uncompromising automated performance.\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 controller do I need for the Starlight Instruments Posi Drive Motor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Posi Drive Motor System requires a separate controller for operation. It is designed to work with Starlight Instruments' \u003cstrong\u003eFocuser Boss II\u003c\/strong\u003e or \u003cstrong\u003eElectronic Focusing System (EFS)\u003c\/strong\u003e. These controllers provide power, computer connectivity via ASCOM, and interpret data from the motor's integrated temperature sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Posi Drive's timing belt system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe timing belt creates a positive, physical engagement with the focuser's drive shaft, much like a chain on a bicycle. This completely eliminates the possibility of slippage that can occur with friction-based or pressure-based motor drives, especially with heavy imaging loads or when the telescope is pointed near the zenith.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the manual override on the PDMS motor work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn compatible models like the PDMS-FTFF, the motor includes a built-in clutch mechanism. This allows you to turn the fine-focus knob on your Feather Touch focuser by hand to make small adjustments, without needing to loosen, disengage, or remove the motor itself. The motor's gearing simply slips until you stop turning the knob, then re-engages for electronic control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the PDMS handle my heavy imaging train on a Celestron RASA 36cm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The PDMS's lift capacity of over \u003cstrong\u003e56 pounds\u003c\/strong\u003e is specifically designed for instruments like the RASA 36cm that use large, heavy front-mounted imaging trains. The no-slip belt drive ensures the focuser position remains locked and repeatable, which is critical for maintaining collimation and focus on a fast optical system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eFor a Takahashi FSQ-106EDX4, why choose the PDMS over the HSM motor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Handy Stepper Motor (HSM) is an excellent choice for lighter setups, an FSQ-106 with a large-format cooled camera, 7-position filter wheel, and rotator can easily exceed the practical limits of a direct-drive motor. The \u003cstrong\u003ePosi Drive Motor System (PDMS)\u003c\/strong\u003e is the recommended solution here, as its 56+ pound capacity and belt drive will prevent any focuser sag or shift, preserving the perfectly flat field of the Takahashi optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the built-in thermistor on the Posi Drive Motor improve my astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe thermistor constantly measures the ambient temperature at the telescope. As the temperature drops overnight, your telescope's optical tube will contract, slightly changing the focal point. An ASCOM-compatible controller uses the data from the PDMS thermistor to make precise, periodic adjustments to the focus position, ensuring your images remain critically sharp over many hours without any manual effort.\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\u003eLifting Capacity\u003c\/td\u003e\n\u003ctd\u003eIn excess of 56 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive Mechanism\u003c\/td\u003e\n\u003ctd\u003eTiming Belt (Posi Drive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Sensor\u003c\/td\u003e\n\u003ctd\u003eIntegrated Thermistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Override\u003c\/td\u003e\n\u003ctd\u003eYes, via fine focus knob (on compatible models)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Focuser Sizes\u003c\/td\u003e\n\u003ctd\u003e2.5\", 3.0\", true 3\", 3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Mounting Options\u003c\/td\u003e\n\u003ctd\u003eFeather Touch 2.5\"\/3.0\", Astro-Physics 2.7\", Feather Touch 3.5\", Astro-Physics 4.0\", Astro Tech, Celestron RASA 36cm, Sky-Watcher Esprit, Stellarvue Stock Focuser, Takahashi Stock Focuser, TEC Designed Focuser, William Optics\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\"\u003eNote\u003c\/p\u003e\n      \u003cp class=\"DAV-item-subtitle\"\u003eBox contents vary by selected focuser compatibility option. A controller and power supply are sold separately.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_PDMS-FTF_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"Feather Touch 2.5\"\/3.0\" and Astro-Physics 2.7\"","offer_id":44967288897821,"sku":"SI-PDMS-FTFF-2.5","price":826.0,"currency_code":"CAD","in_stock":true},{"title":"Feather Touch 3.5\" and Astro-Physics 4.0\"","offer_id":44967288930589,"sku":"SI-PDMS-FTFF-3.5","price":826.0,"currency_code":"CAD","in_stock":true},{"title":"Astro Tech","offer_id":44967288963357,"sku":"SI-PDMS-AT","price":875.0,"currency_code":"CAD","in_stock":true},{"title":"Celestron RASA 36cm","offer_id":44967288996125,"sku":"SI-PDMS-RASA36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"Sky-Watcher Esprit","offer_id":44967289028893,"sku":"SI-PDMS-SW","price":833.0,"currency_code":"CAD","in_stock":true},{"title":"Stellarvue Stock Focuser","offer_id":44967289061661,"sku":"SI-PDMS-SV","price":833.0,"currency_code":"CAD","in_stock":true},{"title":"Takahashi Stock Focuser","offer_id":44967289094429,"sku":"SI-PDMS-TAK","price":833.0,"currency_code":"CAD","in_stock":true},{"title":"TEC Designed Focuser","offer_id":44967289127197,"sku":"SI-PDMS-TEC","price":875.0,"currency_code":"CAD","in_stock":true},{"title":"William Optics","offer_id":44967289159965,"sku":"SI-PDMS-WO","price":875.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight-Instruments-Posi-Drive-Motor-System-SI-PDMS-1__08069.1596314024.1280.1280.jpg?v=1684339739"},{"product_id":"starlight-instruments-feather-touch-gen-ii-3-0-motorized-r-p-focuser","title":"Starlight Instruments Feather Touch Gen II 3.0\" Motorized R\u0026P Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLifts imaging trains up to 56 lb with zero slip\u003c\/li\u003e\n\u003cli\u003eAchieves 0.23 micron resolution per step for critical focus\u003c\/li\u003e\n\u003cli\u003eIntegrated Posi Drive Motor System (PDMS) with ASCOM compatibility\u003c\/li\u003e\n\u003cli\u003e10:1 dual-speed manual focus knobs for initial setup\u003c\/li\u003e\n\u003cli\u003eThree-point draw tube support system prevents tilt and image shift\u003c\/li\u003e\n\u003cli\u003eFull 360-degree rotation for precise camera framing\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\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\u003eStarlight Instruments Feather Touch Gen II 3.0\" Motorized R\u0026amp;P Focuser\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments Feather Touch Gen II 3.0\" Motorized Focuser is engineered from the ground up for automated astrophotography, supporting a massive 56 lb payload with a repeatable step resolution of just 0.23 microns. Its helical rack and pinion drive, combined with an integrated Posi Drive Motor System, delivers extremely low backlash, while the 10:1 dual-speed knobs provide precise manual control when needed. A three-point draw tube support system and full 360-degree rotation ensure your imaging train remains perfectly orthogonal to the optical axis, regardless of orientation.\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\u003eA 56 lb Payload Capacity for Heavy Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eDesigned for the most demanding imaging setups, the Gen II focuser uses a robust helical rack and pinion drive mechanism capable of lifting and holding a 56 lb payload without flexure or slippage. The hardened stainless steel and anodized aluminum construction ensures long-term stability, even when loaded with large format cameras, heavy filter wheels, and off-axis guiders. This immense capacity eliminates a primary source of imaging artifacts, allowing your autofocus routine to perform reliably 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\u003e0.23 Micron Resolution for Automated Focusing\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Gen II is the integrated Posi Drive Motor System (PDMS), which achieves a repeatable focus position down to 0.23 microns per step. This level of precision is critical for reaching sharp focus with fast optical systems where the critical focus zone is exceptionally narrow. With its extremely low backlash and native ASCOM and TheSkyX compatibility, the focuser executes autofocus curves with accuracy, ensuring your data is consistently sharp from frame to frame. Note that an external controller, like the Starlight Instruments EFS or Focuser Boss II, is required for operation.\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\u003e3-Point Support and a Threaded Drawtube\u003c\/h3\u003e\n\u003cp\u003eThe Gen II incorporates several features specifically for imagers to maintain a rigid, square optical train. A three-point draw tube support system actively prevents tilt as the focuser moves, a common issue with heavy cantilevered loads. The drawtube itself is threaded, providing a direct, secure connection for cameras, field flatteners, and reducers, eliminating the potential for sag inherent in compression ring systems. For framing, the entire focuser body rotates a full 360 degrees within its tube adapter, and a laser-etched millimeter scale allows for repeatable manual 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\u003eFeather Touch Gen II vs. Standard 3.0\" Focuser: An Imager's Upgrade\u003c\/h3\u003e\n\u003cp\u003eWhile a standard Feather Touch focuser with a bolt-on motor is a formidable tool, the Gen II is a purpose-built system for automation. The key difference lies in the integration and engineering choices made specifically for robotic imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Motor:\u003c\/strong\u003e The Posi Drive motor is integral to the Gen II's design, not an add-on. This results in lower backlash and higher positional accuracy than a retrofitted system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-Point Support:\u003c\/strong\u003e The Gen II's three-point drawtube support is a significant mechanical upgrade over standard designs, built to counteract the specific tilt-inducing forces of heavy, off-axis imaging trains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded Drawtube:\u003c\/strong\u003e While standard focusers use compression rings, the Gen II's threaded drawtube is the professional standard for creating a rigid, non-flexing imaging column.\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\"\u003eWhat controller do I need for the Feather Touch Gen II focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Feather Touch Gen II focuser requires an external electronic controller, which is sold separately. You will need either the \u003cstrong\u003eStarlight Instruments EFS (Electronic Focusing System)\u003c\/strong\u003e or the \u003cstrong\u003eFocuser Boss II\u003c\/strong\u003e control hub to power and operate the integrated Posi Drive motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 0.23 micron step size on the Gen II focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e0.23 micron\u003c\/strong\u003e step size provides extremely fine control over the focus point. This is especially critical for fast telescopes (f\/5 or lower) where the zone of sharp focus is very shallow. Such fine resolution allows autofocus software to consistently nail focus to a degree that is impossible to achieve manually, resulting in sharper stars and more detailed images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 56 lb lifting capacity of the Feather Touch Gen II benefit my imaging rig with a large refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA heavy imaging train on a large refractor—consisting of a large-format cooled CMOS or CCD camera, a 7-position filter wheel, an off-axis guider, and corrective optics—can easily exceed 15-20 lbs. The \u003cstrong\u003e56 lb capacity\u003c\/strong\u003e of the Gen II provides a massive safety margin, ensuring the focuser never slips or droops, even when the telescope is pointed near the zenith. This prevents focus shift and tilt, which are common sources of elongated stars at the edge of the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I still focus the Feather Touch Gen II manually?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Feather Touch Gen II retains the signature manual \u003cstrong\u003e10:1 dual-speed focus knobs\u003c\/strong\u003e. This allows you to make coarse adjustments quickly for initial setup or eyepiece use, and then use the fine-focus knob for precise manual adjustments before turning control over to your autofocus software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between the Feather Touch Gen II and a standard Feather Touch with an add-on motor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is that the Gen II is an \u003cstrong\u003eintegrated system\u003c\/strong\u003e designed for robotic imaging. Key advantages of the Gen II include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-point drawtube support\u003c\/strong\u003e to prevent tilt under heavy loads.\u003c\/li\u003e\n\u003cli\u003eA \u003cstrong\u003ethreaded drawtube\u003c\/strong\u003e for a more secure, flex-free connection to your camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely low backlash\u003c\/strong\u003e from the factory-integrated Posi Drive motor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA standard focuser with an add-on motor is excellent, but the Gen II is engineered specifically to eliminate the subtle mechanical issues that can affect advanced, automated imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the Feather Touch Gen II to my specific telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo mount the focuser, you will need a telescope-specific \u003cstrong\u003etube adapter ring\u003c\/strong\u003e. Starlight Instruments makes a wide variety of adapters for most commercial telescopes, including refractors, Ritchey-Chrétiens, and SCTs. You will also need to select the appropriate \u003cstrong\u003eend cap\u003c\/strong\u003e to connect your camera or accessories to the focuser's drawtube.\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\u003eLifting Capacity\u003c\/td\u003e\n\u003ctd\u003e56 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.23 micron per step\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDraw Tube Drive\u003c\/td\u003e\n\u003ctd\u003eHelical rack and pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDraw Tube Support\u003c\/td\u003e\n\u003ctd\u003eThree-point draw tube support system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDraw Tube Interface\u003c\/td\u003e\n\u003ctd\u003eThreaded, for camera, spacers and corrective optics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklash\u003c\/td\u003e\n\u003ctd\u003eExtremely low, for automated focusing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Drive Compatibility\u003c\/td\u003e\n\u003ctd\u003eASCOM; direct support in TheSkyX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e10:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Focus Knobs\u003c\/td\u003e\n\u003ctd\u003eDual speed coarse\/fine, anodized aluminum fine focus knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotation\u003c\/td\u003e\n\u003ctd\u003e360 degrees, PTFE-lined tube adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDraw Tube Scale\u003c\/td\u003e\n\u003ctd\u003eMillimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope Mounting\u003c\/td\u003e\n\u003ctd\u003eTwo sets of #8-32 UNC threaded holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Cap Collimation\u003c\/td\u003e\n\u003ctd\u003e3 set screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eHardened stainless steel, steel and anodized aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Baffling\u003c\/td\u003e\n\u003ctd\u003eGlare-resistant black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSet Screws\u003c\/td\u003e\n\u003ctd\u003eTipped stainless steel, gentle on eyepieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA (designed, machined and assembled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Draw Tube Travel\u003c\/td\u003e\n\u003ctd\u003e1.5\", 3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_2.5in_3.0in_and_True_3.0in_Feather_Touch_Focuser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"1.5\" Travel","offer_id":44967294992669,"sku":"SI-FTF3015B-A GEN II-PDMS","price":1743.0,"currency_code":"CAD","in_stock":true},{"title":"3.5\" Travel","offer_id":44967295025437,"sku":"SI-FTF3035B-A-GEN II-PDMS","price":1785.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Feather-Touch-3-0-inch-Diameter-Dual-Speed-Focuser-1-5-inch-Draw-Tube-Travel-and-Brake-FTF3015B-AGENII-PDMS-1__66242.1596314034.1280.1280.jpg?v=1684339778"},{"product_id":"starlight-instruments-focus-motor-for-redcat-spacecat","title":"Starlight Instruments Focus Motor for RedCat\/SpaceCat","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds electronic focus control to William Optics RedCat\/SpaceCat telescopes\u003c\/li\u003e\n\u003cli\u003eBased on the proven Starlight Instruments Handy Stepper Motor (HSM)\u003c\/li\u003e\n\u003cli\u003eEnables automated, repeatable focusing for astrophotography\u003c\/li\u003e\n\u003cli\u003eRequires a Starlight Instruments EFS or Focuser Boss II controller\u003c\/li\u003e\n\u003cli\u003eEliminates focus shift from manual helical focuser adjustments\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\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\u003eStarlight Instruments Focus Motor for RedCat\/SpaceCat\u003c\/h2\u003e\n\u003cp\u003eThe Starlight Instruments SI-RCEF Focus Motor brings automated, high-precision focusing to the helical focuser of the William Optics RedCat and SpaceCat 51mm astrographs. By motorizing the manual focuser, this system allows you to achieve critical focus using software control, eliminating image shift and enabling advanced automated imaging routines that are impossible with manual adjustment alone.\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 Focusing for the RedCat\/SpaceCat 51mm\u003c\/h3\u003e\n\u003cp\u003eThe William Optics RedCat 51mm is a premier wide-field imaging instrument, but its manual helical focuser can be challenging for achieving the perfect, repeatable focus required for serious astrophotography. This Starlight Instruments motor drive replaces manual guesswork with robotic precision, making it an essential upgrade for imagers.\u003c\/p\u003e\n\u003cp\u003eBased on a modified version of the reliable Handy Stepper Motor (HSM), the SI-RCEF provides the fine, backlash-free adjustments necessary to nail focus across temperature changes and between filter swaps. This allows your imaging software to run autofocus V-curves, ensuring your stars remain perfectly sharp throughout the entire 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\u003eA Dedicated Starlight Instruments Ecosystem\u003c\/h3\u003e\n\u003cp\u003eThis focus motor is designed to integrate seamlessly into the Starlight Instruments control ecosystem. A key trade-off for its precision is that it cannot be operated as a standalone device; it requires either the Starlight Instruments Electronic Focusing System (SI-EFS) or the Focuser Boss II controller to function.\u003c\/p\u003e\n\u003cp\u003eThis requirement ensures that the motor operates with the sophisticated backlash compensation, temperature compensation, and ASCOM-compliant software control that Starlight Instruments is known for. By connecting to a dedicated controller, you gain access to a robust platform for managing your entire imaging workflow.\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\u003eChoosing Your Controller: EFS vs. Focuser Boss II\u003c\/h3\u003e\n\u003cp\u003eThe choice between the EFS and Focuser Boss II depends on the scale of your imaging setup. Both provide flawless control for the RedCat motor, but serve different needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic Focusing System (EFS):\u003c\/strong\u003e This is the ideal choice for a streamlined, single-focuser setup. The compact control box and simple hand controller are perfect for portable rigs where the RedCat is the primary instrument. It provides full ASCOM compatibility for computer control in a minimalist package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocuser Boss II:\u003c\/strong\u003e If your RedCat is part of a larger observatory setup or you plan to control multiple focusers (e.g., a main scope and a guidescope), the Focuser Boss II is the superior hub. It offers Ethernet and optional WiFi connectivity, can control a second focuser, and features a built-in web server for control from any device.\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\"\u003eWhat is the purpose of the Starlight Instruments Focus Motor for the RedCat?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts purpose is to replace manual focusing on the William Optics RedCat\/SpaceCat 51mm telescopes with \u003cstrong\u003eprecise, repeatable electronic focus control\u003c\/strong\u003e. This is critical for astrophotography, as it allows autofocusing software to maintain perfect focus as temperatures change overnight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich controller do I need for the RedCat Focus Motor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must use a Starlight Instruments controller. You have two options: the \u003cstrong\u003eStarlight Instruments Electronic Focusing System (SI-EFS)\u003c\/strong\u003e for single-focuser setups, or the more advanced \u003cstrong\u003eFocuser Boss II\u003c\/strong\u003e, which can control multiple devices and offers network connectivity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this motor work with other helical focusers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the SI-RCEF motor assembly is specifically designed and machined to fit the helical focuser of the \u003cstrong\u003eWilliam Optics RedCat 51mm and SpaceCat 51mm\u003c\/strong\u003e telescopes only. It is not a universal motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the RedCat Focus Motor improve imaging of faint targets like the California Nebula (NGC 1499)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor long-exposure projects like NGC 1499, temperature drops can cause focus to drift, softening your images. With this motor and an autofocus routine in software like NINA or SGP, your system can automatically run a focus check every hour or after a filter change, ensuring every sub-exposure is perfectly sharp and maximizing the detail you capture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I still focus my RedCat 51mm manually with the motor installed?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Starlight Instruments Handy Stepper Motor (HSM) family, on which this motor is based, typically includes a manual override feature. By rotating the motor housing, you can disengage the gears for manual adjustment. This is useful for initial setup or visual use without powering on the controller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs installing the Starlight Instruments Focus Motor on my RedCat difficult?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward for users comfortable with basic tools. The motor assembly is designed to clamp securely onto the telescope's helical focuser mechanism. Starlight Instruments provides detailed instructions to guide you through the process.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starlight_Instruments_Handy_Stepper_Motor_Installation_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.starlightinstruments.com\/installation-instructions\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starlight-instruments-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarlight Instruments 1-Year Warranty on Electronics\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starlight Instruments","offers":[{"title":"Default Title","offer_id":44967298924829,"sku":"SI-RCEF","price":371.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-SI-RCEF-SI-RCEF-1__56282.1596314053.1280.1280.png?v=1684339923"}],"url":"https:\/\/davidastro.com\/collections\/starlight-instruments-electronic-focusers.oembed","provider":"David Astro","version":"1.0","type":"link"}