{"title":"Grating Filters \u0026 Spectrograph Kits","description":null,"products":[{"product_id":"shelyak-star-analyser-100","title":"Analyseur d'étoiles Shelyak 100","description":"\u003c!-- more --\u003e \u003cp\u003e\u003cspan\u003eLe Star Analyzer 100 est un réseau de diffraction en transmission 100 lignes\/mm à haut rendement, blazé au premier ordre. Il est monté dans une cellule filetée standard de 1,25 pouce de diamètre, pour être compatible avec la plupart des télescopes et accessoires.\u003c\/span\u003e\u003c\/p\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070807837,"sku":"SHK-PF0003","price":258.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PF0003-Star-Analyser_5__12858.1671742177.1280.1280.png?v=1684348653"},{"product_id":"shelyak-star-analyser-200","title":"Analyseur d'étoiles Shelyak 200","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cspan\u003eL'analyseur 200 est un réseau de diffraction en transmission 200 lignes\/mm à haut rendement, blazé au premier ordre. Il est monté dans une cellule filetée à profil bas standard de 1,25 pouce de diamètre, compatible avec la plupart des télescopes et accessoires ainsi que des roues à filtres minces.\u003c\/span\u003e\u003c\/p\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070971677,"sku":"SHK-PF0040","price":296.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/pf0040-sa200-f-t210x156_158__03510.1671742470.1280.1280.png?v=1684348655"},{"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-es0035","title":"Shelyak Optical kit for SUNSCAN spectroheliograph by STAROS Projects","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables construction of the STAROS Projects SUNSCAN spectroheliograph\u003c\/li\u003e\n\u003cli\u003eAllows solar imaging at user-selected wavelengths\u003c\/li\u003e\n\u003cli\u003eProvides the core optical components for the project\u003c\/li\u003e\n\u003cli\u003eCompleted instrument is controllable via smartphone or tablet\u003c\/li\u003e\n\u003cli\u003eDesigned for advanced DIY astronomy projects\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\u003eOptical kit for SUNSCAN spectroheliograph by STAROS Projects\u003c\/h2\u003e\n      \u003cp\u003eThis is the core optical kit for the innovative SUNSCAN spectroheliograph from STAROS Projects. It provides the essential optical elements required to construct a modern, stand-alone instrument capable of imaging the Sun in any wavelength you choose. Once assembled, the complete SUNSCAN system is designed to be controlled wirelessly through a dedicated smartphone or tablet application, bringing advanced solar analysis into the hands of the dedicated amateur.\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\u003eBuild a Custom-Wavelength Solar Spectroheliograph\u003c\/h3\u003e\n      \u003cp\u003eA spectroheliograph builds a monochromatic image of the Sun by scanning it, slit by slit, capturing only the light from a specific spectral line. This kit is the foundation of that capability, enabling you to assemble an instrument that goes beyond common H-alpha or Calcium-K filters to explore other interesting lines like Sodium D or Helium D3.\u003c\/p\u003e\n      \u003cp\u003eBy undertaking the SUNSCAN project, you can create a highly specialized solar telescope tailored to your specific research or imaging interests. The finished instrument allows you to see solar features like prominences, filaments, and plage with unique contrast depending on the wavelength selected.\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 Optical Foundation for Your SUNSCAN Project: What's Required\u003c\/h3\u003e\n      \u003cp\u003eThis product provides the specialized optical components only. It is intended for the dedicated hobbyist ready to take on a rewarding DIY project. To complete the SUNSCAN spectroheliograph, you will need to source several other components separately.\u003c\/p\u003e\n      \u003cp\u003ePlease be aware that this kit does not include the 3D-printed structural parts, focuser, imaging camera, Raspberry Pi 4 controller, tripod, or other complementary hardware. These items must be acquired independently to complete the instrument as designed by STAROS Projects.\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 exactly is in the SUNSCAN Optical Kit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis kit contains only the core optical elements required for the STAROS Projects SUNSCAN spectroheliograph. It is not a complete instrument. You will need to supply all mechanical parts, electronics, and hardware separately.\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 full SUNSCAN spectroheliograph?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eTo complete the project, you must source several items independently. Key components not included are:\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main body and structure of the instrument.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eElectronics:\u003c\/strong\u003e A Raspberry Pi 4 (RP4) for control, plus an imaging camera.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e A focuser, tripod, and various fasteners.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SUNSCAN project suitable for a beginner?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis is an advanced DIY project best suited for experienced astronomical instrument makers and solar imagers. It requires sourcing parts, 3D printing, and assembling electronic and optical components. Familiarity with spectrograph principles is highly recommended.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the completed SUNSCAN instrument controlled?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe SUNSCAN spectroheliograph is designed by STAROS Projects to be a stand-alone unit. It is controlled wirelessly via a dedicated application on a smartphone or tablet, which communicates with the onboard Raspberry Pi 4.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SUNSCAN to image in the H-alpha line?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The principle of the spectroheliograph is to allow imaging at any user-selected wavelength. You can configure the instrument to image in the hydrogen-alpha line (656.3 nm) as well as other spectral lines of interest, such as Calcium-K, Helium D3, or Sodium D lines.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhere can I find the plans for the 3D-printed parts for the SUNSCAN project?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe design for the SUNSCAN is an open-source project from STAROS Projects. You should refer to their official project page or community forums for the latest STL files and assembly instructions.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003eThis product is covered by the standard David Astro warranty. Please contact us for more details.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943032877341,"sku":"SHK-ES0035","price":748.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-SUNSCAN-spectroheliograph-by-STAROS-Projects-1_1ba110d8-fb41-4767-b3f2-7f55279e097e.jpg?v=1789615981"},{"product_id":"shelyak-es0036","title":"Shelyak Optical kit for Sol’Ex spectroheliograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBuild a high-resolution solar spectroheliograph\u003c\/li\u003e\n\u003cli\u003eAchieves 0.03 nm resolution at 650 nm\u003c\/li\u003e\n\u003cli\u003eTunable across the 400 nm to 700 nm visible spectrum\u003c\/li\u003e\n\u003cli\u003eInternal optical reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eBased on the open-source Sol'Ex project by Christian Buil\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 Sol’Ex spectroheliograph\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the core components to build your own Sol'Ex, an instrument capable of achieving an incredible 0.03 nm resolution for solar imaging. The system operates across the entire visible spectrum from 400 nm to 700 nm, utilizing an internal reduction ratio of 125:80 designed for the 3D-printed instrument body. With this kit, you can construct a spectroheliograph that reveals the Sun's chromosphere with contrast far exceeding that of standard commercial filters.\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\u003eUnlocking the Chromosphere with 0.03 nm Resolution\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of the Sol'Ex is its spectral resolving power. This kit enables a resolution of 0.03 nm (equivalent to 0.3 Ångströms), an extremely narrow bandpass that isolates specific spectral lines with exceptional purity. This allows you to produce high-contrast images of chromospheric features like filaments, prominences, and plage that are often washed out by broader, more common solar filters.\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 400 nm to 700 nm Window on Solar Activity\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed-wavelength filters, the Sol'Ex design allows you to image the Sun at any wavelength within the 400 nm to 700 nm range. You are not limited to just Hydrogen-alpha; you can capture images in Sodium (Na D), Helium (He D3), Hydrogen-beta, and more, revealing different layers and activity in the solar atmosphere. The instrument works as a spectroheliograph, scanning the solar disk and using the included software to reconstruct a detailed monochromatic 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\u003eA 125:80 Optical Core for the Sol'Ex and Star'Ex Projects\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential optics—slit, grating, lenses—to serve as the heart of your 3D-printed Sol'Ex. The 125:80 internal reduction ratio is specified for the build files developed by Christian Buil, ensuring compatibility. Please note that this is a DIY project; you must source the 3D-printed parts and other components like cameras and adapters separately. For those interested in stellar science, this same optical core can be converted into a high-resolution stellar spectrograph, Star'Ex, with a complementary optical kit.\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 Sol'Ex with this 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 components\u003c\/strong\u003e. To complete the Sol'Ex, you will need to source the 3D-printed housing parts (STL files are available on the Sol'Ex project website) and other hardware, including an imaging camera, a guiding camera, and telescope adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is required for the Sol'Ex spectroheliograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex is designed to be mounted on a small telescope. To see the entire solar disk in a single image scan, a telescope with a focal length of \u003cstrong\u003e450mm or less\u003c\/strong\u003e is recommended. Using a telescope with a longer focal length is possible and will yield more detailed images of specific regions on the Sun, but you will not capture the full disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Sol'Ex's 0.03 nm resolution compare to a standard H-alpha filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.03 nm (0.3 Å)\u003c\/strong\u003e resolution of the Sol'Ex is significantly narrower than most commercially available solar filters. For comparison, many high-end amateur H-alpha filters have a bandpass of 0.05 nm to 0.07 nm (0.5 Å to 0.7 Å). This narrower bandpass is what allows the Sol'Ex to produce images with superior contrast on fine chromospheric details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I image prominences in H-alpha with the Sol'Ex optical kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Once you build the Sol'Ex and tune it to the Hydrogen-alpha wavelength (656.3 nm), its high resolution and contrast are ideal for capturing detailed images of solar prominences against the dark sky, as well as filaments on the solar disk itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it difficult to process the images from the Sol'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex project includes dedicated software designed for automatic image processing. The instrument captures data by scanning the Sun, and the software then reconstructs the final, high-contrast monochromatic image from this data, making the process straightforward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I upgrade my Sol'Ex to a Star'Ex for stellar spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex is designed to be convertible into a stellar spectrograph called Star'Ex. This requires a few additional optical elements, which are available in a separate complementary kit (Star’Ex HR complementary kit). This allows you to use the same core instrument to analyze the spectra of stars.\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 at 650 nm\u003c\/td\u003e\n\u003ctd\u003e0.03 nm (with 10 micron 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\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":52943033106717,"sku":"SHK-ES0036","price":593.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Sol-Ex-spectroheliograph-1_3515680a-873c-40f7-b32c-8a320113d37f.jpg?v=1789615989"},{"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-op0094","title":"Shelyak Prism 3.8° for the Star Analyser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e3.8° prism angle precisely calculated for the Star Analyser\u003c\/li\u003e\n\u003cli\u003eImproves spectral resolution by approximately 20%\u003c\/li\u003e\n\u003cli\u003eAchieves a resolving power of R~130\u003c\/li\u003e\n\u003cli\u003eCorrects optical coma inherent in converging beam setups\u003c\/li\u003e\n\u003cli\u003eOptimized for advanced applications like nova and supernova characterization\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\u003ePrism 3.8° for the Star Analyser\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Prism 3.8° for the Star Analyser is an optical enhancement designed to increase its resolving power by approximately 20%. This accessory corrects for coma inherent in the Star Analyser's simple design, pushing its performance to a resolving power of R~130. By adding this 3.8° prism, you can extract more detailed spectral data from your existing 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\u003eCorrect Coma and Boost Resolution by 20% to R~130\u003c\/h3\u003e\n\u003cp\u003eThe Star Analyser's effectiveness comes from its simplicity—placing a diffraction grating directly into a telescope's converging light path. However, this introduces optical coma, which can soften spectral lines. The 3.8° Prism is specifically calculated to counteract this aberration, resulting in a sharper spectrum and an approximate 20% improvement in resolving power, achieving R~130.\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\u003eIs the 3.8° Prism Necessary for Your Spectroscopy?\u003c\/h3\u003e\n\u003cp\u003eThis prism is not a requirement for everyone. If you are using the Star Analyser to explore the basics of spectroscopy, the standard configuration is more than sufficient. However, if your goal is to push the instrument to its analytical limits for scientific contribution—such as characterizing the spectral evolution of novae or supernovae—this 3.8° prism is an essential upgrade.\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 main purpose of the Prism 3.8° for the Star Analyser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the 3.8° Prism is to improve the optical quality and resolution of spectra produced by a Star Analyser grating. It specifically corrects for \u003cstrong\u003ecoma\u003c\/strong\u003e, an aberration introduced when the grating is placed in a converging telescope beam, boosting resolution by about \u003cstrong\u003e20% to R~130\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 3.8° Prism for the Star Analyser improve resolution?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe prism works by pre-correcting the light path before it reaches the diffraction grating. Its \u003cstrong\u003e3.8° wedge angle\u003c\/strong\u003e is precisely calculated to cancel out the coma that the simple, in-beam placement of the Star Analyser would otherwise create. This results in sharper, better-defined spectral lines and therefore higher effective resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this 3.8° Prism if I'm just starting with spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this prism is generally not necessary for beginners. The standard Star Analyser is an excellent tool for learning and discovering spectroscopy. This 3.8° prism is an upgrade for users who want to push the Star Analyser to its maximum performance for more demanding applications, like pro-am collaborations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 3.8° Prism to study the spectrum of a bright supernova like SN 2023ixf?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application. Characterizing novae and supernovae is a key use case for this prism. The increased resolution to \u003cstrong\u003eR~130\u003c\/strong\u003e allows for better identification and monitoring of spectral features as the event evolves, providing more valuable scientific data than the Star Analyser could achieve on its own.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of optical aberration does the Prism 3.8° correct in my f\/8 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe prism is designed to correct for \u003cstrong\u003ecoma\u003c\/strong\u003e that is introduced by the Star Analyser itself, not the telescope. When you place the grating in the converging f\/8 light cone of your SCT, coma is created. The 3.8° Prism is engineered to minimize this specific aberration, leading to a cleaner spectrum regardless of your telescope's native optical quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 3.8° Prism for the Star Analyser change how I process my spectra?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe prism does not fundamentally change the data acquisition or processing workflow. You will still capture and calibrate your spectra using the same software (like Demetra). The primary difference will be in the final result: you will start with a sharper raw image, allowing for a more precise and higher-resolution final spectral profile.\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_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":52943034614045,"sku":"SHK-OP0094","price":113.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Prism-3-8-for-the-Star-Analyser-1_4033f785-10e6-4816-acc7-23ef1ad0c1cf.jpg?v=1789616029"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/grating-filters-and-kits.oembed","provider":"David Astro","version":"1.0","type":"link"}