{"title":"Filtres à réseau Shelyak Star Analyser","description":"\u003cp\u003eLes Shelyak Star Analyser sont des réseaux de diffraction en transmission montés dans une cellule de filtre standard 1.25\". Placés devant une caméra, ils étalent la lumière de chaque étoile en un spectre à côté de son image, une première étape simple pour classer les étoiles ou repérer les raies d'émission des novae et nébuleuses.\u003c\/p\u003e\u003cp\u003eLe Star Analyser 100 donne un spectre compact et le Star Analyser 200 double la dispersion. Accessoires : bague allonge, kit de montage pour Star Analyser 200 et prisme de 3.8°.\u003c\/p\u003e","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-spacer-for-star-analyser","title":"Entretoise Shelyak pour analyseur d'étoiles","description":"\u003c!-- more --\u003e \u003cp\u003e\u003cspan\u003eLa distance minimale recommandée (en mm entre le capteur et l'extrémité du nez où se visse le Star Analyzer 100) est de 4x la taille des pixels de la caméra en microns. Si vous trouvez que la distance pour votre configuration est inférieure à la valeur minimale, nous vous recommandons d'acheter suffisamment d'entretoises pour amener la distance au-dessus du minimum.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e Chaque entretoise ajoute un réglage de 7 à 10 mm.\u003c\/p\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968071037213,"sku":"SHK-BA0014","price":47.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/BA0014-Spacer-T201x150_13__54747.1671743305.1280.1280.png?v=1684348656"},{"product_id":"shelyak-el0166","title":"Shelyak Star Analyser 200 Mounting Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSecurely houses the Star Analyser 200 grating (sold separately)\u003c\/li\u003e\n\u003cli\u003eEnables easy integration into a standard 1.25\" or 2\" optical train\u003c\/li\u003e\n\u003cli\u003eEssential for using the SA-200 grating with filter wheels or camera nosepieces\u003c\/li\u003e\n\u003cli\u003eProvides a stable, correctly aligned mount for consistent results\u003c\/li\u003e\n\u003cli\u003eProtects the delicate diffraction grating from handling and debris\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eStar Analyser 200 Mounting Kit\u003c\/h2\u003e\n\u003cp\u003eThis mounting kit provides the essential housing for the Star Analyser 200 diffraction grating. It is designed to securely hold the bare SA-200 grating, allowing you to integrate it seamlessly into your existing imaging train. By converting the standalone grating into a threaded cell, this kit enables its use in standard filter wheels, camera nosepieces, and other accessories, transforming it into a functional and protected spectroscopic tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSecure Your Star Analyser 200 for Spectroscopic Imaging\u003c\/h3\u003e\n\u003cp\u003eIf you have purchased the Star Analyser 200 grating as a standalone component, this mounting kit is the critical next step for putting it to use. The kit provides a precisely machined housing that protects the delicate grating while ensuring it is held flat and perpendicular to the optical axis. This stability is crucial for acquiring clean, high-resolution stellar spectra without flexure or misalignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Star Analyser 200 mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star Analyser 200 is often sold as a bare diffraction grating. This mounting kit provides a protective housing for that grating, converting it into a standard threaded cell. This allows you to mount the spectroscope in a filter wheel, eyepiece barrel, or camera nosepiece just like a standard filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this mounting kit for my Star Analyser 200?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf you purchased the Star Analyser 200 as a standalone grating without any housing, then yes, you will need this kit to use it with your telescope and camera. If you purchased a version of the Star Analyser that was already mounted in a cell, you do not need this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the mounting kit help me get a spectrum of a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy securing the Star Analyser 200 grating in your optical path, this kit allows you to capture the dispersed light from a bright star. When you image Vega through the mounted grating, its light is spread into a spectrum, revealing absorption lines like the Balmer series of hydrogen, which are characteristic fingerprints of the star's composition and temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Star Analyser 200 mounting kit compatible with a filter wheel on my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is one of its primary functions. The mounting kit is designed to create a cell with standard filter threads, allowing you to install the Star Analyser 200 into an empty slot in your filter wheel. This makes it easy to switch between standard imaging and spectroscopy during an observing session with your Schmidt-Cassegrain or other telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the mounting kit include the Star Analyser 200 grating itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this product is only the mounting kit (the housing). The Star Analyser 200 diffraction grating must be purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat tools are needed to install the grating into the Star Analyser 200 mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is typically straightforward and requires minimal tools, often just a retaining ring spanner or a similar tool to secure the grating inside the cell. Always handle the grating by its edges to avoid touching the optical surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecifications\u003c\/td\u003e\n\u003ctd\u003eNo specifications available for this product.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Star_Analyser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943029764381,"sku":"SHK-EL0166","price":63.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Star-Analyser-mounting-kit-1_8663a2dc-6413-493e-b61c-05045f0312d8.jpg?v=1789615891"},{"product_id":"shelyak-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\/collections\/shelyak-star-analyser-grating-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}