{"product_id":"lhires-iii-spectrograph","title":"Lhires III Spectrograph","description":"\u003ch4\u003eAn instrument of reference\u003c\/h4\u003e\n\u003cp\u003eThe Lhires III spectroscope is Shelyak Instruments’ “historic” instrument. Designed from the CNRS Astrophysics School in 2003 for the observation of Be stars, it has since found a wide range of applications.\u003c\/p\u003e\n\u003ch4\u003eResolution \u0026amp; spectral range\u003c\/h4\u003e\n\u003cp\u003eWith a resolving power of R=18,000, it provides access to Doppler velocity measurements, as well as incredible detail in the profile of a line.\u003cbr\u003eThe network module supplied as standard has 2400 lines\/mm, giving full resolution. It can be replaced by an \u003ca href=\"https:\/\/www.shelyak.com\/produit\/test-reseau-lhires-iii-choix-multiple\/?lang=en\"\u003eoptional module\u003c\/a\u003e, to access other resolutions – making the Lhires III a versatile instrument. You can adapt your resolution to your project. Weaker objects are then accessible: Novae, bright comets…\u003c\/p\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" class=\"wp-image-275 aligncenter entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/SE0006-Module-reseau-1200-T168x150-148.png\" alt=\"\" width=\"348\" height=\"311\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/SE0006-Module-reseau-1200-T168x150-148.png\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe spectral range covered is limited (of the order of ten nanometers, due to the need for high resolution), but you can select any wavelength in the visible range (400-750nm), thanks to a micrometer.\u003c\/p\u003e\n\u003cp\u003eNumerous educational projects based on the Doppler effect are now possible, such as the \u003ca href=\"https:\/\/www.shelyak.com\/planets-rotation\/?lang=en\"\u003erotation of Jupiter or Saturn\u003c\/a\u003e.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" class=\"wp-image-1070 entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/20060626jupiter_c11l2400st7e-900_img_zoom.jpg\" alt=\"\" width=\"443\" height=\"288\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/20060626jupiter_c11l2400st7e-900_img_zoom.jpg\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003eExample of a spectrum of Jupiter,\u003c\/p\u003e\n\u003cp\u003eshowing the planet’s rotation\u003c\/p\u003e\n\u003cp\u003e(inclination of the solar lines).\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch4\u003eAperture\u003c\/h4\u003e\n\u003cp\u003eThe F\/10 aperture makes it particularly well suited to Schmidt-Cassegrain telescopes. But it can also be mounted on other, more open instruments (by adding a Barlow lens).\u003c\/p\u003e\n\u003ch4\u003eGuiding system\u003c\/h4\u003e\n\u003cp\u003eThanks to its mirror slit, the Lhires III enables the target star to be precisely positioned and held in the slit. A guiding camera (not supplied) enables the telescope’s movements to be controlled (autoguiding), ensuring optimum observation.\u003c\/p\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" class=\"wp-image-1072 aligncenter entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/wc-jup2.jpg\" alt=\"\" width=\"272\" height=\"181\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/wc-jup2.jpg\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003ch4\u003eInterchangeable slit\u003c\/h4\u003e\n\u003cp\u003eThe interchangeable slit supplied as standard (15-19-23-35µm) means that the instrument can be adapted to most observations, giving priority to resolution or brightness if required. Other slits are also available as options (\u003ca href=\"https:\/\/www.shelyak.com\/produit\/se0122-fentes-19-50-75-100\/?lang=en\"\u003ewide slits\u003c\/a\u003e, \u003ca href=\"https:\/\/www.shelyak.com\/produit\/se0194a-fente-photometrique\/?lang=en\"\u003ephotometric slits\u003c\/a\u003e), to further extend the possibilities.\u003c\/p\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" class=\"size-medium wp-image-1601 aligncenter entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w-300x278.png\" alt=\"\" width=\"300\" height=\"278\" data-lazy-srcset=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w-300x278.png 300w, https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w-510x472.png 510w, https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w.png 576w\" data-lazy-sizes=\"(max-width: 300px) 100vw, 300px\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w-300x278.png\" data-ll-status=\"loaded\" sizes=\"(max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w-300x278.png 300w, https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w-510x472.png 510w, https:\/\/www.shelyak.com\/wp-content\/uploads\/se0192-support-fente-lhiii-002_184_w.png 576w\"\u003e\u003c\/p\u003e\n\u003ch4\u003eMechanical interfaces\u003c\/h4\u003e\n\u003cp\u003eThe Lhires III is supplied with a standard interface for Schmidt-Cassegrain telescopes. If you wish to adapt it to a 2″ eyepiece holder, use the optional \u003ca\u003e2″ adapter\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" class=\"wp-image-2380 aligncenter entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/LhiresIII_SCT.jpg\" alt=\"\" width=\"333\" height=\"250\" data-lazy-srcset=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/LhiresIII_SCT.jpg 400w, https:\/\/www.shelyak.com\/wp-content\/uploads\/LhiresIII_SCT-300x225.jpg 300w\" data-lazy-sizes=\"(max-width: 333px) 100vw, 333px\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/LhiresIII_SCT.jpg\" data-ll-status=\"loaded\" sizes=\"(max-width: 333px) 100vw, 333px\" srcset=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/LhiresIII_SCT.jpg 400w, https:\/\/www.shelyak.com\/wp-content\/uploads\/LhiresIII_SCT-300x225.jpg 300w\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe CCD adaptor supplied as standard is suitable for \u003ca href=\"https:\/\/www.shelyak.com\/produit\/se0113-atik-314l-mono\/?lang=en\"\u003eATIK cameras\u003c\/a\u003e. (13mm mechanical backfocus). We offer a wide choice of adapter rings in our \u003ca href=\"https:\/\/www.shelyak.com\/?product_cat=bagues-fentes\"\u003eaccessories catalog.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe guiding camera is C-mount.\u003c\/p\u003e\n\u003ch4\u003eGoing further with Lhires III\u003c\/h4\u003e\n\u003cp\u003eIn addition to the astrophysical knowledge it can provide, the Lhires III is also a tool for collaboration between amateur and professional astronomers: studying Be-type stars, tracking variable stars, etc. Numerous scientific papers have been based on observations with a Lhires III.\u003c\/p\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" class=\"size-medium wp-image-938 alignleft entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-300x300.png\" alt=\"\" width=\"300\" height=\"300\" data-lazy-srcset=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-300x300.png 300w, https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-100x100.png 100w, https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-150x150.png 150w, https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau.png 400w\" data-lazy-sizes=\"(max-width: 300px) 100vw, 300px\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-300x300.png\" data-ll-status=\"loaded\" sizes=\"(max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-300x300.png 300w, https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-100x100.png 100w, https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau-150x150.png 150w, https:\/\/www.shelyak.com\/wp-content\/uploads\/Be_02_zetTau.png 400w\"\u003e\u003cimg decoding=\"async\" class=\"alignnone wp-image-2386 entered lazyloaded\" src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/RRLyr-HAlpha.gif\" alt=\"\" width=\"430\" height=\"313\" data-lazy-src=\"https:\/\/www.shelyak.com\/wp-content\/uploads\/RRLyr-HAlpha.gif\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe support of a large community\u003c\/h4\u003e\n\u003cp\u003eThe Lhires III is widely used around the world, and you can find many examples of use and advice on the Spectro-L discussion list: \u003ca href=\"https:\/\/groups.io\/g\/spectro-l\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ehttps:\/\/groups.io\/g\/spectro-l\u003c\/a\u003e or on the spectroscopy forum: \u003ca href=\"http:\/\/www.spectro-aras.com\/forum\/index.php\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eARAS\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan data-olk-copy-source=\"MessageBody\"\u003ePricing subject to change based upon Euro to USD conversion at time of purchase\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"Shelyak Instruments","offers":[{"title":"Default Title","offer_id":51264628719904,"sku":"ES0002","price":5022.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/image_cbd0ff57-7970-4384-b3d6-545914cd4170.jpg?v=1771988337","url":"https:\/\/firstlightastro.com\/products\/lhires-iii-spectrograph","provider":"First Light Astro","version":"1.0","type":"link"}