{"title":"Spectrograph Adapters","description":null,"products":[{"product_id":"shelyak-spacer-for-star-analyser","title":"Entretoise Shelyak pour analyseur d'étoiles","description":"\u003c!-- more --\u003e \u003cp\u003e\u003cspan\u003eLa distance minimale recommandée (en mm entre le capteur et l'extrémité du nez où se visse le Star Analyzer 100) est de 4x la taille des pixels de la caméra en microns. Si vous trouvez que la distance pour votre configuration est inférieure à la valeur minimale, nous vous recommandons d'acheter suffisamment d'entretoises pour amener la distance au-dessus du minimum.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e Chaque entretoise ajoute un réglage de 7 à 10 mm.\u003c\/p\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968071037213,"sku":"SHK-BA0014","price":47.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/BA0014-Spacer-T201x150_13__54747.1671743305.1280.1280.png?v=1684348656"},{"product_id":"shelyak-ba0001","title":"Shelyak Lhires III 2-inch adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts Lhires III Spectroscope to 2-inch focusers\u003c\/li\u003e\n\u003cli\u003eProvides a secure, non-flexing connection\u003c\/li\u003e\n\u003cli\u003eEnables use with a wider range of telescopes\u003c\/li\u003e\n\u003cli\u003eMachined for precise optical alignment\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eLhires III 2-inch adapter\u003c\/h2\u003e\n      \u003cp\u003eThe Lhires III 2-inch adapter provides a robust and secure mechanical link between your Shelyak Lhires III spectroscope and any standard 2-inch telescope focuser. This simple but essential component ensures precise optical alignment and rigidity, preventing flexure that can compromise spectroscopic data. It allows you to mount your Lhires III on larger telescopes that are typically equipped with 2-inch focusers, expanding your instrument's compatibility.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSecure Mounting for the Lhires III in 2-inch Focusers\u003c\/h3\u003e\n      \u003cp\u003eThis adapter is the standard solution for connecting the Lhires III spectroscope, which typically uses smaller threaded connections, to the larger 2-inch format common on Schmidt-Cassegrains, Ritchey-Chrétiens, and larger refractors. By converting the input of the spectroscope to a simple 2-inch barrel, you gain a solid, stable platform for your scientific work, ensuring the entire optical train remains perfectly collimated through long exposures.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Lhires III 2-inch adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter allows you to mount your \u003cstrong\u003eShelyak Lhires III spectroscope\u003c\/strong\u003e into a standard \u003cstrong\u003e2-inch telescope focuser\u003c\/strong\u003e. It provides a secure, rigid connection, ensuring correct optical alignment for accurate data acquisition.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this adapter for my Lhires III?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need this adapter if your telescope has a 2-inch focuser and you do not have another way to adapt the Lhires III's native mounting thread to it. It is the most direct and stable method for using the spectroscope with larger amateur telescopes.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Lhires III 2-inch adapter attach?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter threads directly onto the input side of the Lhires III spectroscope body. The other end is a smooth 2-inch barrel that slides into your telescope's focuser and is secured by the focuser's compression ring or set screws, just like a standard 2-inch eyepiece.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943026290973,"sku":"SHK-BA0001","price":131.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Lhires-III-2-inch-adapter-1_ab4109a8-edcb-4498-9cab-1b087d5b3f84.jpg?v=1789615786"},{"product_id":"shelyak-ba0023","title":"Shelyak Adapter Ring for Canon EOS to T-Mount (M42x0.75)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts Canon EOS (EF\/EF-S) camera bodies to the standard T-mount\u003c\/li\u003e\n\u003cli\u003eProvides female M42x0.75 T-threads for secure connections\u003c\/li\u003e\n\u003cli\u003eEnables prime-focus astrophotography through a telescope\u003c\/li\u003e\n\u003cli\u003eEssential for connecting to T-threaded flatteners, reducers, and filter wheels\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\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eAdapter Ring for Canon EOS to T-Mount (M42x0.75)\u003c\/h2\u003e\n      \u003cp\u003eThis adapter ring is the fundamental link for attaching a Canon EOS camera body to virtually any telescope for prime-focus astrophotography, providing a solid connection via the universal M42x0.75 T-thread standard. By replacing your camera's lens, this adapter converts the camera's bayonet mount into a female M42x0.75 threaded interface, allowing direct coupling to your imaging train.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eConnect Canon EOS Cameras to M42x0.75 T-Thread Accessories\u003c\/h3\u003e\n      \u003cp\u003eThe M42x0.75 thread, commonly known as the T-thread or T-mount, is the industry standard for astronomical accessories. This adapter allows you to securely attach your Canon DSLR or mirrorless camera body to a telescope's focuser (using a separate T-to-1.25\" or T-to-2\" nosepiece), a field flattener, a coma corrector, an off-axis guider, or a filter wheel.\u003c\/p\u003e\n      \u003cp\u003eThis direct, threaded connection is far more secure than eyepiece projection methods, eliminating flexure and ensuring the camera sensor remains perfectly parallel to the focal plane. It is the essential first piece required to begin imaging the night sky with a Canon EOS camera through a telescope.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary function of this Adapter ring EOS \/ T-mount?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts primary function is to allow you to attach a \u003cstrong\u003eCanon EOS DSLR or mirrorless camera body\u003c\/strong\u003e to any telescope or accessory that uses the standard \u003cstrong\u003eM42x0.75 T-thread\u003c\/strong\u003e. This enables prime-focus astrophotography by placing your camera's sensor 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\"\u003eCan I use this adapter to attach my Canon EOS Rebel to my 8\" SCT for imaging Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e You would attach this adapter ring to your Canon Rebel body in place of the lens. Then, you would typically thread the camera onto a separate SCT T-Adapter, which screws onto the rear cell of your telescope. This places your camera's sensor at the correct position to capture a focused image of Jupiter.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill autofocus and electronic aperture control work with this EOS \/ T-mount adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e This is a purely mechanical adapter and does not have any electronic contacts. It cannot pass power or data between the camera body and the telescope. You must use your camera in full \u003cstrong\u003eManual (M) mode\u003c\/strong\u003e for both focusing and exposure control.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat accessories besides a telescope use the M42x0.75 T-mount thread?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe M42x0.75 T-thread is a universal standard in astronomy. You can use this adapter to connect your Canon EOS camera to a wide range of imaging accessories, including:\u003c\/p\u003e\n    \u003cul\u003e\n    \u003cli\u003eFilter wheels and filter drawers\u003c\/li\u003e\n    \u003cli\u003eOff-axis guiders (OAGs)\u003c\/li\u003e\n    \u003cli\u003eField flatteners and focal reducers\u003c\/li\u003e\n    \u003cli\u003eComa correctors\u003c\/li\u003e\n    \u003cli\u003eExtension tubes for adjusting back focus\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 adapter compatible with both full-frame (EF) and crop-sensor (EF-S) Canon EOS cameras?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e The physical bayonet mount is identical on both full-frame (e.g., Canon 5D, 6D, Ra) and crop-sensor APS-C (e.g., Canon Rebel series, 90D, 7D) camera bodies. This adapter will securely fit all Canon EOS DSLRs. It will also fit Canon EOS R-series mirrorless cameras when used with the standard Canon EF-EOS R mount adapter.\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 connect my camera to a 2\" focuser using this adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This adapter provides the T-threads on your camera body. To connect to a 2\" focuser, you will also need a separate \"2-inch prime focus adapter.\" This is a simple barrel with male T-threads on one end (which screw into this adapter) and a 2-inch nosepiece on the other end that slides into your telescope's focuser.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943026520349,"sku":"SHK-BA0023","price":313.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Adapter-ring-EOS-T-mount-1_f233299b-7662-44cb-ab7b-33777ac934cf.jpg?v=1789615793"},{"product_id":"shelyak-ba0027","title":"Shelyak T-mount adapter ring for SCT","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Shelyak spectrographs to Schmidt-Cassegrain telescopes\u003c\/li\u003e\n\u003cli\u003eMale M42x0.75 T-mount thread for instrument connection\u003c\/li\u003e\n\u003cli\u003eFemale 2-inch thread for SCT rear-cell attachment\u003c\/li\u003e\n\u003cli\u003eFully compatible with standard 0.63x focal reducers\u003c\/li\u003e\n\u003cli\u003eProvides a rigid, tilt-free threaded 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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eT-mount adapter ring for SCT\u003c\/h2\u003e\n      \u003cp\u003eThis T-mount adapter ring for SCT provides a direct M42x0.75 T-thread connection for your spectrograph, attaching securely to the 2-inch rear cell thread of standard Meade and Celestron telescopes. This essential component is engineered to create a rigid optical train and is fully compatible with common 0.63x focal reducers, allowing you to optimize your SCT's focal ratio for spectroscopy.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSecure M42x0.75 Connection for Shelyak Spectrographs\u003c\/h3\u003e\n      \u003cp\u003eDesigned for scientific instrumentation, this adapter creates a solid, threaded link between your telescope and spectrograph. It is the ideal solution for attaching Shelyak instruments like the Alpy 600, LISA, or UVEX to any Schmidt-Cassegrain telescope or accessory with a standard 2-inch male thread.\u003c\/p\u003e\n      \u003cp\u003eThe male M42x0.75 T-threads ensure a non-flexing, perfectly aligned connection to your instrument. Compared to a simple slip-fit nosepiece, this threaded adapter eliminates the possibility of tilt or sag, which is critical for maintaining precise focus and calibration during long spectroscopic exposures.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eFull Compatibility with 0.63x SCT Focal Reducers\u003c\/h3\u003e\n      \u003cp\u003eThis adapter is specifically designed to work seamlessly with the classic 0.63x focal reducers used on most SCTs. By placing the reducer between the telescope and this adapter, you can shorten your instrument's effective focal length and increase its light-gathering speed.\u003c\/p\u003e\n      \u003cp\u003eAchieving a faster focal ratio is highly advantageous for spectroscopy, as it concentrates more light onto the spectrograph's slit, increasing signal-to-noise ratio and reducing required exposure times for faint targets. This adapter ensures you can integrate a reducer into your imaging train without compatibility issues.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for this SCT T-mount adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter's primary function is to connect an instrument with a female T-thread (M42x0.75), such as a Shelyak spectrograph or a DSLR camera with a T-ring, directly to the rear cell of a Schmidt-Cassegrain telescope (SCT) that uses a standard 2-inch thread.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich specific Shelyak instruments is this SCT T-mount adapter designed for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter is confirmed to be compatible with a range of Shelyak instruments, including the \u003cstrong\u003eeShel FIGU\u003c\/strong\u003e, \u003cstrong\u003eAlpy 600\u003c\/strong\u003e, \u003cstrong\u003eLISA\u003c\/strong\u003e, and \u003cstrong\u003eUVEX\u003c\/strong\u003e spectrographs, allowing them to be securely mounted on Meade or Celestron SCTs.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter work with my Celestron EdgeHD 8\" telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The Celestron EdgeHD 8\" uses the standard 2-inch SCT thread on its rear cell, making it fully compatible with this adapter. You can thread the adapter directly onto the telescope's visual back or onto a compatible focal reducer.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this SCT T-mount adapter with a 0.63x focal reducer on my Meade LX200?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. This adapter is specifically designed for this scenario. You would first thread your 0.63x reducer onto the rear cell of your Meade LX200, and then thread this adapter onto the male threads of the focal reducer.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the thread sizes on this SCT T-mount adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter features two standard threads:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eTelescope Side:\u003c\/strong\u003e A female 2-inch (50.8mm) thread to attach to an SCT.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eInstrument Side:\u003c\/strong\u003e A male M42x0.75 T-mount thread to attach to a camera or spectrograph.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use this threaded SCT T-mount adapter instead of a 2\" nosepiece for my spectrograph?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA threaded connection is significantly more secure and rigid than a slip-fit nosepiece held by set screws. For sensitive applications like spectroscopy, this adapter prevents instrument tilt and flexure, ensuring that your calibration and focus remain stable throughout an imaging session.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInstrument Connection\u003c\/td\u003e\n\u003ctd\u003eMale T-Thread (M42x0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003eFemale 2-inch SCT Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak eShel FIGU, Alpy 600, LISA, UVEX; 0.63x Focal Reducers\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\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eT-mount adapter ring for SCT\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943026782493,"sku":"SHK-BA0027","price":125.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-T-mount-adapter-ring-for-SCT-1_146119ff-7909-4e18-be3f-f81f410526d6.jpg?v=1789615802"},{"product_id":"shelyak-ba0034","title":"Shelyak C-mount to T-mount adapter ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects female C-mount threads (25.4mm) to male T-mount threads (M42x0.75mm)\u003c\/li\u003e\n\u003cli\u003eEnables use of larger T-mount cameras on C-mount guide ports or accessories\u003c\/li\u003e\n\u003cli\u003eAll-metal construction for secure, flex-free connections\u003c\/li\u003e\n\u003cli\u003eLow profile design minimizes added back focus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eC-mount to T-mount adapter ring\u003c\/h2\u003e\n      \u003cp\u003eThis C-mount to T-mount adapter ring physically connects two essential standards in astronomical and industrial imaging. It features a male M42x0.75mm T-thread on one side and a female internal 25.4mm C-mount thread on the other, providing a simple, rigid solution for integrating hardware that would otherwise be incompatible.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eConnecting T-Mount Cameras to 25.4mm C-Mount Ports\u003c\/h3\u003e\n      \u003cp\u003eThe primary function of this adapter is to mount a camera with T-threads—such as a DSLR or a large-sensor astronomy camera—onto a device with a female C-mount port. This is a common requirement when using an off-axis guider's guide port, a microscope eyepiece port, or other specialized optical equipment that defaults to the smaller C-mount standard. This converter allows you to use your preferred, often larger, guide camera where only a C-mount was previously possible. Note that depending on your camera's sensor position, an additional C\/CS-mount spacer ring may be required to achieve the correct back focus.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for this C-mount to T-mount adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts main purpose is to allow a camera or accessory with male \u003cstrong\u003eT-threads (M42x0.75mm)\u003c\/strong\u003e to be attached to a device with a female \u003cstrong\u003eC-mount thread (25.4mm)\u003c\/strong\u003e. This is most often used to connect a larger format guide camera to a smaller C-mount guide port on an off-axis guider or finderscope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the exact thread specifications for this adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter has two distinct threads:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMale Thread:\u003c\/strong\u003e M42x0.75mm, commonly known as T-mount or T2-mount.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFemale Thread:\u003c\/strong\u003e 25.4mm (1-inch) diameter with 32 threads per inch, which is the C-mount standard.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter to attach my DSLR camera to a microscope C-mount port?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this is a valid application. If your DSLR has a standard T-ring attached (which provides male M42x0.75mm threads), this adapter will allow you to screw it directly onto a C-mount photo port on a microscope, assuming you can achieve focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need additional spacers for my guide camera to reach focus with this adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003ePossibly. The C-mount standard has a flange-to-sensor distance of 17.526mm, while the related CS-mount is 12.5mm. If your guide camera is CS-mount native, you will likely need a 5mm C\/CS spacer ring in the optical train to reach focus. This adapter does not change that fundamental spacing requirement.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this adapter the same as a T-ring for a camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. A T-ring adapts a specific camera brand's lens mount (like Canon EF or Nikon F) to a male T-thread. This adapter takes an existing male T-thread and converts it to fit into a female C-mount port. You would typically use a T-ring on your camera first, and then attach this adapter to the T-ring.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this C-mount to T-mount adapter add significant length to the optical path?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this type of adapter is designed to be as thin as possible to minimize its impact on back focus. While it adds a few millimeters, it is generally considered a \"low profile\" adapter and should not prevent you from reaching focus in most setups that have sufficient travel.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM42x0.75mm (T-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003e25.4mm x 32 TPI (C-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eAdapts T-mount (male) to C-mount (female)\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\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eC-mount to T-mount adapter ring\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027110173,"sku":"SHK-BA0034","price":78.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-C-mount-to-T-mount-adapter-ring-1_a212b217-1888-4862-8fe6-79bd63e0c2df.jpg?v=1789615810"},{"product_id":"shelyak-ba0036","title":"Shelyak C\/CS Adapter Ring (5mm Spacer)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides 5mm of critical spacing\u003c\/li\u003e\n\u003cli\u003eAdapts C-mount lenses for use on CS-mount cameras\u003c\/li\u003e\n\u003cli\u003eStandard C-mount (male) to CS-mount (female) threads\u003c\/li\u003e\n\u003cli\u003ePrecision-machined metal construction for secure 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\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eC\/CS Adapter Ring (5mm Spacer)\u003c\/h2\u003e\n      \u003cp\u003eThis C\/CS adapter ring provides the essential 5mm of spacing required to achieve perfect focus when using standard C-mount lenses on cameras with a CS-mount. Many modern astronomical guide cameras and planetary imagers use the CS-mount standard, which has a shorter flange-to-sensor distance than the C-mount standard common on security and industrial lenses.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eBridge the 5mm Back Focus Gap for C-Mount Lenses\u003c\/h3\u003e\n      \u003cp\u003eC-mount lenses are designed to focus at a point farther away from the sensor than a native CS-mount camera can accommodate. Without correction, a C-mount lens will be unable to reach infinity focus on a CS-mount camera. This adapter ring acts as a simple, rigid 5mm extension that precisely bridges this mechanical gap, restoring the correct back focus.\u003c\/p\u003e\n      \u003cp\u003eInstallation is straightforward: simply thread the adapter onto your CS-mount camera body, and then thread your C-mount lens into the adapter. It's a fundamental accessory for anyone repurposing C-mount optics for astronomical imaging and is often paired with a T-mount to C-mount ring for connecting to a telescope's optical train.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this C\/CS adapter ring used for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis is a \u003cstrong\u003e5mm spacer\u003c\/strong\u003e designed to let you use a \u003cstrong\u003eC-mount lens\u003c\/strong\u003e on a \u003cstrong\u003eCS-mount camera\u003c\/strong\u003e. It adds the necessary distance between the lens and the camera sensor to allow the lens to achieve proper focus, especially at infinity.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need a 5mm spacer for a C-mount lens on my CS-mount camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe C-mount and CS-mount standards have different back focus requirements—the required distance from the lens mounting flange to the sensor plane. C-mount lenses require a longer distance. This 5mm ring provides that exact amount of extra spacing needed for a C-mount lens to work correctly on a CS-mount body.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this C\/CS adapter ring to put a CS-mount lens on a C-mount camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this adapter will not work for that purpose. A CS-mount lens needs to be closer to a C-mount sensor, but this adapter only adds distance. Attempting to use a CS-mount lens on a C-mount camera, even without an adapter, will typically result in an inability to reach focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 5mm C\/CS adapter ring work with my ZWO ASI120MM Mini guide camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The ZWO ASI120MM Mini, like many popular guide cameras, has a CS-mount. If you want to use a C-mount guide lens with it, you will need this 5mm C\/CS adapter ring to achieve focus. This applies to most cameras that ship with a CS-mount as their primary interface.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat happens if I don't use this C\/CS adapter ring with my C-mount security lens?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWithout this 5mm adapter, your C-mount security or industrial lens will not be able to focus on a CS-mount camera. The image will be blurry because the lens cannot be moved far enough away from the sensor to form a sharp image. This ring is the essential component to make that combination work.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this C\/CS adapter ring work with a T-mount adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt's common to use a T-to-C-mount adapter to connect a CS-mount camera to a telescope focuser or other T-threaded accessory. In this setup, the 5mm C\/CS ring would typically be threaded onto the camera first, followed by the T-to-C-mount adapter, ensuring all spacing requirements are met.\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\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eC\/CS Adapter Ring\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027372317,"sku":"SHK-BA0036","price":56.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-C-CS-adapter-ring-1_f0cb25ff-f190-43f0-a271-1d8c1ba476c5.jpg?v=1789615818"},{"product_id":"shelyak-ba0043","title":"Shelyak T-Mount to Canon EOS DSLR Adapter Ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Canon EOS DSLR camera bodies to T-Mount accessories\u003c\/li\u003e\n\u003cli\u003eStandard female T-threads (M42x0.75)\u003c\/li\u003e\n\u003cli\u003eDurable, all-metal construction for a secure, light-tight fit\u003c\/li\u003e\n\u003cli\u003eLow profile design minimizes added back focus\u003c\/li\u003e\n\u003cli\u003eSpecifically recommended for Shelyak LISA, Lhires III, Alpy, and UVEX spectroscopes\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eT-Mount to Canon EOS DSLR Adapter Ring\u003c\/h2\u003e\n      \u003cp\u003eThe T-Mount to Canon EOS DSLR Adapter Ring creates the essential physical connection between your camera body and any astronomical accessory with male T-threads. This ring allows you to mount a Canon EOS digital camera directly to instruments like the Shelyak LISA, Lhires III, Alpy, or UVEX spectroscope. It transforms your DSLR from a photographic tool into a component of a scientific instrument, enabling you to capture stellar and nebular spectra.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSecure Mechanical Link for Canon EOS Astrophotography\u003c\/h3\u003e\n      \u003cp\u003eThis adapter provides a rigid, non-rotating connection between the Canon EOS bayonet mount and the universal T-thread standard (M42x0.75). The all-metal construction ensures that your camera is held securely without flexure, which is critical for maintaining focus and alignment throughout an imaging session. Its low-profile design adds minimal length to the optical path, helping you reach focus with a variety of telescopes and accessories.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eDesigned for Shelyak Spectroscopes: LISA, Lhires III, Alpy \u0026amp; UVEX\u003c\/h3\u003e\n      \u003cp\u003eWhile this T-ring works with any T-threaded accessory, it is the specific adapter recommended for attaching a Canon DSLR to Shelyak's line of high-resolution spectroscopes. Whether you are using a LISA, Lhires III, Alpy, or UVEX model, this ring provides the correct interface for a direct and stable attachment. This enables you to leverage your existing camera sensor for astrophysical research, such as classifying stars or analyzing the composition of nebulae.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary function of this T-Mount to Canon EOS adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter's primary function is to connect a \u003cstrong\u003eCanon EOS DSLR camera body\u003c\/strong\u003e to an accessory that has male \u003cstrong\u003eT-threads (M42x0.75)\u003c\/strong\u003e. It allows you to use your camera for astrophotography or scientific applications like spectroscopy by physically attaching it to telescopes, spectrographs, or other T-threaded optical equipment.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter work with my Shelyak Lhires III spectroscope and a Canon 5D Mark IV?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. This is the correct adapter for connecting any Canon EOS camera body, including a full-frame model like the 5D Mark IV, to a Shelyak Lhires III spectroscope. The ring mates the camera's EF bayonet mount to the T-threads on the spectroscope for a secure fit.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Canon EOS Rebel T7i. Can I use it for spectroscopy on an Alpy 600 with this ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. This T-ring is fully compatible with all Canon EOS cameras, including the Rebel series with APS-C sensors like the T7i. It will allow you to mount your camera directly to the Shelyak Alpy 600 spectroscope to begin your spectroscopy work.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this the correct adapter to attach a Canon EF lens to a T-mount camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this adapter works in the opposite direction. It attaches a \u003cstrong\u003eCanon camera body\u003c\/strong\u003e to a \u003cstrong\u003eT-thread accessory\u003c\/strong\u003e. The adapter needed to attach a Canon EF lens to a T-mount camera is the complementary ring, part number BA0023.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the thread size of the T-Mount side of this adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe T-Mount, also known as a T2-mount, uses a standardized thread of \u003cstrong\u003eM42x0.75\u003c\/strong\u003e. This means it has a 42mm diameter with a 0.75mm thread pitch. This is a common standard in astronomy but should not be confused with the M42x1 \"Pentax screw mount\" used in older photography lenses.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the T-ring to my Canon EOS camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAttaching the T-ring is just like attaching a lens. With the camera body cap off, align the red dot on the T-ring with the red dot on your camera's lens mount. Gently press the ring against the mount and turn it clockwise until it clicks into place.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027536157,"sku":"SHK-BA0043","price":61.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-T-Mount-to-Canon-EOS-DSLR-adapter-ring-1_f1cea38f-d6a3-4044-82ff-bcce101deba1.jpg?v=1789615826"},{"product_id":"shelyak-el0166","title":"Shelyak Star Analyser 200 Mounting Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSecurely houses the Star Analyser 200 grating (sold separately)\u003c\/li\u003e\n\u003cli\u003eEnables easy integration into a standard 1.25\" or 2\" optical train\u003c\/li\u003e\n\u003cli\u003eEssential for using the SA-200 grating with filter wheels or camera nosepieces\u003c\/li\u003e\n\u003cli\u003eProvides a stable, correctly aligned mount for consistent results\u003c\/li\u003e\n\u003cli\u003eProtects the delicate diffraction grating from handling and debris\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\u003eStar Analyser 200 Mounting Kit\u003c\/h2\u003e\n\u003cp\u003eThis mounting kit provides the essential housing for the Star Analyser 200 diffraction grating. It is designed to securely hold the bare SA-200 grating, allowing you to integrate it seamlessly into your existing imaging train. By converting the standalone grating into a threaded cell, this kit enables its use in standard filter wheels, camera nosepieces, and other accessories, transforming it into a functional and protected spectroscopic tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSecure Your Star Analyser 200 for Spectroscopic Imaging\u003c\/h3\u003e\n\u003cp\u003eIf you have purchased the Star Analyser 200 grating as a standalone component, this mounting kit is the critical next step for putting it to use. The kit provides a precisely machined housing that protects the delicate grating while ensuring it is held flat and perpendicular to the optical axis. This stability is crucial for acquiring clean, high-resolution stellar spectra without flexure or misalignment.\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 Star Analyser 200 mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star Analyser 200 is often sold as a bare diffraction grating. This mounting kit provides a protective housing for that grating, converting it into a standard threaded cell. This allows you to mount the spectroscope in a filter wheel, eyepiece barrel, or camera nosepiece just like a standard filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this mounting kit for my Star Analyser 200?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf you purchased the Star Analyser 200 as a standalone grating without any housing, then yes, you will need this kit to use it with your telescope and camera. If you purchased a version of the Star Analyser that was already mounted in a cell, you do not need this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the mounting kit help me get a spectrum of a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy securing the Star Analyser 200 grating in your optical path, this kit allows you to capture the dispersed light from a bright star. When you image Vega through the mounted grating, its light is spread into a spectrum, revealing absorption lines like the Balmer series of hydrogen, which are characteristic fingerprints of the star's composition and temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Star Analyser 200 mounting kit compatible with a filter wheel on my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is one of its primary functions. The mounting kit is designed to create a cell with standard filter threads, allowing you to install the Star Analyser 200 into an empty slot in your filter wheel. This makes it easy to switch between standard imaging and spectroscopy during an observing session with your Schmidt-Cassegrain or other telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the mounting kit include the Star Analyser 200 grating itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this product is only the mounting kit (the housing). The Star Analyser 200 diffraction grating must be purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat tools are needed to install the grating into the Star Analyser 200 mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is typically straightforward and requires minimal tools, often just a retaining ring spanner or a similar tool to secure the grating inside the cell. Always handle the grating by its edges to avoid touching the optical surface.\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\u003eSpecifications\u003c\/td\u003e\n\u003ctd\u003eNo specifications available for this product.\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\/Shelyak_Star_Analyser_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\"\u003eShelyak Star Analyser Manual\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\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943029764381,"sku":"SHK-EL0166","price":63.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Star-Analyser-mounting-kit-1_8663a2dc-6413-493e-b61c-05045f0312d8.jpg?v=1789615891"},{"product_id":"shelyak-pu0019","title":"Shelyak T-mount front part for the Lhires III","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReplaces the standard Lhires III front panel\u003c\/li\u003e\n\u003cli\u003eProvides a female M42x0.75mm T-mount thread\u003c\/li\u003e\n\u003cli\u003eEnables direct connection to custom optical trains\u003c\/li\u003e\n\u003cli\u003eInstalls with the original 8 screws\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\u003eT-mount front part for the Lhires III\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak T-mount Front Part for the Lhires III converts the spectroscope's input to a standard female M42x0.75mm thread for direct connection to custom optical trains. Installation replaces the stock panel via 8 screws, creating a secure interface when the default Schmidt-Cassegrain adapter or 2-inch nosepiece is unsuitable for your setup.\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\u003eLhires III T-Mount Adapter: M42x0.75mm Female Thread for Custom Setups\u003c\/h3\u003e\n\u003cp\u003eThis T-mount adapter is the dedicated solution for integrating the Lhires III spectroscope into imaging setups that cannot use the standard Schmidt-Cassegrain adapter or a 2-inch nosepiece. It creates a direct, threaded M42x0.75mm connection point, eliminating potential flexure from slip-fit adapters and ensuring rigid collimation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Threaded Connection:\u003c\/strong\u003e Provides a secure M42x0.75mm female T-thread for direct attachment to off-axis guiders, filter wheels, or custom camera spacers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces Stock Panel:\u003c\/strong\u003e The part is a complete replacement for the original Lhires III front panel, installed by removing the existing 8 screws for a rigid, factory-fit integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternative to Standard Adapters:\u003c\/strong\u003e Specifically designed for astronomers whose setups require a T-thread interface instead of the included SCT or 2-inch adapters.\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\"\u003eWhen would I need the T-mount Front Part for my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need this part if your telescope, focuser, or camera setup requires a direct M42x0.75mm T-thread connection. It replaces the standard Lhires III front panel to provide this common interface, bypassing the need for the included SCT adapter or 2\" nosepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the T-mount Front Part installed on the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward. You simply remove the 8 screws holding the standard front panel on your Lhires III spectroscope, take the old panel off, and attach this new T-mount front part using the same 8 screws.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this T-mount Front Part with my 8\" f\/10 Schmidt-Cassegrain?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile you can, the standard adapter included with the Lhires III is already designed for Schmidt-Cassegrain telescopes. This T-mount part is intended for situations where the standard SCT adapter does not work, such as when you have an off-axis guider or filter wheel with T-threads in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this part change the back focus of the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis part replaces the front panel and establishes a new, standard M42x0.75mm connection point. You will need to calculate your spacing from this new reference plane to your camera sensor. It is not a simple spacer but a fundamental change to the instrument's input interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the T-mount Front Part for the Lhires III compatible with ZWO or QHY cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Most dedicated astronomy cameras from brands like ZWO and QHY use M42x0.75mm T-threads as their primary connection standard. This front part allows you to create a direct, rigid, all-threaded connection from your camera and accessories to the Lhires III spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the thread specification for this Lhires III T-mount adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter provides a standard female T-mount thread, which is specified as \u003cstrong\u003eM42x0.75mm\u003c\/strong\u003e. This ensures compatibility with the vast majority of T-rings, spacers, and accessories in the astronomy market.\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\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eFemale T-Mount (M42x0.75mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Lhires III Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eReplaces front panel (8 screws)\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\"\u003eT-mount front part for Lhires III\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943041134877,"sku":"SHK-PU0019","price":172.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-T-mount-front-part-for-the-Lhires-III-1_e0df2661-9fc7-4d82-849e-e3dc76a1c68d.jpg?v=1789616162"},{"product_id":"shelyak-pu0124","title":"Shelyak T-mount – 31.75mm nosepiece adapter ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M42x0.75mm T-mount accessories to 1.25\" focusers\u003c\/li\u003e\n\u003cli\u003eEnables secure threaded attachment for cameras and spectroscopes\u003c\/li\u003e\n\u003cli\u003eStandard 31.75mm (1.25\") barrel diameter\u003c\/li\u003e\n\u003cli\u003eLow-profile design minimizes back focus consumption\u003c\/li\u003e\n\u003cli\u003eBlack anodized aluminum construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eT-mount – 31.75mm nosepiece adapter ring\u003c\/h2\u003e\n\u003cp\u003eThis adapter bridges the critical gap between accessories using standard M42x0.75mm T-threads and any telescope equipped with a 1.25\" (31.75mm) focuser or eyepiece holder. It provides a secure, threaded connection essential for astrophotography and spectroscopy, replacing the simple slip-fit of a standard 1.25\" barrel.\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\u003eConnect M42 T-Threads to Any 1.25\" Focuser\u003c\/h3\u003e\n\u003cp\u003eThe M42x0.75mm thread, commonly known as the T-mount or T-thread, is a universal standard for cameras, filter wheels, and scientific instruments. This adapter allows you to attach any such device to the most common telescope format—the 1.25\" barrel—ensuring a rigid, non-flexing connection that is critical for sharp 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\u003eEssential for Lightweight Spectroscopes and DSLR Imaging\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the key component for mounting lightweight instruments that require a T-thread interface. It is used to attach a DSLR camera body (via its own T-ring) to a 1.25\" focuser for prime-focus imaging or to mount a spectroscope like the Shelyak Alpy 600 or Star'Ex for scientific analysis. It's also the required piece for using a Star Analyser 100 grating with a digital camera body. Please note: this adapter is intended for lighter accessories; heavier imaging trains should use a larger 2\" connection to prevent focuser strain. This component is included as a standard part with the Alpy 600 spectroscope.\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 T-mount – 31.75mm nosepiece adapter for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter allows you to connect any accessory that has a female \u003cstrong\u003eM42x0.75mm T-thread\u003c\/strong\u003e to a standard \u003cstrong\u003e1.25\" (31.75mm) telescope focuser\u003c\/strong\u003e. It converts the threaded T-mount into a simple barrel that can be inserted and secured just like an eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this T-mount adapter to attach my DSLR to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. You will need two components: a T-ring specific to your camera brand (e.g., Canon, Nikon, Sony) and this T-mount to 1.25\" adapter. The T-ring attaches to your camera body, and this adapter threads into the T-ring, allowing the entire assembly to slide into your telescope's 1.25\" focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this T-mount adapter compatible with the Shelyak Alpy 600 spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is fully compatible. In fact, this exact adapter is included with the Shelyak Alpy 600 spectroscope as the standard method for attaching the instrument to a telescope's 1.25\" focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach a Star Analyser 100 to my DSLR using this adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo use a Star Analyser 100 grating with a DSLR for stellar spectroscopy, you first attach a T-ring to your camera. Then, you thread this T-mount to 1.25\" adapter into the T-ring. Finally, you thread the Star Analyser 100 into the filter threads on the base of this adapter's 1.25\" barrel before inserting the whole assembly into the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter cause vignetting with my APS-C camera on an f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eGenerally, no. The 1.25\" barrel format can cause some corner illumination drop-off (vignetting) on larger APS-C sensors, especially in faster optical systems. However, in a slow f\/10 system like a Schmidt-Cassegrain Telescope (SCT), the light cone is narrow enough that vignetting is typically minimal and can be easily corrected with flat frames.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the threads on this T-mount adapter M42x0.75mm or M42x1mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe threads are \u003cstrong\u003eM42x0.75mm\u003c\/strong\u003e. This is the standard \"T-thread\" or \"T-mount\" used in astronomy and photography. It is not compatible with M42x1mm threads (often called Pentax screw mount) found on some older camera lenses.\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\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eT-Mount to 1.25\" Nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side\u003c\/td\u003e\n\u003ctd\u003e1.25\" (31.75mm) Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Side\u003c\/td\u003e\n\u003ctd\u003eMale M42x0.75mm T-Threads\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\"\u003eT-mount – 31.75mm nosepiece adapter ring\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943041823005,"sku":"SHK-PU0124","price":73.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-T-mount-31-75mm-nosepiece-adapter-ring-1_d12ac345-a31a-44c6-8eeb-cbd0e32263b4.jpg?v=1789616178"},{"product_id":"shelyak-pu0149","title":"Shelyak ST8\/10 adapter for Alpy 600","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCustom adapter for SBIG ST7, ST8, ST10, and ST2000 cameras\u003c\/li\u003e\n\u003cli\u003eMounts compatible SBIG cameras to a Shelyak Alpy 600 spectroscope\u003c\/li\u003e\n\u003cli\u003eReplaces the camera's standard front plate\u003c\/li\u003e\n\u003cli\u003eSolves the mechanical backfocus incompatibility between these devices\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\u003eST8\/10 adapter for Alpy 600\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak ST8\/10 Adapter for Alpy 600 is the specific mechanical flange required to mount classic SBIG ST7, ST8, ST10, and ST2000 series cameras onto the Alpy 600 spectroscope. This adapter directly addresses the excessive mechanical backfocus of these cameras, which otherwise prevents a secure and focused connection.\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\u003eSolving SBIG Backfocus for Alpy 600 Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThe mechanical design of SBIG's ST7, ST8, ST10, and ST2000 cameras results in a backfocus distance that is too large for direct attachment to an Alpy 600 spectroscope. This adapter is not a simple spacer; it is a replacement front plate for the camera body. By removing the camera's original plate and installing this custom flange, you physically shorten the optical path to achieve the correct spacing for spectroscopy with the Alpy 600.\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\u003eCritical Installation and Focusing Warning for ST7\/ST8\/ST10\/ST2000 Cameras\u003c\/h3\u003e\n\u003cp\u003eWhen this adapter is installed, the front lens of the Alpy 600 spectroscope is positioned extremely close to the protective window of the CCD sensor. You must exercise extreme care when focusing the spectrum. Racking the focuser in too far can cause the Alpy's lens to make physical contact with the camera's window, risking permanent damage to both optics.\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\"\u003eWhich SBIG cameras is the ST8\/10 adapter for Alpy 600 compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is specifically designed for the SBIG ST7, ST8, ST10, and ST2000 model CCD cameras. It will not work with other SBIG models or cameras from other manufacturers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the ST8\/10 adapter necessary for using my SBIG ST7 with an Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe standard mechanical backfocus of the SBIG ST7 camera is too long to allow the Alpy 600 spectroscope to reach focus. This adapter replaces the camera's front plate, effectively reducing the distance to bring it within the Alpy's required range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Shelyak ST8\/10 adapter on my SBIG camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation requires you to carefully remove the original front plate from your SBIG camera body. This adapter flange is then mounted in its place. This is a modification to your camera and should be done with care.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the biggest risk when using the ST8\/10 adapter with my Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary risk is optical damage during focusing. The adapter brings the Alpy's lens very close to the CCD window. You must focus slowly and carefully to avoid the two surfaces touching, which could scratch or crack the optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I want to capture the spectrum of Vega (Alpha Lyrae) with my SBIG ST8 and Alpy 600, is this adapter all I need?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is the essential mechanical link between your SBIG ST8 and the Alpy 600. Once they are physically connected using this adapter, you will still need to mount the entire assembly to your telescope and proceed with standard spectroscopic acquisition procedures, including focusing and calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Alpy 600 ST8\/10 adapter to connect my camera to other Shelyak spectroscopes like the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This adapter is engineered exclusively for the Alpy 600 spectroscope. The backfocus requirements and mechanical interfaces for other spectroscopes, like the Lhires III, are different and require their own specific adapters.\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\u003eShelyak Alpy 600 Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Compatibility\u003c\/td\u003e\n\u003ctd\u003eSBIG ST7, ST8, ST10, ST2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCorrects mechanical backfocus for camera attachment\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\"\u003eST8\/10 adapter for Alpy 600\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943042085149,"sku":"SHK-PU0149","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-ST8-10-adapter-for-Alpy-600-1_4bf08066-01f7-436f-8ae7-9e98ff2ba9ea.jpg?v=1789616187"},{"product_id":"shelyak-se0012","title":"Shelyak Lhires III adapter set (23 mm camera)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects cameras to the Shelyak Lhires III spectroscope\u003c\/li\u003e\n\u003cli\u003eDesigned for cameras with a backfocus between 21.35 mm and 25.35 mm\u003c\/li\u003e\n\u003cli\u003eOptimized for common camera backfocus distances around 23 mm\u003c\/li\u003e\n\u003cli\u003eProvides a rigid, secure connection for precise sensor alignment\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\u003eLhires III adapter set (23 mm camera)\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Lhires III adapter set for 23 mm cameras enables you to mount a camera with a native backfocus between 21.35 mm and 25.35 mm to your Lhires III spectroscope, ensuring the sensor is positioned at the precise focal plane required for high-resolution spectroscopy.\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\u003ePrecision Mounting for Cameras with 21.35mm to 25.35mm Backfocus\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the critical link between your Lhires III spectroscope and a camera with a backfocus in the 21.35 mm to 25.35 mm range. Achieving the correct spacing is non-negotiable in spectroscopy, and this component creates a rigid, repeatable connection for accurate data acquisition.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted Compatibility:\u003c\/strong\u003e Specifically engineered for the Lhires III, this adapter solves the mounting problem for a popular class of cameras, such as those with a nominal backfocus of 23 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified Integration:\u003c\/strong\u003e By using this adapter, you eliminate the need for custom-machined parts or unstable stacks of generic extenders, securing your camera directly to the spectroscope's optical path.\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 Lhires III adapter set for 23 mm cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter connects a camera with a specific backfocus range (21.35 mm to 25.35 mm) to a Shelyak Lhires III spectroscope. It ensures the camera sensor is placed at the correct distance from the spectroscope's optics for a sharp spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are compatible with this Lhires III adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAny camera with a native backfocus that falls between \u003cstrong\u003e21.35 mm and 25.35 mm\u003c\/strong\u003e can be used with this adapter. While the title refers to \"23 mm cameras,\" it supports the full specified range. You must confirm your camera's backfocus before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this specific Lhires III adapter for my spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need this adapter only if your imaging camera has a backfocus within the 21.35 mm to 25.35 mm range. Shelyak offers different adapters for cameras with other backfocus distances, such as standard 17.5 mm C-mount cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this Lhires III adapter ensure I get a good spectrum of a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy precisely setting the camera distance, this adapter guarantees that the light from Vega passing through the Lhires III slit and grating forms a sharply focused spectrum on your sensor. Incorrect spacing would result in blurred spectral lines, making it impossible to measure features like the Balmer absorption lines accurately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Lhires III adapter with a standard DSLR on my f\/8 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is highly unlikely. Most DSLRs have a much longer backfocus (typically 44 mm for Canon EF or 46.5 mm for Nikon F-mount) and would not be compatible with this adapter. This adapter is designed for dedicated astronomy cameras that fall within the 21.35 mm to 25.35 mm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this adapter difficult to install on the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward. The adapter is designed to thread or bolt directly onto the Lhires III's camera port, providing a secure mechanical and optical interface for your camera.\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\u003eCompatible Spectroscope\u003c\/td\u003e\n\u003ctd\u003eShelyak Lhires III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e21.35 mm to 25.35 mm\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\"\u003eLhires III adapter set (23 mm camera)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943043952925,"sku":"SHK-SE0012","price":171.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Lhires-III-adapter-set-23-mm-camera-1_6e4d4cf1-fcda-4c9a-816a-590b4451e658.jpg?v=1789616236"},{"product_id":"shelyak-se0014","title":"Shelyak Adapter set for Lhires III (camera with backfocus 17 mm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects cameras with 17 mm backfocus to a Lhires III spectrograph\u003c\/li\u003e\n\u003cli\u003eEnsures precise sensor-to-spectrograph spacing\u003c\/li\u003e\n\u003cli\u003eCritical for achieving optimal spectral focus and resolution\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for the Shelyak Lhires III\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\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 set for Lhires III (camera with backfocus 17 mm)\u003c\/h2\u003e\n      \u003cp\u003eThis Shelyak adapter set is the essential component for coupling a camera with a specific 17 mm backfocus to the Lhires III spectrograph. Achieving this exact 17 mm spacing is not optional; it is the fundamental requirement for placing the camera sensor at the precise focal plane of the spectrograph's optical system, ensuring your spectra are sharply focused from one end to the other.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eAchieving Critical 17 mm Spacing for the Lhires III\u003c\/h3\u003e\n      \u003cp\u003eIn high-resolution spectroscopy, focus is paramount. The Lhires III is designed with a specific focal plane, and this adapter set ensures your camera's sensor lands exactly on it. Using the correct adapter for your camera's 17 mm backfocus eliminates vignetting and image degradation, producing clean, scientifically valid data for stellar classification, radial velocity measurements, or emission line analysis.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this Shelyak adapter set for the Lhires III used for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter set is designed to physically connect a camera with a \u003cstrong\u003e17 mm backfocus\u003c\/strong\u003e to the Shelyak Lhires III spectrograph. Its primary purpose is to establish the precise, rigid spacing required for the camera's sensor to be at the spectrograph's focal plane.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 17 mm backfocus specification so important for the Lhires III?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eSpectrographs like the Lhires III have a fixed optical design with a very specific focal plane. If the camera sensor is too close or too far away, the resulting spectrum will be out of focus, blurred, and unusable for scientific analysis. This adapter guarantees the correct \u003cstrong\u003e17 mm distance\u003c\/strong\u003e is maintained.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter set for a camera with a different backfocus, like 13 mm, on my Lhires III?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This adapter set is machined specifically for cameras that have a native backfocus of \u003cstrong\u003e17 mm\u003c\/strong\u003e. Using it with a camera that has a different backfocus will result in an incorrect sensor position and poorly focused spectra. You must use the adapter set that matches your camera's backfocus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are compatible with this Lhires III adapter set?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAny astronomical camera that has a native backfocus of \u003cstrong\u003e17 mm\u003c\/strong\u003e is compatible with this adapter set. It is crucial to check your camera's technical specifications to confirm its backfocus distance before purchasing an adapter.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIf I use this 17 mm adapter with my Lhires III on an 8\" SCT to observe Vega (Alpha Lyrae), what is the goal?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe goal is to obtain a high-resolution spectrum of Vega, a type A0V star. This adapter ensures your camera is perfectly focused to capture the distinct hydrogen Balmer absorption lines (like H-alpha and H-beta) in Vega's atmosphere. Precise focus is critical for measuring the width and depth of these lines, which is a key part of stellar classification.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install this adapter set on my Lhires III spectrograph?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eInstallation typically involves threading the components of the adapter set onto the camera port of the Lhires III and then attaching your camera to the other side. For detailed instructions, you should refer to the main user manual for the Shelyak Lhires III spectrograph, as the adapter is a component of that system.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Lhires III Spectrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRequired Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e17 mm\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\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eAdapter Set for Lhires III (17 mm Backfocus)\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003eComponents as required\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\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\/Shelyak_Lhires_III_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\"\u003eShelyak Lhires III Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943044247837,"sku":"SHK-SE0014","price":171.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Adapter-set-for-Lhires-III-camera-with-backfocus-17-mm-1_4645ba94-e147-42ae-9cb3-95b72ff04884.jpg?v=1789616244"},{"product_id":"shelyak-se0080","title":"Shelyak Adapter set for Lhires III (camera with 25mm backfocus)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCompatibility: Shelyak Lhires III Spectroscope\u003c\/li\u003e\n\u003cli\u003eRequired Camera Backfocus: 23.35mm to 27.35mm\u003c\/li\u003e\n\u003cli\u003eEnsures Precise Sensor-to-Optics Spacing\u003c\/li\u003e\n\u003cli\u003eCritical for High-Resolution Spectroscopy\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 set for Lhires III (camera with 25mm backfocus)\u003c\/h2\u003e\n\u003cp\u003eThis adapter set for the Shelyak Lhires III spectroscope provides the precise mechanical connection for cameras that require a backfocus between 23.35mm and 27.35mm, ensuring the sensor is positioned correctly at the focal plane for high-resolution spectroscopy.\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\u003ePrecise Spacing for Lhires III: The 23.35mm to 27.35mm Backfocus Solution\u003c\/h3\u003e\n\u003cp\u003eIn spectroscopy, achieving perfect focus is paramount. This adapter set is engineered to solve the specific backfocus challenge for cameras in the 23.35mm to 27.35mm range, positioning the sensor precisely where the Lhires III forms its spectrum. This specificity is its strength, but also its limitation: it is not a universal adapter and will only work for cameras within this exact window.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical for Resolution:\u003c\/strong\u003e Without this exact spacing, spectral lines will appear blurred, compromising the resolution and scientific value of your data by destroying the sharpness of emission and absorption lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates Guesswork:\u003c\/strong\u003e Provides a rigid, repeatable connection that removes a major variable from your optical train, allowing you to focus on data acquisition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for Lhires III:\u003c\/strong\u003e Mates seamlessly with the spectroscope's optical output, maintaining the alignment necessary for accurate results.\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 cameras are compatible with this Shelyak Lhires III adapter set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter set is designed for any camera, typically a CCD or CMOS model, that has a native backfocus distance between \u003cstrong\u003e23.35mm and 27.35mm\u003c\/strong\u003e. You must check your camera's technical specifications to confirm its backfocus before purchasing this adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a specific backfocus adapter like this needed for the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Shelyak Lhires III spectroscope has a fixed focal plane where the spectrum is formed. This adapter ensures the camera's sensor is placed exactly at that plane. Incorrect spacing results in a defocused spectrum, which blurs spectral lines and makes the data unusable for scientific analysis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Lhires III adapter if my camera's backfocus is outside the 23.35mm to 27.35mm range?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter set is not suitable for cameras outside the specified 23.35mm to 27.35mm backfocus range. Using it would prevent you from reaching proper focus. Shelyak offers different adapter sets for cameras with other backfocus requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm trying to capture the spectrum of Vega (Alpha Lyrae) with my Lhires III. Will this adapter work with a camera that has a 25mm backfocus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. A camera with a 25mm backfocus falls perfectly within the 23.35mm to 27.35mm range of this adapter set. It will provide the correct spacing to achieve a sharp, high-resolution spectrum of bright stars like Vega with your Lhires III.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I'm studying the H-alpha emission line of a nebula with the Lhires III, how does this adapter help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy ensuring your camera sensor is perfectly focused, this adapter allows the Lhires III to resolve fine details within the H-alpha emission profile. Precise focus is critical for detecting subtle Doppler shifts or structural changes in the emission line, which would be lost with incorrect spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this the only part I need to connect my camera to the Lhires III spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter set provides the correct backfocus spacing. However, you must also ensure that your camera's body has the appropriate mechanical threads to connect to the adapter itself. Please verify the thread type on both your camera and the Lhires III's output before assembly.\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\u003eShelyak Lhires III Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e23.35mm to 27.35mm\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\"\u003eAdapter set for Lhires III (25mm Backfocus)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943044608285,"sku":"SHK-SE0080","price":171.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Adapter-set-for-Lhires-III-camera-with-25mm-backfocus-1_aa8a58b1-29c1-4b4d-86a5-0b8edcc97e35.jpg?v=1789616252"},{"product_id":"shelyak-se0082","title":"Shelyak Adapter set for Lhires III (camera backfocus 34mm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects CCD\/CMOS cameras to a Shelyak Lhires III spectroscope\u003c\/li\u003e\n\u003cli\u003eEngineered for a nominal camera backfocus of 34mm\u003c\/li\u003e\n\u003cli\u003eAccommodates a backfocus range from 32.85mm to 36.85mm\u003c\/li\u003e\n\u003cli\u003eEnsures correct sensor placement for optimal spectral resolution\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\u003eAdapter set for Lhires III (camera backfocus 34mm)\u003c\/h2\u003e\n\u003cp\u003eThis adapter set is engineered specifically for the Shelyak Lhires III spectroscope, enabling you to mount a camera with a backfocus between 32.85mm and 36.85mm. Achieving this precise 34mm nominal spacing is critical for maintaining the spectroscope's optical resolution and preventing blurred spectral lines.\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\u003ePrecision Spacing: Achieving the Critical 34mm Backfocus for Lhires III\u003c\/h3\u003e\n\u003cp\u003eIn spectroscopy, sensor placement is not flexible. The optical design of the Lhires III demands that the camera sensor sits at a precise distance to record a sharp, well-resolved spectrum. This adapter set eliminates the guesswork and custom machining required to connect cameras that have a native backfocus in the 34mm range.\u003c\/p\u003e\n\u003cp\u003eIf your camera's sensor-to-flange distance falls between 32.85mm and 36.85mm, this set provides the exact mechanical interface needed for a rigid, perfectly spaced connection to your Lhires III. This ensures that the only variable you need to manage is focus, not component spacing.\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 this Lhires III adapter set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter set is designed to securely mount a camera onto a Shelyak Lhires III spectroscope, ensuring the camera's sensor is positioned at the correct optical distance. It is specifically made for cameras that have a native backfocus between \u003cstrong\u003e32.85mm and 36.85mm\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 34mm backfocus so important for the Lhires III spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lhires III's optical system is designed to form a sharp spectrum at a very specific focal plane. If the camera sensor is too close or too far, spectral lines will appear blurred and the instrument's resolving power will be compromised. This adapter guarantees the \u003cstrong\u003ecritical 34mm nominal spacing\u003c\/strong\u003e is achieved.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if my camera is compatible with this Lhires III adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCheck your camera's technical documentation for its backfocus, sometimes called \"sensor to flange distance.\" If this value is within the \u003cstrong\u003e32.85mm to 36.85mm range\u003c\/strong\u003e, this adapter is the correct solution for connecting it to your Lhires III.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter set with a spectroscope other than the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This adapter set is custom-designed for the specific mechanical threads and required focal distance of the Shelyak Lhires III spectroscope. It is not compatible with other instruments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a planetary camera with 12.5mm of backfocus. Will this adapter work with my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter will not work. It is designed for cameras with a much longer native backfocus of around 34mm. To use a camera with 12.5mm of backfocus, you would need a different solution involving extension tubes to make up the distance difference.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I use this adapter with my Lhires III to study the spectrum of Vega (Alpha Lyrae), will it ensure correct focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Provided your camera's backfocus is within the specified 32.85mm to 36.85mm range, this adapter places the sensor at the correct plane. This allows you to achieve a sharply focused spectrum of bright stellar targets like Vega, which is essential for detailed analysis.\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\u003eShelyak Lhires III Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e32.85mm to 36.85mm (34mm nominal)\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\"\u003eLhires III Adapter Set for 34mm Backfocus\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\/Shelyak_Lhires_III_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\"\u003eShelyak Lhires III Manual\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\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943045067037,"sku":"SHK-SE0082","price":171.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Adapter-set-for-Lhires-III-camera-backfocus-34mm-1_5818606c-89a6-41f3-98ef-d430dd8b7c7f.jpg?v=1789616261"},{"product_id":"shelyak-se0110","title":"Shelyak Acquisition Camera Ring Set: 13mm Backfocus","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e13mm Nominal Backfocus\u003c\/li\u003e\n\u003cli\u003eAccommodates Cameras with 9.15mm to 13.15mm Backfocus\u003c\/li\u003e\n\u003cli\u003eCompatible with Shelyak Lhires III Spectroscopes\u003c\/li\u003e\n\u003cli\u003eCompatible with Shelyak LISA Spectroscopes\u003c\/li\u003e\n\u003cli\u003eOfficial Standard-Issue Replacement Part\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\u003eAcquisition Camera Ring Set: 13mm Backfocus\u003c\/h2\u003e\n\u003cp\u003eThis acquisition camera ring set is the standard-issue adapter for Shelyak Lhires III and LISA spectroscopes, designed to position a camera sensor at the precise backfocus distance between 9.15mm and 13.15mm. It is the official factory component for mounting a guide or acquisition camera, ensuring the sensor sits exactly at the focal plane of the spectroscope's reflective slit.\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\u003eStandard-Issue Adapter for 9.15mm to 13.15mm Backfocus\u003c\/h3\u003e\n\u003cp\u003eAchieving the correct camera spacing is critical for accurate guiding during long spectroscopic exposures. This ring set is the original part supplied with new Lhires III and LISA instruments, built specifically to accommodate the common backfocus range of guide cameras from 9.15mm to 13.15mm. Whether you have misplaced the original adapter or need a spare, this component restores your instrument to its factory-specified configuration for reliable 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 is the purpose of the Shelyak 13mm Acquisition Camera Ring Set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis ring set is an adapter designed to mount an acquisition or guide camera onto a Shelyak \u003cstrong\u003eLhires III\u003c\/strong\u003e or \u003cstrong\u003eLISA\u003c\/strong\u003e spectroscope. Its primary function is to set the camera sensor at the correct backfocus distance, which must be between \u003cstrong\u003e9.15mm and 13.15mm\u003c\/strong\u003e, for accurate guiding on the instrument's reflective slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich spectroscopes is this 13mm ring set compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is specifically designed for and supplied as standard with the \u003cstrong\u003eShelyak Lhires III\u003c\/strong\u003e and \u003cstrong\u003eShelyak LISA\u003c\/strong\u003e series of spectroscopes. It is not intended for other models or brands.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy acquisition camera has a backfocus of 12.5mm. Will this adapter work with my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This adapter is designed for any camera with a backfocus between 9.15mm and 13.15mm. Since 12.5mm falls within this range, this is the correct adapter for connecting your camera to a Lhires III or LISA spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI lost the original camera adapter for my Lhires III spectroscope. Is this the correct replacement part?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is the official, standard-issue adapter that is supplied with new Lhires III and LISA instruments. If your original part is missing or damaged, this is the correct factory replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 9.15mm to 13.15mm backfocus critical for a Lhires III or LISA spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis specific distance ensures that your guide camera's sensor is perfectly parfocal with the spectroscope's reflective entrance slit. If the spacing is incorrect, the star used for guiding will be out of focus, leading to poor tracking accuracy and trailed stellar spectra during your science exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ring set to mount my main science camera to the spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter is intended only for the \u003cstrong\u003eacquisition and guiding camera port\u003c\/strong\u003e. The main science camera attaches to a different port on the spectroscope, which typically requires a different adapter and backfocus calculation.\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\/Shelyak_Lhires_III_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\"\u003eShelyak Lhires III Manual\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\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943046017309,"sku":"SHK-SE0110","price":162.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Acquisition-camera-ring-set-13mm-backfocus-1_0b9a9a3e-0651-4da8-8dcc-db65033a0c0f.jpg?v=1789616285"},{"product_id":"shelyak-se0129","title":"Shelyak C-mount adapter for the Alpy 600","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects C-mount cameras to the Shelyak Alpy 600\u003c\/li\u003e\n\u003cli\u003eProvides an adjustable backfocus range from 9.5mm to 20mm\u003c\/li\u003e\n\u003cli\u003eReplaces the standard T-mount thread on the spectroscope\u003c\/li\u003e\n\u003cli\u003eEnables use of common scientific and guiding cameras\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\u003eC-mount adapter for the Alpy 600\u003c\/h2\u003e\n\u003cp\u003eThis C-mount adapter for the Alpy 600 spectroscope allows you to set a precise camera backfocus between 9.5mm and 20mm. It replaces the native T-mount, opening up compatibility for C-mount cameras commonly used in spectroscopy that require a backfocus within this 9.5mm to 20mm range.\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\u003eC-Mount Compatibility and a 9.5mm to 20mm Backfocus Range\u003c\/h3\u003e\n\u003cp\u003eThe Shelyak Alpy 600 spectroscope is supplied with a standard T-mount for attaching a science camera. This adapter allows you to convert that interface to the C-mount standard, which is widely used by many compact, high-speed CMOS cameras ideal for spectroscopy.\u003c\/p\u003e\n\u003cp\u003eThe key feature is the adjustable backfocus, which can be set anywhere between 9.5mm and 20mm. This range gives you the flexibility to achieve a sharp focus with various camera models that have different sensor flange depths.\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\"\u003eWhy do I need this C-mount adapter for my Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Alpy 600 ships with a T-mount. This adapter is necessary if your science or guiding camera uses the C-mount standard, which is common for many high-frame-rate CMOS cameras. It physically converts the mount to ensure a secure, threaded connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 9.5mm to 20mm backfocus range on the Alpy 600 C-mount adapter mean?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is the range of distances you can set between the adapter's mounting flange and your camera's sensor to achieve a sharp focus on the spectroscope's slit. You will need to adjust within this range to match your specific camera's flange focal distance to get a sharp spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a guide camera with a 12.5mm backfocus. Can I use it with the Alpy 600 and this adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Since that camera's 12.5mm backfocus falls comfortably within the adapter's \u003cstrong\u003e9.5mm to 20mm adjustment range\u003c\/strong\u003e, you will be able to achieve proper focus. This makes it compatible with many popular C-mount cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter work for attaching my DSLR to the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. DSLR cameras typically use T-mounts (via a T-ring) and have a much longer backfocus requirement (around 55mm), which is far outside this adapter's 9.5mm to 20mm range. The Alpy 600's standard T-mount is the correct interface for a DSLR.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a C-mount connection as secure as a T-mount for the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for the cameras it's designed for. C-mount cameras are typically small and lightweight. The threaded C-mount connection provides a secure, non-flexing attachment essential for stable and repeatable spectroscopic work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the correct backfocus with this Alpy 600 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will typically start by referencing your camera's documentation for its flange-to-sensor distance. Set the adapter within its 9.5mm to 20mm range to match that distance, then perform fine focusing adjustments on the telescope to get a sharp spectrum.\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\u003eCamera Mount\u003c\/td\u003e\n\u003ctd\u003eC-mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectroscope Interface\u003c\/td\u003e\n\u003ctd\u003eReplaces Alpy 600 T-mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackfocus Range\u003c\/td\u003e\n\u003ctd\u003e9.5mm - 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Spectroscope\u003c\/td\u003e\n\u003ctd\u003eShelyak Alpy 600\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\"\u003eC-mount adapter for the Alpy 600\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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\/Shelyak_Alpy_600_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\"\u003eShelyak Alpy 600 Manual\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\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943047590173,"sku":"SHK-SE0129","price":106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-C-mount-adapter-for-the-Alpy-600-1_615451ca-76cd-4092-970c-608bf37473a2.jpg?v=1789616326"},{"product_id":"shelyak-se0131","title":"Shelyak Fiber Optic Adapter for Alpy 600","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects FC Standard Fiber Optics to the Alpy 600 Spectroscope\u003c\/li\u003e\n\u003cli\u003eReplaces the Standard 25µm Slit for Remote Light Injection\u003c\/li\u003e\n\u003cli\u003eEnables Bench-Mounted Setups and Remote Observatory Integration\u003c\/li\u003e\n\u003cli\u003eDesigned Specifically for the Shelyak Alpy 600\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\u003eFiber Optic Adapter for Alpy 600\u003c\/h2\u003e\n      \u003cp\u003eThis FC-standard fiber optic adapter replaces the standard slit on the Shelyak Alpy 600 spectroscope, enabling remote light acquisition for permanent observatory setups or controlled laboratory environments. While this adapter adds significant operational flexibility, it involves a direct trade-off: using a standard 50µm object fiber will result in lower spectral resolution than the Alpy 600's native 25µm slit.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe 50µm Fiber vs. the 25µm Slit\u003c\/h3\u003e\n      \u003cp\u003eThe primary function of this adapter is to couple your Alpy 600 to a fiber optic cable, allowing the spectroscope to be mounted on a stable bench away from the telescope. This isolates the instrument from vibration and temperature changes at the scope, but introduces a change in the optical path. A typical 50µm fiber optic core acts as a wider entrance aperture than the Alpy 600's standard 25µm slit, which reduces the instrument's resolving power. This is a critical consideration for users whose scientific goals demand the highest possible resolution; for applications where convenience and stability are paramount, the trade-off may be acceptable.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for the Alpy 600 Fiber Optic Adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter allows you to feed light into your Alpy 600 spectroscope via a fiber optic cable. This is ideal for \u003cstrong\u003eremote observatories\u003c\/strong\u003e where the telescope and spectroscope are physically separated, or for \u003cstrong\u003elaboratory work\u003c\/strong\u003e where the instrument is kept on a stable optical bench.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill using this adapter with the Alpy 600 affect my spectral resolution?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eYes, it will lower the resolution.\u003c\/strong\u003e The adapter is designed for standard 50µm optical fibers, which have a larger diameter than the Alpy 600's native 25µm slit. This wider entrance aperture reduces the spectroscope's resolving power. You gain remote capability at the cost of spectral detail.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I use the Fiber Optic Adapter for the Alpy 600 if it lowers resolution?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe main benefit is operational stability and convenience. By moving the Alpy 600 off the telescope and onto a stable bench, you can better control its temperature and isolate it from vibrations, which is crucial for long-term projects or precise calibration. This setup is common in permanently mounted observatory systems.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat type of fiber optic connector does this Alpy 600 adapter use?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter uses the industry-standard \u003cstrong\u003eFC connector\u003c\/strong\u003e, a common type used in telecommunications and scientific instrumentation for its secure, threaded connection.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Alpy 600 adapter to study a star like Vega (Alpha Lyrae) from my remote setup?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. You would connect a fiber optic cable from your telescope's focal plane to this adapter on the Alpy 600. This allows you to acquire the spectrum of Vega while the spectroscope remains in a controlled indoor environment, isolated from the telescope's movement and outdoor conditions. Just be mindful of the inherent reduction in resolution when planning your observation.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this adapter replace or add to the existing slit on the Alpy 600?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt \u003cstrong\u003ereplaces\u003c\/strong\u003e the standard slit module. You must remove the existing slit assembly from the Alpy 600 and install this fiber optic adapter in its place.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Alpy 600 Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eFC Standard\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\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eFiber Optic Adapter for Alpy 600\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\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\/Shelyak_Alpy_600_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\"\u003eShelyak Alpy 600 Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943047917853,"sku":"SHK-SE0131","price":230.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Fiber-optic-adapter-for-Alpy-600-1_ac7f339d-5cf4-4066-ab5a-173860cec57c.jpg?v=1789616334"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/spectrograph-adapters.oembed","provider":"David Astro","version":"1.0","type":"link"}