{"product_id":"shelyak-se0116","title":"Shelyak Multiple Slit 15\/19\/23\/35 µm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFour Selectable Slit Widths: 15µm, 19µm, 23µm, 35µm\u003c\/li\u003e\n\u003cli\u003eReflective Slit Design for Maximum Throughput\u003c\/li\u003e\n\u003cli\u003eCompatible with Shelyak LISA \u0026amp; Lhires III Spectroscopes\u003c\/li\u003e\n\u003cli\u003eCan be used with Sol'Ex for Stellar Observation (Requires Guiding Module)\u003c\/li\u003e\n\u003cli\u003eRequires Matching Slit Holder for Operation\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\u003eShelyak Multiple Slit 15\/19\/23\/35 µm\u003c\/h2\u003e\n\u003cp\u003eThis Shelyak Multiple Slit provides four selectable reflective slit widths—15 µm, 19 µm, 23 µm, and 35 µm—for direct integration with LISA and Lhires III spectroscopes. The 4 positions allow you to precisely balance spectral resolution against light throughput, with the 15 µm slit offering the highest resolution for bright targets and the 35 µm slit maximizing signal for faint 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\u003eFour Slit Options: 15, 19, 23, and 35 µm\u003c\/h3\u003e\n\u003cp\u003eThe core of spectroscopy is the trade-off between resolution and light gathering. This 4-position slit allows you to optimize your instrument for any target. Use the narrow 15 µm slit to resolve fine details in the spectra of bright stars, or switch to the wide 35 µm slit to capture enough photons from a faint galaxy to register a usable signal.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 µm \u0026amp; 19 µm:\u003c\/strong\u003e Ideal for high-resolution work on bright stars, planetary nebulae, and other high-surface-brightness targets where separating close spectral lines is the primary goal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e23 µm \u0026amp; 35 µm:\u003c\/strong\u003e Best for faint targets like nebulae, comets, and galaxies. These wider slits increase light throughput at the cost of resolution, making them essential for low-signal situations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompatibility: For LISA, Lhires III, and Sol'Ex Spectroscopes\u003c\/h3\u003e\n\u003cp\u003eDesigned as a standard component for Shelyak's high-resolution spectrographs, this slit seamlessly integrates with the LISA and Lhires III models. It can also be purchased as an additional unit to allow for rapid changes between different setups in the field. Please note that a matching slit holder for your specific spectroscope (LISA or Lhires III) is required for use.\u003c\/p\u003e\n\u003cp\u003eThis component can also be adapted for stellar observations with a Sol'Ex spectroscope. To use it in this configuration, the Shelyak guiding module is a mandatory accessory to ensure proper alignment and function.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich slit on the Multiple Slit should I use for a bright star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a bright star like \u003cstrong\u003eVega\u003c\/strong\u003e, you should use the narrowest slits to achieve the highest spectral resolution. Start with the \u003cstrong\u003e15 µm\u003c\/strong\u003e or \u003cstrong\u003e19 µm\u003c\/strong\u003e positions. This will allow you to clearly separate fine absorption lines in the star's spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Multiple Slit with my Shelyak Sol'Ex for solar observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. While this slit is compatible with the Sol'Ex, it is intended for \u003cstrong\u003estellar observations\u003c\/strong\u003e only. For solar work, you should use the slit included with the Sol'Ex. Using this slit with a Sol'Ex for any target also requires the addition of the Shelyak guiding module.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate holder to use this Multiple Slit with my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, a matching slit holder is required.\u003c\/strong\u003e This slit module is designed to be installed into a holder specific to either the Lhires III or the LISA spectroscope. The holder is not included with the slit itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 35 µm slit on this Multiple Slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e35 µm slit\u003c\/strong\u003e allows the maximum amount of light to pass through to the sensor. This is critical for obtaining a usable spectrum from very faint deep-sky objects, such as distant galaxies or diffuse nebulae, where collecting every possible photon is more important than achieving high resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Multiple Slit compatible with the Shelyak LISA spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a standard slit for the Shelyak LISA spectroscope. However, you must pair it with the specific slit holder designed for the LISA to ensure correct installation and alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I buy a second Multiple Slit 15\/19\/23\/35 µm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePurchasing an additional slit set allows you to have multiple holders ready for immediate use. This facilitates quick changes in the field, minimizing downtime and the risk of handling delicate optical components in the dark.\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\u003eSlit Widths\u003c\/td\u003e\n\u003ctd\u003e15 µm, 19 µm, 23 µm, 35 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Positions\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Type\u003c\/td\u003e\n\u003ctd\u003eReflective (Mirror)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Compatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak LISA, Shelyak Lhires III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Compatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Sol'Ex (for stellar use, requires guiding module)\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\"\u003eMultiple Slit 15\/19\/23\/35 µm\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Lhires_III_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Lhires III Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943046312221,"sku":"SHK-SE0116","price":313.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Multiple-slit-15-19-23-35-m-1_f076e588-6b6d-443e-b1eb-45149470cc2b.jpg?v=1789616293","url":"https:\/\/davidastro.com\/fr\/products\/shelyak-se0116","provider":"David Astro","version":"1.0","type":"link"}