{"title":"Kits de spectrographe Shelyak Star'Ex","description":"\u003cp\u003eLes kits Shelyak Star'Ex fournissent les optiques du Star'Ex, spectrographe stellaire à construire soi-même, conçu par Christian Buil comme compagnon nocturne du Sol'Ex, avec des pièces imprimées en 3D. La version LR donne des spectres à basse résolution des étoiles et nébuleuses, avec un complément IR pour le proche infrarouge, la version HR une haute résolution pour des profils de raies fins.\u003c\/p\u003e\u003cp\u003eUn kit HR complémentaire réutilise des pièces d'un Sol'Ex, et une fente GEN2 de 14, 20, 26 et 32 µm avec trou de 25 µm complète l'ensemble.\u003c\/p\u003e","products":[{"product_id":"shelyak-es0033","title":"Shelyak Optical kit for Star'Ex LR spectroscope - IR complement","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eExtends Star'Ex LR spectroscope range to 650 nm – 1000 nm\u003c\/li\u003e\n\u003cli\u003eAchieves a spectral resolution of R=650 with a 23-micron slit\u003c\/li\u003e\n\u003cli\u003eDesigned for DIY 3D-printed spectroscope projects\u003c\/li\u003e\n\u003cli\u003eFeatures 80mm focal length collimator and objective lenses\u003c\/li\u003e\n\u003cli\u003eMaintains a 1:1 internal reduction ratio for simple imaging\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\u003eOptical kit for Star'Ex LR spectroscope - IR complement\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the essential components to modify a Star'Ex Low Resolution (LR) spectroscope for near-infrared observation, extending its range from the visible spectrum out to 1000 nm. With a typical resolution of R=650 using a 23-micron slit, this kit enables the study of faint object spectra with a DIY, 3D-printable instrument. The design is built around an 80mm focal length collimator and objective, ensuring a direct 1:1 imaging ratio onto your sensor.\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\u003eExtend Your Star'Ex LR into the Infrared up to 1000nm\u003c\/h3\u003e\n\u003cp\u003eThis kit is specifically designed as the infrared (IR) complement for the Star'Ex LR project. While the base Star'Ex operates in the visible range from 400 nm to 700 nm, these optics push your instrument's capabilities into the near-IR, covering a wavelength range of 650 nm to 1000 nm. This allows you to analyze spectral features not visible to the human eye, such as those in carbon stars and other cool stellar classes.\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\u003eAchieve R=650 Resolution with an 80mm Optical Design\u003c\/h3\u003e\n\u003cp\u003eThe system is engineered to deliver a spectral resolution of R=650 at 650 nm when paired with a 23-micron slit. This level of detail is ideal for classifying stellar types and identifying major emission and absorption lines in faint targets like nebulae and galaxies. The optical train uses an 80mm focal length for both the collimator and objective lenses, a design choice that simplifies the system and provides a clean, direct image.\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\u003eDIY Spectroscope: A 3D-Printed Project with 1:1 Optics\u003c\/h3\u003e\n\u003cp\u003eThis is an optical component kit for a do-it-yourself project, not a complete spectroscope. You will need to provide the 3D-printed housing and mechanical components, with files readily available from projects by Christian Buil. The kit's 1:1 internal reduction ratio means there is no change in image scale through the optics, simplifying focus and image acquisition. Please note that this kit contains only the optical elements; the 3D-printed parts, adapters, and cameras must be sourced separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the Star'Ex LR IR Complement Optical Kit for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is an add-on optical kit that modifies a DIY Star'Ex Low Resolution spectroscope, extending its operational wavelength from the standard visible range (400-700 nm) into the near-infrared (650-1000 nm). It allows amateur astronomers to study the spectra of celestial objects in a different light band.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build a complete Star'Ex LR IR spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical components\u003c\/strong\u003e. To build a functional spectroscope, you must provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 3D-printed body and mechanical parts (files are available online from the Star'Ex project).\u003c\/li\u003e\n\u003cli\u003eAn imaging camera and a guiding camera.\u003c\/li\u003e\n\u003cli\u003eAdapters to connect the spectroscope to your telescope and cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does a resolution of R=650 allow me to observe with the Star'Ex LR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA resolution of R=650 is considered low-resolution spectroscopy, but it is powerful enough for many amateur projects. It allows you to clearly identify the main spectral types of stars (O, B, A, F, G, K, M), observe the prominent emission lines in nebulae like the Balmer series, and measure the redshift of bright galaxies and quasars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Star'Ex LR IR kit to observe the Hydrogen-alpha line in a nebula like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Hydrogen-alpha emission line is at 656.3 nm, which falls squarely within this kit's 650 nm to 1000 nm operational range. This makes it well-suited for studying H-alpha emissions in star-forming regions like the Orion Nebula (M42) and other emission nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 650 nm to 1000 nm range help when observing a carbon star in my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCarbon stars are very cool and emit a significant portion of their light in the near-infrared. Using this kit with your 8\" SCT, you can capture the deep absorption bands of molecules like cyanogen (CN) and carbon (C2) that are characteristic of these stars and are most prominent in the 650 nm to 1000 nm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Star'Ex IR kit a standalone spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it is not. This is an optical kit containing lenses, gratings, and other elements. It is intended for those undertaking the DIY project of building a Star'Ex spectroscope using 3D printing or other custom fabrication methods. You must build the instrument's body and supply all other non-optical components.\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\u003eSpectral Resolution\u003c\/td\u003e\n\u003ctd\u003eR = 650 typical (@650 nm with a 23-micron slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInfrared Wavelength Range\u003c\/td\u003e\n\u003ctd\u003e650 nm – 1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisible Wavelength Range (Base Unit)\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimator Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/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":52943032353053,"sku":"SHK-ES0033","price":713.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-LR-spectroscope-IR-complement-1_36e29a9d-3d79-4486-b205-a08c7e440228.jpg?v=1789615964"},{"product_id":"shelyak-es0037","title":"Shelyak Optical kit for Star'Ex HR spectrograph - additional kit for Sol'Ex","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables spectral resolution up to R=30,000\u003c\/li\u003e\n\u003cli\u003eCovers the visible spectrum from 400 nm to 700 nm\u003c\/li\u003e\n\u003cli\u003eDesigned for DIY 3D-printed spectrograph projects\u003c\/li\u003e\n\u003cli\u003eInternal optical reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eIncludes the GEN 2 slit for precise results\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\u003eOptical kit for Star'Ex HR spectrograph - additional kit for Sol'Ex\u003c\/h2\u003e\n\u003cp\u003eThis Optical kit for Star'Ex HR spectrograph provides the core components to build a powerful scientific instrument capable of a spectral resolution up to R=30,000. It is designed to operate across the visible spectrum, from 400 nm to 700 nm, and features an internal reduction ratio of 125:80, optimized for popular imaging cameras.\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\u003eHigh-Resolution Spectroscopy: Up to R=30,000 Across the 400-700 nm Range\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex HR optical kit enables the detailed analysis of bright stellar and nebular spectra. A resolution of up to R=30,000 allows you to resolve fine details in spectral lines that are invisible to lower-resolution instruments, making it possible to study Doppler shifts, line broadening, and the complex chemistry of stars. The operational range of 400 nm to 700 nm ensures full coverage of the visible light spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 125:80 Reduction Ratio for Your 3D-Printed Spectrograph\u003c\/h3\u003e\n\u003cp\u003eThis kit is intended for the advanced amateur who wishes to build their own instrument through 3D printing. It contains only the essential optical elements, including the new GEN 2 slit, but does not include any mechanical or 3D-printed parts. The design's 125:80 internal reduction ratio is engineered to match the optical system to common sensor sizes, ensuring efficient light collection. You must source the 3D printing files (available from Christian Buil's website) and all mechanical components separately.\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\u003eStar'Ex HR vs. Sol'Ex: From Solar Studies to High-Resolution Stellar Work\u003c\/h3\u003e\n\u003cp\u003eWhile the Sol'Ex project is optimized for studying a single, bright, extended source—the Sun—the Star'Ex HR adapts the concept for high-resolution spectroscopy of point-like or dimmer deep-sky objects. The Star'Ex HR is the ideal solution for moving beyond solar observation to analyze the spectra of individual stars, planetary nebulae, and other bright emission targets. This optical kit provides the foundation for that transition, enabling more advanced scientific investigations.\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 else do I need to build a complete Star'Ex HR spectrograph with this kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical components\u003c\/strong\u003e. To complete the project, you will need to source the 3D-printed body, all necessary screws and hardware, a guiding camera, and a science camera. The 3D printing files are available for free on Christian Buil's website, and mechanical kits are offered by third parties like Azur3dPrint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I observe with the Star'Ex HR's R=30,000 resolution?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA spectral resolution of R=30,000 allows for detailed professional-amateur studies. You can clearly resolve the Sodium D lines (D1 and D2) in stellar spectra, measure the rotational velocity of stars through Doppler broadening, or observe Zeeman splitting in the spectral lines of stars with strong magnetic fields. It reveals a level of detail far beyond what is possible with simple grating spectrographs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Star'Ex HR optical kit for solar observing like the Sol'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Star'Ex HR is specifically designed for nighttime targets like stars and nebulae. It is not configured for solar observation, which requires the specific setup and safety features of the Sol'Ex project. This kit is intended to build a separate, high-resolution instrument for stellar spectroscopy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Star'Ex HR perform on a bright Be star like Gamma Cassiopeiae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star'Ex HR is exceptionally well-suited for targets like Gamma Cassiopeiae. Its high resolution would allow you to clearly resolve the double-peaked H-alpha emission line profile, which is characteristic of the gaseous disk surrounding Be stars. Monitoring changes in this profile over time is a key area of pro-am research that this instrument makes accessible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Star'Ex HR with an 8\" f\/10 SCT to study the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, an 8\" SCT is a great match for the Star'Ex HR. When pointed at the Trapezium region of the Orion Nebula (M42), you could use the spectrograph to separate the distinct emission lines of Hydrogen (H-alpha, H-beta) and Oxygen ([OIII]). The high resolution would allow you to study the velocity structure and turbulence within the nebula's brightest regions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere can I find the 3D printing files for the Star'Ex HR spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe complete set of 3D printing files (STL format) and assembly instructions for the Star'Ex HR project are maintained by its creator, Christian Buil. They can be downloaded directly from his personal website, which is the official source for the project.\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\u003eSpectral Resolution (R)\u003c\/td\u003e\n\u003ctd\u003eR = 700 to R = 30,000 depending on the slit width chosen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e125 : 80\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\"\u003eOptical Kit Components\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eThis kit contains only the required optical elements, including mirrors, lenses, grating, and the GEN 2 slit. 3D-printed parts, mechanical hardware, adapters, and cameras are not included and must be sourced separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/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":52943033663773,"sku":"SHK-ES0037","price":247.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-HR-spectrograph-additional-kit-for-Sol-Ex-1_84812268-151f-48c0-8e26-67bf3edd436d.jpg?v=1789615996"},{"product_id":"shelyak-es0038","title":"Shelyak Optical kit for Star'Ex HR spectrograph - complete set","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAchieve spectral resolutions from R=700 up to R=30,000\u003c\/li\u003e\n\u003cli\u003eCovers the visible spectrum with a 400 nm to 700 nm wavelength range\u003c\/li\u003e\n\u003cli\u003eDesigned as the optical core for a DIY 3D-printed spectrograph\u003c\/li\u003e\n\u003cli\u003eFeatures an internal focal reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eIncludes the latest GEN 2 slit for improved results\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\u003eOptical kit for Star'Ex HR spectrograph - complete set\u003c\/h2\u003e\n\u003cp\u003eThis optical kit for the Star'Ex HR spectrograph provides the core components for a high-resolution, 3D-printed instrument capable of achieving a spectral resolution from R=700 to R=30,000. It operates across the visible spectrum from 400 nm to 700 nm and features an internal reduction ratio of 125:80, allowing you to capture detailed spectral profiles of stars, nebulae, and other bright celestial objects.\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\u003eBuild the R=30,000 Star'Ex HR Spectrograph\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential optical elements to construct your own Star'Ex High Resolution (HR) spectrograph, a project designed by Christian Buil. It enables the detailed study of stellar spectra, revealing chemical compositions and radial velocities with a precision determined by your choice of slit width, reaching up to an impressive R=30,000.\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\u003eVariable Spectral Resolution from R=700 to R=30,000\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex HR's primary strength is its adaptability. By swapping slits, you can adjust the spectral resolution from R=700 for quick surveys of fainter objects to an extremely high R=30,000 for resolving fine details in the spectral lines of bright stars. The operational wavelength range of 400 nm to 700 nm ensures full coverage of the visible spectrum, from deep violet to red.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 125:80 Ratio Foundation for Your 3D-Printed Spectrograph\u003c\/h3\u003e\n\u003cp\u003eEngineered as the heart of a DIY project, this kit is fully compatible with the 3D printing files available on Christian Buil’s website and mechanical kits from Azur3dPrint. The internal 125:80 reduction ratio is a key design parameter for matching your telescope's focal ratio to your imaging camera. Please note this is an opticals-only kit; it does not include any 3D-printed parts, mechanical hardware, adapters, or cameras.\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 Star'Ex HR Optical Kit used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit provides all the necessary optical components to build a Star'Ex High Resolution (HR) spectrograph. This instrument is used to analyze the light from celestial objects like stars and nebulae, splitting it into a spectrum to study their chemical composition, temperature, and motion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build the complete Star'Ex HR spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is an \u003cstrong\u003eopticals-only kit\u003c\/strong\u003e. To complete the project, you will need to source or fabricate the following items separately:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Body:\u003c\/strong\u003e Files are available from Christian Buil's website.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Parts:\u003c\/strong\u003e Screws and other hardware, potentially available in kits from vendors like Azur3dPrint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapters:\u003c\/strong\u003e To connect the spectrograph to your specific telescope and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging and Guiding Cameras:\u003c\/strong\u003e A main camera for capturing the spectrum and potentially a second for guiding.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Star'Ex HR achieve a resolution up to R=30,000?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe spectral resolution (R) is directly dependent on the width of the entrance slit. The Star'Ex HR design allows you to use different slits. A very narrow slit is used to achieve the highest resolution of \u003cstrong\u003eR=30,000\u003c\/strong\u003e, which allows for extremely fine detail in the spectrum, though it requires a brighter target and good seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat details can I see in the spectrum of a star like Vega (Alpha Lyrae) with the Star'Ex HR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith the Star'Ex HR at high resolution, you can easily resolve the deep, broad absorption lines of the Balmer series (Hydrogen-alpha, beta, gamma) in Vega's spectrum. At the highest resolutions, you may also be able to detect much finer metallic lines and study the precise profile of the hydrogen lines to understand the star's atmospheric properties.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Star'Ex HR kit work with my 8\" f\/10 Schmidt-Cassegrain telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Star'Ex HR is well-suited for common telescopes like an 8\" f\/10 SCT. The spectrograph's internal \u003cstrong\u003e125:80 reduction ratio\u003c\/strong\u003e helps to optimize the focal ratio for the camera sensor, which is beneficial when starting with a longer f-ratio telescope. You will need to ensure you have the correct adapters to physically connect the spectrograph to your telescope's visual back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 400 nm to 700 nm wavelength range of the Star'Ex HR cover?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis range covers the entire visible light spectrum that the human eye can see. It allows you to study many of the most important spectral features, including:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha (656 nm) and Hydrogen-beta (486 nm)\u003c\/strong\u003e lines in nebulae and stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium D lines (589 nm)\u003c\/strong\u003e, which are prominent in stars like our Sun.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium H \u0026amp; K lines (~393-397 nm)\u003c\/strong\u003e at the very edge of the violet range.\u003c\/li\u003e\n\u003c\/ul\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\u003eSpectral Resolution\u003c\/td\u003e\n\u003ctd\u003eR = 700 to R = 30,000 (depending on slit width)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e125 : 80\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\"\u003eComplete Optical Element Set for Star'Ex HR\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eIncludes all mirrors, lenses, grating, and slit required for the project.\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:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/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":52943033925917,"sku":"SHK-ES0038","price":752.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-HR-spectrograph-complete-set-1_47c1963a-bc6f-4343-8132-6ed7439acecf.jpg?v=1789616005"},{"product_id":"shelyak-es0039","title":"Shelyak Optical kit for Star'Ex LR spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBuild a complete Star'Ex Low Resolution spectroscope\u003c\/li\u003e\n\u003cli\u003eAchieves a typical resolution of R=650 at 650 nm\u003c\/li\u003e\n\u003cli\u003eDesigned for the visible spectrum from 400 nm to 700 nm\u003c\/li\u003e\n\u003cli\u003eFeatures an 80 mm focal length collimator and objective\u003c\/li\u003e\n\u003cli\u003e1:1 internal reduction ratio simplifies 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\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\u003eOptical kit for Star'Ex LR spectroscope\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the core components to build your own Star'Ex Low Resolution spectroscope, an instrument capable of a resolution of R=650 for analyzing faint deep-sky objects across the 400 nm to 700 nm visible spectrum. Based on a 1:1 internal ratio with an 80 mm focal length for both the collimator and objective, this kit is the starting point for a powerful DIY scientific instrument.\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\u003eBuild Your Own Spectroscope: An R=650 Faint Object Instrument\u003c\/h3\u003e\n\u003cp\u003eDesigned for the amateur astronomer ready for a rewarding project, this kit enables the construction of a spectroscope optimized for faint targets like nebulae, galaxies, and distant stars. With a resolving power of R=650, you can capture distinct spectral features, allowing for scientific analysis from a backyard observatory. The design is fully compatible with the 3D printing files developed by Christian Buil, creating a clear and proven path from components to a functional instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 400-700 nm Visible Spectrum Optical Path\u003c\/h3\u003e\n\u003cp\u003eThis kit is configured for spectroscopy in the visible range, from the violet edge at 400 nm to deep red at 700 nm. The included GEN 2 slit ensures precise light injection into the optical path. This wavelength range covers critical emission and absorption lines used to classify stars and analyze the composition of nebulae.\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\u003eAn 80mm Focal Length System: What You Need to Complete It\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex optical design uses an 80 mm focal length for both the collimator and objective, creating a simple and efficient 1:1 system. This optical kit contains only these core optical elements. To complete the spectroscope, you must source all other components separately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main body of the spectroscope must be 3D printed using the files available on Christian Buil’s website.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Hardware:\u003c\/strong\u003e Fasteners, adapters, and other mechanical components, such as those offered by Azur3dPrint, are required for assembly.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras:\u003c\/strong\u003e You will need to provide your own science camera for capturing spectra and potentially a separate guide camera.\n\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 included in the Star'Ex LR optical kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical elements\u003c\/strong\u003e required to build a Star'Ex LR spectroscope. It does not include the 3D-printed housing, mechanical screws, camera adapters, or any cameras. You are purchasing the specialized lenses, gratings, and slit needed for the project.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of resolution can I expect with the Star'Ex LR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star'Ex LR is designed to achieve a typical resolution of \u003cstrong\u003eR=650\u003c\/strong\u003e at 650 nm when using a 23-micron slit. This is considered low-to-medium resolution, ideal for capturing the spectra of faint objects where collecting maximum light is a priority.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build a complete Star'Ex LR spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo complete your spectroscope, you will need to provide the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 3D-printed body and components, using files from Christian Buil's website.\u003c\/li\u003e\n\u003cli\u003eA mechanical kit with all necessary screws and hardware (e.g., from Azur3dPrint).\u003c\/li\u003e\n\u003cli\u003eA telescope adapter to connect the Star'Ex to your telescope.\u003c\/li\u003e\n\u003cli\u003eA science camera for recording the spectrum.\u003c\/li\u003e\n\u003cli\u003e(Optional) A guiding camera and module for long exposures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Star'Ex LR perform on a bright nebula like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star'Ex LR is well-suited for targets like the Orion Nebula (M42). Its R=650 resolution is sufficient to clearly separate the main emission lines, such as Hydrogen-alpha, Hydrogen-beta, and the two Oxygen-III lines, allowing you to analyze the physical conditions within the nebula.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Star'Ex LR to study the spectrum of a galaxy like Andromeda (M31) with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but it will be challenging. While the Star'Ex LR is designed for faint objects, a galaxy's light is spread out, making its surface brightness very low. You would need to target the bright core of M31 and use long exposures. The resulting spectrum will be continuous, showing the combined light of billions of stars, and you may be able to detect redshift with careful measurement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Star'Ex LR kit suitable for infrared (IR) spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this specific kit is optimized for the visible spectrum (400 nm - 700 nm). Shelyak offers a separate, complementary optical kit to modify the Star'Ex LR for near-infrared (IR) observations from 650 nm to 1000 nm.\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\u003eResolution (@650 nm)\u003c\/td\u003e\n\u003ctd\u003eR = 650 typical with a 23-micron slit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm (Visible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimator Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 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\"\u003eStar'Ex LR Spectroscope Optical Element Set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eThis kit contains only the optical components. 3D-printed parts are not included.\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:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/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":52943034155293,"sku":"SHK-ES0039","price":840.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-LR-spectroscope-1_d1bfdc12-c43a-4de1-b63d-7ba51e81c514.jpg?v=1789616013"},{"product_id":"shelyak-se0288","title":"Shelyak Star’Ex 14-20-26-32 µm slit + 25 µm hole (GEN2)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFour selectable slit widths: 14 µm, 20 µm, 26 µm, and 32 µm\u003c\/li\u003e\n\u003cli\u003eCentral 25 µm pinhole for alignment\u003c\/li\u003e\n\u003cli\u003e4mm slit length for extended objects\u003c\/li\u003e\n\u003cli\u003e16mm x 16mm fused silica substrate\u003c\/li\u003e\n\u003cli\u003e2mm substrate thickness for durability\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\u003eStar’Ex 14-20-26-32 µm slit + 25 µm hole (GEN2)\u003c\/h2\u003e\n\u003cp\u003eThe Star’Ex GEN2 4-position reflective slit provides four distinct slit widths—14 µm, 20 µm, 26 µm, and 32 µm—engraved on a 16mm square substrate using high-precision photolithography. A central 25 µm pinhole acts as an artificial star for easy setup, and the entire 2mm thick component is made from robust fused silica for extended spectral transparency down to 375 nanometers. Each 4mm long slit is widened by a factor of 10 at its end to facilitate advanced spectrophotometric calibration.\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\u003eFour Slit Options from 14 µm to 32 µm for Versatile Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThis second-generation slit offers four distinct apertures arranged in a square, allowing you to match the spectrograph's resolution to your target and seeing conditions. The narrow 14 µm slit is ideal for achieving very high spectral resolution on bright targets with a small telescope. In contrast, the wider 32 µm slit is better suited for low-resolution work or capturing faint signal with larger instruments, such as a 300 mm telescope, where maximizing light input is critical.\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\u003e2mm Fused Silica Construction with UV Transparency\u003c\/h3\u003e\n\u003cp\u003eThe substrate is a 2mm thick, 16mm square blade of fused silica (synthetic quartz), chosen for its exceptional durability and broad spectral transmission. This material is transparent deep into the ultraviolet, offering a modest but useful gain around 375 nanometers even with the standard Star'Ex optics. The 2mm thickness makes the slit robust against mishandling and allows both sides to be cleaned easily with a dampened cotton swab.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated 25 µm Pinhole: An Artificial Star for Easy Benchtop Setup\u003c\/h3\u003e\n\u003cp\u003eA major innovation of the GEN2 design is the central 25 µm diameter hole. This pinhole acts as a perfect artificial star, allowing you to fully align and focus your spectrograph on a workbench without needing a telescope or a clear night sky. This feature dramatically simplifies the initial setup and calibration process, ensuring your instrument is perfectly configured before you attach it to the telescope.\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\u003e4mm Length and Widened Ends for Advanced Spectrophotometry\u003c\/h3\u003e\n\u003cp\u003eEach slit is 4mm long, enabling you to capture spectra from extended objects like nebulae or comets. Furthermore, the final 0.5mm of each slit is widened by a factor of 10. This unique design provides critical data on atmospheric turbulence and instrument performance, and it is essential for acquiring the spectrophotometric data needed to calibrate your spectra in absolute flux values.\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 are the different slit widths on the Star’Ex GEN2 slit for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe four widths allow you to optimize your spectrograph for different goals.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e14 µm \u0026amp; 20 µm:\u003c\/strong\u003e Best for high-resolution spectroscopy on bright stars where fine spectral detail is the priority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e26 µm \u0026amp; 32 µm:\u003c\/strong\u003e Ideal for lower-resolution work on fainter objects or with larger telescopes, as they allow more light to enter the spectrograph.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 25 µm central hole on the Star'Ex GEN2 slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e25 µm central hole\u003c\/strong\u003e serves as an artificial star. It allows you to perform a complete optical setup and alignment of your spectrograph on a workbench with a simple light source, without needing to attach it to a telescope. This makes initial configuration significantly easier and more precise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I choose between the 14 µm and 32 µm slits for a 300 mm telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a 300 mm telescope, the \u003cstrong\u003e32 µm slit\u003c\/strong\u003e is generally the better choice. Its wider aperture is better matched to the typical seeing conditions and image scale of a larger instrument, allowing more light from your target to pass into the spectrograph. The 14 µm slit would be extremely difficult to use under average seeing and would discard most of the starlight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the Star'Ex GEN2 slit made of and why does it matter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit is made from a \u003cstrong\u003e2mm thick plate of fused silica\u003c\/strong\u003e. This material offers two key advantages:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e It is mechanically robust and easy to clean without risk of damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Transparency:\u003c\/strong\u003e It transmits light well into the ultraviolet portion of the spectrum (down to ~375 nm), allowing for astrophysical studies in wavelengths that are inaccessible with standard glass.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Star’Ex GEN2 slit come with a holder?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the slit is delivered without its 3D-printed support. You will need to either 3D print the support part yourself using the plans provided by the manufacturer or design a custom holder for your specific instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 4mm slit length on the Star'Ex GEN2 to get a spectrum of the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The long \u003cstrong\u003e4mm slit length\u003c\/strong\u003e is specifically designed for capturing spectra of objects with large angular sizes, such as the Orion Nebula (M42) or comets. This allows you to study how the spectral characteristics change across different regions of the nebula in a single exposure.\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\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e4-Position Reflective Slit (GEN2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Widths\u003c\/td\u003e\n\u003ctd\u003e14 µm, 20 µm, 26 µm, 32 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Pinhole Diameter\u003c\/td\u003e\n\u003ctd\u003e25 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Length\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Material\u003c\/td\u003e\n\u003ctd\u003eFused Silica (Synthetic Quartz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Dimensions\u003c\/td\u003e\n\u003ctd\u003e16 mm x 16 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eAnti-reflective (one side), Opaque Chromium (slit side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eStar’Ex Spectrographs, custom instruments\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\"\u003eStar’Ex GEN2 4-Position Slit\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":52943055159581,"sku":"SHK-SE0288","price":127.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Star-Ex-14-20-26-32-m-slit-25-m-hole-GEN2-1_4f93cd48-7203-4178-9c33-d324015bfd63.jpg?v=1789616548"}],"url":"https:\/\/davidastro.com\/fr\/collections\/shelyak-star-ex-spectrograph-kits.oembed","provider":"David Astro","version":"1.0","type":"link"}