{"product_id":"baader-planetarium-s58-to-m68a-adapter","title":"Baader Planetarium S58 to M68a Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts S58-long threads to the M68a standard\u003c\/li\u003e\n\u003cli\u003eLow-profile \"short\" design minimizes back focus consumption\u003c\/li\u003e\n\u003cli\u003eEngineered for the Baader BACHES Echelle-spectrograph\u003c\/li\u003e\n\u003cli\u003eEnables use of specific 2-inch mirror and prism diagonals\u003c\/li\u003e\n\u003cli\u003eProvides a rigid, secure mechanical connection\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\u003eBaader Planetarium S58 to M68a Adapter\u003c\/h2\u003e\n\u003cp\u003eThe Baader Planetarium Adapter S58-long to M68a (short) creates a critical, low-profile connection between components using the S58 thread and the widely adopted M68 system. Specifically designed for use with the Baader BACHES Echelle-spectrograph and select 2\" mirror or prism diagonals, this adapter ensures a secure, light-tight fit while minimizing the consumption of precious back focus in a complex optical train.\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 Low-Profile S58 to M68a Connection\u003c\/h3\u003e\n\u003cp\u003eThis adapter solves the specific mechanical challenge of integrating specialized S58-threaded accessories into an optical train built around the robust M68 standard. It allows you to attach instruments like the BACHES spectrograph to M68-threaded focusers or accessories, maintaining system rigidity and alignment.\u003c\/p\u003e\n\u003cp\u003eThe \"short\" designation is key; the adapter is engineered to add minimal length to the optical path. This is crucial for imagers and spectroscopists who are often working within tight back focus tolerances, especially when using reducers, flatteners, or other optical correctors.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBACHES Spectrograph Integration:\u003c\/strong\u003e Provides the necessary thread conversion to attach the BACHES spectrograph directly to an M68-threaded focuser or accessory train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Diagonal Compatibility:\u003c\/strong\u003e Allows the use of specific 2\" diagonals that feature an S58 input thread with M68-threaded telescope visual backs or focusers.\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 primary purpose of the Adapter S58-long to M68a (short)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary purpose is to connect Baader accessories with an S58 thread, such as the \u003cstrong\u003eBACHES spectrograph\u003c\/strong\u003e or certain \u003cstrong\u003e2\" diagonals\u003c\/strong\u003e, to a telescope or focuser that uses the M68 thread system. Its \"short\" design minimizes the optical path length consumed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Adapter S58-long to M68a (short) work with any S58 accessory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is specifically designed to adapt from the \u003cstrong\u003eS58-long\u003c\/strong\u003e thread standard. While it may be physically compatible with other S58 accessories, it is optimized for use with the Baader BACHES spectrograph and select Baader 2\" mirror\/prism diagonals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Baader BACHES spectrograph and want to connect it to my focuser with an M68 output. Is the Adapter S58-long to M68a (short) the correct part?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is the intended application. The adapter converts the S58 thread on the BACHES spectrograph to the M68 thread on your focuser, providing a secure and rigid connection for spectroscopy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a \"short\" adapter like the Adapter S58-long to M68a (short) important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \"short\" or low-profile adapter is crucial for \u003cstrong\u003emaintaining back focus\u003c\/strong\u003e. Many imaging systems with reducers or flatteners have very strict spacing requirements, and this adapter uses as little of that available distance as possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do \"S58\" and \"M68\" refer to on the Adapter S58-long to M68a (short)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eS58 and M68 are thread standards. \u003cstrong\u003eM68 (specifically M68x1)\u003c\/strong\u003e is a common large-format thread used on high-end focusers and accessories for its rigidity. \u003cstrong\u003eS58\u003c\/strong\u003e is a specific thread used by Baader Planetarium on certain instruments like the BACHES spectrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Adapter S58-long to M68a (short) to attach a camera with M68 threads to a Baader 2\" diagonal with an S58 thread?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, if your Baader 2\" diagonal has the female S58 thread, this adapter will provide the male M68 thread needed to start building a camera train. You will still need to ensure you have the correct additional spacers to reach the proper back focus for your camera sensor.\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\u003e0.02\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\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\/Baader_Planetarium_BACHES_Spectrograph_ATT_2016_Presentation.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\"\u003eBaader Planetarium BACHES Spectrograph ATT 2016 Presentation\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\/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":52913176215837,"sku":"BAA-2458632","price":76.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Adapter-S58-long-to-M68a-short-1_5675a534-e363-4c54-90c4-ee04c10b6840.jpg?v=1789087241","url":"https:\/\/davidastro.com\/products\/baader-planetarium-s58-to-m68a-adapter","provider":"David Astro","version":"1.0","type":"link"}