{"product_id":"baader-planetarium-imp85-adapter-s120a-to-ir90-focuser-short-20mm","title":"Baader Planetarium IMP85 Adapter S120a to IR90 Focuser Short (20mm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts the IMP85 instrument selector to telescopes with an IR90 focuser\u003c\/li\u003e\n\u003cli\u003eProvides a short, rigid connection with a 20mm optical path length\u003c\/li\u003e\n\u003cli\u003eEnables a permanent 3-port instrument setup on a single telescope\u003c\/li\u003e\n\u003cli\u003eMaintains a direct, non-mirrored optical path for the primary instrument on Port 1\u003c\/li\u003e\n\u003cli\u003eFacilitates automated switching for remote observatories and multi-purpose rigs\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\u003eIMP85 Adapter S120a to IR90 Focuser Short (20mm)\u003c\/h2\u003e\n\u003cp\u003eThis IMP85 Adapter connects the S120a interface of the IMP85 instrument selector to a telescope's IR90 focuser, creating a solid connection with a minimal 20mm optical path length. The IMP85 system is designed for permanent multi-instrument setups, allowing you to switch between 3 different optical trains electronically. With this adapter, you can integrate the IMP85's straight-through Port 1 for a primary deep-sky camera, while keeping Ports 2 and 3 ready for a spectrograph or planetary camera.\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 IMP85 System: 3 Ports, 1 Straight-Through Optical Path\u003c\/h3\u003e\n\u003cp\u003eDeveloped for remote observatory automation, the IMP85 instrument selector eliminates the need for manual equipment changes. This adapter allows you to integrate that system with your IR90 focuser. The core design provides a central, un-mirrored Port 1, ensuring your main astro camera receives 100% of the light from the telescope's optical axis without any degradation from a flip-mirror.\u003c\/p\u003e\n\u003cp\u003eThis is critical for remote observatories that can't be physically reconfigured, or for public observatories that need to switch from an imaging camera to a visual eyepiece for guests in seconds. Once installed, your telescope can be used for deep-sky imaging, planetary video, and spectroscopy without ever detaching a camera.\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\u003eElectronically Switched Optics: Two 40x40mm Fused Silica Mirrors\u003c\/h3\u003e\n\u003cp\u003eTo access Ports 2 and 3, the IMP85 electronically inserts one of two 40x40mm fused silica mirrors into the light path. These high-quality mirrors redirect the telescope's focus to a secondary or tertiary instrument with exceptional repeatability. This means you can confidently switch between instruments knowing that focus and alignment remain consistent.\u003c\/p\u003e\n\u003cp\u003eThe ports are designed with a clearly defined backfocus, allowing you to use standard adapters to make your various instruments parfocal. This minimizes refocusing time when switching between your main camera and your guide camera, spectrograph, or video camera.\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\u003eIR90 Focuser Adaptation: A Compact 20mm Connection\u003c\/h3\u003e\n\u003cp\u003eThis specific component, the S120a to IR90 adapter, is the mechanical link between your telescope and the powerful IMP85 system. It is engineered to provide a secure, non-flexing connection to focusers using the IR90 standard. With an optical path length of just 20mm, it helps conserve precious backfocus, which is often critical when building complex imaging trains with multiple components.\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 primary purpose of the IMP85 adapter for the IR90 Focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter's sole purpose is to mechanically connect the \u003cstrong\u003eIMP85 instrument selector\u003c\/strong\u003e to a telescope focuser that uses the \u003cstrong\u003eIR90 connection standard\u003c\/strong\u003e. It provides a secure, short (20mm) connection, enabling the use of the IMP85's multi-port capabilities on compatible telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the IMP85 system, used with this IR90 adapter, benefit a remote observatory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a remote observatory, the IMP85 eliminates manual intervention. An operator can remotely switch between a deep-sky camera on Port 1, a planetary camera on Port 2, and a spectrograph on Port 3 without needing on-site staff. This dramatically increases the telescope's operational efficiency and the variety of scientific or imaging projects that can be conducted in a single night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the main camera on Port 1 of the IMP85 lose any light from mirrors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. A key design feature of the IMP85 is that \u003cstrong\u003ePort 1 is a straight-through optical path\u003c\/strong\u003e. It does not use any mirrors. Your primary camera is placed directly on the optical axis, receiving the full, unobstructed light cone from the telescope for maximum signal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of instruments can I connect to Ports 2 and 3 of the IMP85?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePorts 2 and 3 are ideal for secondary instruments. Common configurations include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA high-frame-rate planetary or guide camera\u003c\/li\u003e\n\u003cli\u003eA spectrograph for scientific analysis\u003c\/li\u003e\n\u003cli\u003eA video camera for broadcast or outreach\u003c\/li\u003e\n\u003cli\u003eA simple eyepiece for visual confirmation or public viewing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 20mm IMP85 adapter all I need to connect to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is one component of a modular system. You need the \u003cstrong\u003eIMP85 instrument selector main body\u003c\/strong\u003e itself. This adapter is specifically for telescopes with an \u003cstrong\u003eIR90 focuser\u003c\/strong\u003e. You will also need separate camera-side adapters to connect your specific cameras, spectrographs, or eyepieces to the three ports of the IMP85.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the IMP85 help with public outreach at an observatory with an IR90 focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt allows an observatory to leave an imaging camera permanently attached for astrophotography (on Port 1) while having an eyepiece ready for guests on Port 2 or 3. With the press of a button, the view can be diverted to the eyepiece for a tour group. After they leave, the system can be switched back to the camera instantly, with no time wasted on re-collimating or re-attaching equipment.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium, Planewave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003eD85i\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003eD120a\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Adapter\u003c\/td\u003e\n\u003ctd\u003eReducing Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e40.9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eS120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003e120 x 7.5mm dovtail\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913126080797,"sku":"BAA-2451316","price":212.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-IMP85-Adapter-S120a-to-IR90-Focuser-Short-20mm-1_24bf9697-de46-48c6-b6f7-fdb5fb90457a.jpg?v=1789086496","url":"https:\/\/davidastro.com\/fr-us\/products\/baader-planetarium-imp85-adapter-s120a-to-ir90-focuser-short-20mm","provider":"David Astro","version":"1.0","type":"link"}