{"product_id":"primalucelab-pl3600367","title":"PrimaLuceLab Adapter ESATTO 3.5\" LP for GSO\/Orion\/TPO Ritchey-Chretien 10, 12, 14 and 16 inches","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects ESATTO 3.5\" LP Focuser to Large RC Telescopes\u003c\/li\u003e\n\u003cli\u003eTelescope-Side Thread: M117x1 Female\u003c\/li\u003e\n\u003cli\u003eCompatible with 10\", 12\", 14\", and 16\" GSO\/Orion\/TPO Ritchey-Chretien Models\u003c\/li\u003e\n\u003cli\u003eUltra-Low Profile Design to Maximize Available Back Focus\u003c\/li\u003e\n\u003cli\u003eProvides a Secure, Rigid Connection for Astrophotography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAdapter ESATTO 3.5\" LP for GSO\/Orion\/TPO Ritchey-Chretien 10, 12, 14 and 16 inches\u003c\/h2\u003e\n\u003cp\u003eThe PrimaLuceLab Adapter for ESATTO 3.5\" LP provides the essential M117 threaded connection for large GSO, Orion, and TPO Ritchey-Chretien telescopes, including 10\", 12\", 14\", and 16\" models, while its minimal optical thickness preserves critical back focus for astrophotography.\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\u003eM117 Connection for 10\" to 16\" GSO\/Orion\/TPO RC Telescopes\u003c\/h3\u003e\n\u003cp\u003eThis adapter creates a direct, rigid connection between the PrimaLuceLab ESATTO 3.5\" LP robotic focuser and the M117x1 rear cell thread found on large-aperture Ritchey-Chretien telescopes from GSO, Orion, and TPO. It is designed for the 10-inch, 12-inch, 14-inch, and 16-inch models, supporting both aluminum and carbon fiber tube versions.\u003c\/p\u003e\n\u003cp\u003eBy replacing the stock focuser assembly, this adapter allows you to upgrade your instrument with the precision and heavy-load capacity of the ESATTO system, enabling repeatable, automated focusing for serious imaging applications.\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\u003eESATTO 3.5\" LP Integration: A Minimal-Thickness Solution\u003c\/h3\u003e\n\u003cp\u003eThe primary engineering goal of this adapter is to consume the absolute minimum amount of back focus. For astrophotographers using Ritchey-Chretien telescopes, every millimeter of optical path is critical for accommodating accessories like off-axis guiders, filter wheels, and rotators.\u003c\/p\u003e\n\u003cp\u003eIts ultra-low profile design ensures that the ESATTO 3.5\" LP focuser is mounted as close to the telescope's rear cell as possible, maximizing the available space for your imaging train. While this adapter solves the mounting challenge, note that you may still need appropriate extension tubes to place your specific camera sensor at the telescope's focal plane.\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 Adapter for ESATTO 3.5\" LP for GSO RC telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter allows you to securely mount a PrimaLuceLab \u003cstrong\u003eESATTO 3.5\" LP robotic focuser\u003c\/strong\u003e onto the rear cell of large GSO, Orion, or TPO Ritchey-Chretien telescopes. It provides the correct \u003cstrong\u003eM117 thread\u003c\/strong\u003e and has a very low profile to save as much back focus as possible for your camera and accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich specific telescopes is this ESATTO 3.5\" LP adapter compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed specifically for GSO, Orion, and TPO Ritchey-Chretien telescopes with an M117x1 rear thread. This includes the following aperture sizes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e10-inch (254mm)\u003c\/li\u003e\n\u003cli\u003e12-inch (304mm)\u003c\/li\u003e\n\u003cli\u003e14-inch (355mm)\u003c\/li\u003e\n\u003cli\u003e16-inch (406mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this ESATTO 3.5\" LP adapter help with my astrophotography setup on a 12\" RC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn a 12\" RC, back focus is limited. This adapter's minimal thickness is crucial when building an imaging train that includes an \u003cstrong\u003eoff-axis guider (OAG), a filter wheel, and your camera\u003c\/strong\u003e. It allows you to install the high-precision ESATTO 3.5\" LP focuser without consuming the space needed for those essential accessories, which is a common challenge with stock focusers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need extension tubes with the ESATTO 3.5\" LP adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's possible. This adapter is designed to maximize the \u003cstrong\u003eavailable\u003c\/strong\u003e back focus by mounting the focuser close to the tube. However, depending on your specific camera's sensor-to-flange distance and other accessories, you will likely need to add the correct combination of extension tubes to position your camera sensor precisely at the telescope's focal point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging the galaxy pair M81 and M82 with my 16\" TPO RC; why is this low-profile ESATTO 3.5\" LP adapter essential?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor imaging deep-sky targets like the M81\/M82 group with a long focal length 16\" RC, precise, repeatable focusing is non-negotiable for sharp details. The ESATTO 3.5\" LP provides this robotic precision. This low-profile adapter is the essential component that lets you install the focuser on your telescope's M117 thread without giving up the back focus required for your guide camera and filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat thread does this PrimaLuceLab adapter use to connect to the Ritchey-Chretien telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter features a female \u003cstrong\u003eM117x1 thread\u003c\/strong\u003e on the telescope side, which is the standard rear cell thread for the compatible GSO, Orion, and TPO Ritchey-Chretien models from 10\" to 16\" aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/primalucelab-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePrimaLuceLab 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PrimaLuceLab","offers":[{"title":"Default Title","offer_id":52913381048605,"sku":"PLL-PL3600367","price":175.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PrimaLuceLab-Adapter-ESATTO-3-5-LP-for-GSO-Orion-TPO-Ritchey-Chretien-10-12-14-and-16-inches-1_2e050c84-0bac-48f3-b722-96555a0075a4.jpg?v=1789090134","url":"https:\/\/davidastro.com\/products\/primalucelab-pl3600367","provider":"David Astro","version":"1.0","type":"link"}