{"title":"Shelyak UVEX Spectroscopes","description":"\u003cp\u003eShelyak UVEX is a modular spectroscope whose resolution depends on the grating module installed: 150, 300, 1200 or 1800 lines\/mm, from low-resolution survey work to detailed line profiles. It comes as a manual UVEX Spectroscope or as the UVEX Motorized Spectroscope, and the motors module is also sold separately to upgrade a manual unit.\u003c\/p\u003e\u003cp\u003eOptions include a fiber optic connector kit, a 530 nm order filter kit, the Alpy and UVEX 35 µm slit and a 23\/200 µm photometric slit.\u003c\/p\u003e","products":[{"product_id":"shelyak-es0021","title":"Shelyak UVEX Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eWide spectral range from 350 nm (UV) to 1 µm (IR)\u003c\/li\u003e\n\u003cli\u003eMulti-position slit with 25µm, 50µm, 100µm, and 300µm options\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/8 telescopes\u003c\/li\u003e\n\u003cli\u003eLightweight 1.2 kg body (without camera)\u003c\/li\u003e\n\u003cli\u003eIncludes a 600 lines\/mm grating blazed at 500nm\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\u003eUVEX Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak UVEX Spectroscope is a highly versatile instrument built on an achromatic, crossed Czerny-Turner design, enabling scientific analysis across a vast spectral range from 350 nm in the ultraviolet to 1µm in the near-infrared. Its multi-position slit offers six apertures, from a high-resolution 25µm slit to a wide 3mm hole for easy targeting. Weighing only 1.2 kg (without a camera), the UVEX is engineered for seamless integration with telescopes operating at an optimal F\/8 ratio.\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\u003eCrossed Czerny-Turner Optics: 350nm to 1µm Spectral Range\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is designed as a \"crossed\" Czerny-Turner spectroscope, an optical configuration optimized for a flat field and high image quality across its entire operational range. This achromatic design ensures that it can capture spectra from the near-ultraviolet at 350 nm to the near-infrared at 1 µm, pushing the limits of what modern CMOS and CCD sensors can detect. This allows you to analyze a wide variety of stellar types and emission phenomena, from the Balmer series in hot stars to the infrared signatures of cooler 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\u003e6-Position Slit and Interchangeable 600 tr\/mm Grating\u003c\/h3\u003e\n\u003cp\u003eControl over spectral resolution is critical, and the UVEX provides this through two key mechanisms. It includes a 6-position slit wheel, easily changed with an included screwdriver, offering 25µm, 50µm, 100µm, and 300µm slits, plus a 25µm pinhole and a 3mm hole for target acquisition. A narrower slit yields higher resolution at the cost of light throughput, giving you the flexibility to adapt to your target's brightness. The spectroscope comes standard with a 600 lines\/mm grating, and a vernier scale allows for precise positioning of the grating to center your desired wavelength on the 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\u003eF\/8 Optimization and Precise M2 Mirror Focusing\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is ideally matched to telescopes with an F\/8 focal ratio, such as Ritchey-Chretien (RC) systems up to 400mm in diameter. While it can be used on systems as fast as F\/5 without vignetting, this comes with a slight degradation in image quality at the edges of the field. Focusing is managed by a precise, multi-turn knob that adjusts the internal M2 mirror, allowing you to achieve a sharp spectrum on your camera sensor without altering your telescope's main focuser.\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\u003eOptional Motorization and Included 3.2 kg Padded Case\u003c\/h3\u003e\n\u003cp\u003eDesigned for both field and observatory use, the UVEX can be upgraded with an optional motorization module for fully remote operation. For transport and storage, the instrument ships in a shockproof case with custom-cut foam, bringing the total weight to 3.2 kg. This case has dedicated slots for the spectrograph, a camera, and accessories like additional gratings or filters, ensuring your entire spectroscopy kit remains protected.\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 type of telescope is best for the UVEX Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX is optimized for an \u003cstrong\u003eF\/8 focal ratio\u003c\/strong\u003e, making it an excellent match for Ritchey-Chretien (RC), Schmidt-Cassegrain (SCT), or other catadioptric telescopes. It can be used on scopes as fast as F\/5, but with a minor loss of resolution at the field edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the spectral resolution with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can adjust the resolution in two ways. First, by selecting a different slit width on the \u003cstrong\u003e6-position slit wheel\u003c\/strong\u003e; a narrower slit like the 25µm provides higher resolution. Second, by swapping out the included 600 tr\/mm grating for an optional one with a different line density.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the UVEX Spectroscope capture the spectrum of a star like Vega (Alpha Lyrae) in the UV?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The UVEX has a spectral range extending down to \u003cstrong\u003e350 nm\u003c\/strong\u003e, which is well into the near-ultraviolet. This makes it ideal for studying the prominent Balmer absorption lines in the spectra of hot, A-type stars like Vega.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat camera do you recommend for the UVEX Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak recommends the \u003cstrong\u003eZWO ASI533MM Pro\u003c\/strong\u003e monochrome camera for use with the UVEX. The spectroscope is supplied with an adapter ring for ZWO cameras, and adapters for QHY and ATIK cameras are available separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the UVEX difficult to focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, focusing is straightforward. The UVEX features a dedicated \u003cstrong\u003emulti-turn knob\u003c\/strong\u003e that adjusts the internal M2 collimating mirror. This allows you to achieve a sharp focus for the spectrum on your camera's sensor independently of the main telescope focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I operate the UVEX Spectroscope from a remote observatory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The UVEX is designed to be compatible with an \u003cstrong\u003eoptional motorization module\u003c\/strong\u003e. When installed, this allows for remote control of the grating angle and other functions, making it suitable for automated or remote observatories.\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 Range\u003c\/td\u003e\n\u003ctd\u003e350 nm to 1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Options\u003c\/td\u003e\n\u003ctd\u003eMulti-position: 25µm, 50µm, 100µm, 300µm, 25µm hole, 3mm hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Telescope F\/D\u003c\/td\u003e\n\u003ctd\u003eF\/8 (usable to F\/5 with minor quality degradation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e145 x 140 x 120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (Spectroscope only)\u003c\/td\u003e\n\u003ctd\u003e1.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (with carrying case)\u003c\/td\u003e\n\u003ctd\u003e3.2 kg\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\"\u003eUVEX Spectroscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShockproof Carrying Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e600 tr\/mm Grating\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (installed)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZWO Camera Adapter Ring\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePhillips Screwdriver\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlastic Vernier for 600 gr\/mm Grating\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBag of Spare Screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAutoguiding Module Screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\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_UVEX_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 UVEX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Demetra_Software_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 Demetra Software 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":52943031795997,"sku":"SHK-ES0021","price":7814.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-UVEX-Spectroscope-1_c215e6c3-6f26-4c18-9eed-3ea279d077a9.jpg?v=1789615956"},{"product_id":"shelyak-es0034","title":"Shelyak UVEX Motorized Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFull remote control of grating, focus, and calibration\u003c\/li\u003e\n\u003cli\u003eAchromatic design covers a 350 nm to 1µm spectral range\u003c\/li\u003e\n\u003cli\u003e5-position slit module includes 25µm, 50µm, 100µm, and 300µm slits\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/8 telescopes\u003c\/li\u003e\n\u003cli\u003eOpen-source USIS communication protocol for custom software integration\u003c\/li\u003e\n\u003cli\u003eWeighs 1.46 Kg without cameras\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\u003eShelyak UVEX Motorized Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak UVEX Motorized spectroscope enables fully remote scientific analysis, integrating motorized control of its grating and focus with an achromatic optical design covering a wide 350 nm to 1µm spectral range. Optimized for F\/8 systems, this 1.46 Kg instrument provides a choice of five slit positions, from a high-resolution 25µm slit to a 300µm option for fainter targets, all controllable via the documented USIS protocol.\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\u003eAchromatic Optics: The 350 nm to 1µm Spectral Range\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is built around an achromatic optical system, specifically designed to maintain focus across an expansive spectral range from the near-ultraviolet at 350 nm to the near-infrared at 1µm. This allows you to explore phenomena beyond the visible spectrum, capturing data at the limits of modern CMOS and CCD sensor capabilities without needing to constantly refocus for different wavelengths.\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\u003eFull Remote Operation at F\/8\u003c\/h3\u003e\n\u003cp\u003eThis motorized version of the UVEX is engineered for unattended, remote operation. From your control software, you can precisely set the central wavelength by adjusting the grating angle, fine-tune instrument focus, and manage an external calibration module. This integration makes it possible to automate an entire observing session: acquiring science data, then capturing dark, flat-field, and calibration lamp frames without any physical intervention at the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 5-Position Slit Module: From 25µm to 300µm\u003c\/h3\u003e\n\u003cp\u003eThe UVEX includes a versatile slit module with five user-selectable options: 25µm, 50µm, 100µm, 300µm, and a 25µm pinhole for precise calibration. This range allows you to balance spectral resolution against signal-to-noise; use the narrow 25µm slit for detailed analysis of bright stars or the wider 300µm slit to maximize light throughput on faint nebulae. Note that slit selection is a manual adjustment performed at the 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\u003eUSIS Protocol: Open Integration for Custom Automation\u003c\/h3\u003e\n\u003cp\u003eControl of the UVEX is managed through the USIS communication protocol, an open standard documented by Shelyak. While designed for seamless integration with Shelyak's own DEMETRA software, the open protocol gives advanced users the freedom to write their own drivers and control scripts. This allows for deep integration into custom observatory automation platforms like N.I.N.A., TheSkyX, or proprietary research environments.\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 advantage of the UVEX Motorized spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is \u003cstrong\u003efull remote operation\u003c\/strong\u003e. You can remotely control the central wavelength (grating), instrument focus, and an external calibration module. This allows for completely automated data acquisition sequences, which is essential for robotic observatories or simply for efficiency during a night of observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the slit on the UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSlit selection on the UVEX is a \u003cstrong\u003emanual process\u003c\/strong\u003e. You must physically access the instrument and use a screwdriver to rotate the slit wheel to one of the five positions (25µm, 50µm, 100µm, 300µm, or 25µm hole). While the grating and focus are motorized, the slit is not.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope works best with the UVEX Motorized at its optimal F\/8 ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX is optimized for an \u003cstrong\u003eF\/8\u003c\/strong\u003e focal ratio, which is common for many Schmidt-Cassegrain (SCT) and Ritchey-Chrétien (RC) telescopes, especially when used with a focal reducer. A standard C8 or a 10-inch RC would be excellent matches, providing a bright, well-focused beam to the spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the UVEX Motorized resolve the Balmer series in the spectrum of Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Vega is a bright A-type star with very prominent hydrogen absorption lines (the Balmer series). Using one of the narrower slits, such as the \u003cstrong\u003e25µm or 50µm\u003c\/strong\u003e option, the UVEX can easily achieve the resolution needed to clearly separate and study these lines, from H-alpha in the red down to the higher-order lines in the blue and near-UV portion of its 350 nm to 1µm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the motorized focus on the UVEX Motorized adjust?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe motorized focus adjusts the internal optics of the spectroscope to ensure the spectrum is perfectly sharp on your camera's sensor. This is critical for achieving the highest possible resolution and is especially useful for compensating for small thermal shifts in focus over the course of a long observing night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the USIS communication protocol difficult to use for custom software?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe USIS protocol is designed to be straightforward for developers. Shelyak provides documentation for the protocol, allowing programmers to integrate UVEX control into various platforms. While it requires some programming knowledge, it is a well-defined serial communication protocol, making it accessible for those familiar with creating ASCOM drivers or scripting with languages like Python.\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 Range\u003c\/td\u003e\n\u003ctd\u003e350 nm to 1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Telescope F-ratio\u003c\/td\u003e\n\u003ctd\u003eF\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Module\u003c\/td\u003e\n\u003ctd\u003eMulti-position: 25µm, 50µm, 100µm, 300µm, and 25µm hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating Control\u003c\/td\u003e\n\u003ctd\u003eMotorized (selects central wavelength)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocus Control\u003c\/td\u003e\n\u003ctd\u003eMotorized (fine-tunes instrument focus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Control\u003c\/td\u003e\n\u003ctd\u003eMotorized control of external calibration module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eUSIS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e153 x 154 x 133 mm (without cameras)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.46 Kg (without camera)\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_UVEX_Motorized_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 UVEX Motorized Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Demetra_Software_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 Demetra Software 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":52943032647965,"sku":"SHK-ES0034","price":9205.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-UVEX-motorized-1_c831c97a-5022-461b-8e52-940b2be7bd11.jpg?v=1789615972"},{"product_id":"shelyak-pf0074","title":"Shelyak Uvex Motors Module","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMotorizes your existing Shelyak UVEX Spectrograph\u003c\/li\u003e\n\u003cli\u003eEnables remote control of central wavelength via motorized grating\u003c\/li\u003e\n\u003cli\u003eProvides remote fine-focus adjustment for optimal resolution\u003c\/li\u003e\n\u003cli\u003eAdds only 1.46 kg to the UVEX assembly (without camera)\u003c\/li\u003e\n\u003cli\u003eIntegrates control for an external calibration module\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 Uvex Motors Module\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Uvex Motors module transforms your manually-operated spectrograph into a fully remote instrument, adding just 1.46 kg to your optical train. Housed within a 153 x 154 x 133 mm frame when installed, this upgrade provides precise, repeatable motorized control over both the grating for central wavelength selection and the fine focus mechanism for achieving optimal spectral resolution from your observatory control room.\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\u003eRemote and Automated Spectroscopy with the UVEX Motors Module\u003c\/h3\u003e\n\u003cp\u003eThis module is a direct upgrade for the Shelyak UVEX spectrograph, converting it from a hands-on instrument to a fully automated component of your imaging setup. By motorizing the critical adjustments, you can now operate the UVEX remotely, eliminating vibrations and enabling long, scripted observation sequences without being physically present at the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMotorized Grating and Focus: Precision Control in a 1.46 kg Package\u003c\/h3\u003e\n\u003cp\u003eThe core of this upgrade lies in its two primary motorized functions. The motorized grating allows you to remotely select the central wavelength of your spectrum, making it possible to study different spectral features of a target in a single session. The motorized focus is critical for compensating for temperature changes throughout the night, ensuring your spectra remain perfectly sharp for the highest possible resolution.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWavelength Selection:\u003c\/strong\u003e Remotely scan different areas of the spectrum without touching the instrument, ideal for variable stars or objects with complex spectral features.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocus Adjustment:\u003c\/strong\u003e Achieve and maintain critical focus to resolve fine spectral lines, a task that is nearly impossible to perfect manually on a remote system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal Footprint:\u003c\/strong\u003e The entire motorized system adds 1.46 kg to the UVEX, a manageable weight that typically requires only minor rebalancing of your mount.\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\u003eAutomated Calibration: 4-Position Control for Sky, Dark, Flat \u0026amp; Cal Frames\u003c\/h3\u003e\n\u003cp\u003eBeyond mechanical control, the Uvex Motors module integrates the logic for a complete, automated calibration workflow. It includes the same control features as the SPOX module, allowing it to manage an external calibration unit. This enables you to seamlessly switch between acquiring data from the sky and capturing necessary dark, flat, and calibration lamp frames for professional-grade data reduction.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoftware Integration:\u003c\/strong\u003e The module is fully supported by Shelyak's DEMETRA software for a plug-and-play experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Protocol:\u003c\/strong\u003e For users with custom observatory software, Shelyak has published the USIS communication protocol, allowing for deep integration into any control environment.\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 the primary benefit of adding the Uvex Motors module to my spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is \u003cstrong\u003eremote operation\u003c\/strong\u003e. The Uvex Motors module allows you to control the spectrograph's grating (central wavelength) and focus from a computer, eliminating the need to be physically at the telescope. This is essential for automated observatories and for maintaining optimal focus as temperatures change during the night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate calibration module to use all the features of the Uvex Motors module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Uvex Motors module includes the electronic control system for an \u003cstrong\u003eexternal calibration module\u003c\/strong\u003e, but the calibration unit itself is a separate item. This feature allows you to automate your entire data acquisition sequence, from capturing the target's spectrum (Sky) to taking Flat, Dark, and reference lamp (Calibration) frames.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the Uvex Motors module with software other than DEMETRA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While it is designed for seamless integration with Shelyak's DEMETRA software, the module uses an open communication protocol called \u003cstrong\u003eUSIS\u003c\/strong\u003e. Shelyak provides documentation for this protocol, allowing advanced users to write their own scripts or integrate control into third-party observatory software like N.I.N.A. or SGP via custom drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Uvex Motors module help when observing a Be star like Gamma Cassiopeiae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBe stars like Gamma Cassiopeiae (gamma Cas) have dynamic emission lines (like H-alpha) that change over time. The Uvex Motors module allows you to precisely and repeatedly center your grating on these specific lines night after night. You can also remotely check focus to ensure you achieve the highest possible resolution to measure subtle changes in the line profiles, which is crucial for this type of scientific work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need to rebalance my telescope after installing the 1.46 kg Uvex Motors module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMost likely, yes. The module and the UVEX spectrograph together weigh 1.46 kg (without a camera). This additional weight will almost certainly require you to rebalance your mount in both axes to ensure accurate tracking and guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI use an 8\" SCT at f\/10. How does motorized focus on the Uvex Motors module improve my results?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn an SCT, temperature changes can cause significant focus shift. The motorized focus control of the Uvex Motors module is a major advantage. It allows you to make tiny, precise adjustments to the spectrograph's internal focus remotely throughout the night, ensuring your spectral lines remain sharp and narrow without having to touch the telescope's primary focuser, which can introduce mirror shift.\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\u003eMotorized Grating Control\u003c\/td\u003e\n\u003ctd\u003eAllows remote selection of the central observation wavelength.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotorized Focus Control\u003c\/td\u003e\n\u003ctd\u003eAllows remote fine-tuning of focus for optimal optical quality.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Module Control\u003c\/td\u003e\n\u003ctd\u003eRemotely controls an external calibration unit, switching between Sky, Dark, Flat, and Calibration light sources.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with UVEX)\u003c\/td\u003e\n\u003ctd\u003e153 x 154 mm, Height: 133 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (with UVEX, no camera)\u003c\/td\u003e\n\u003ctd\u003e1.46 kg\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\"\u003eUvex Motors Module\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_UVEX_Motors_Module_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 UVEX Motors Module 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":52943040053533,"sku":"SHK-PF0074","price":2453.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Uvex-Motors-module-1_d2d12418-d094-4058-ae73-21a70450c813.jpg?v=1789616127"},{"product_id":"shelyak-se0145","title":"Shelyak Photometric Slit 23\/200µm for Alpy 600 \u0026 UVEX","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDual slit design with 23µm and 200µm widths\u003c\/li\u003e\n\u003cli\u003eEnables high-resolution spectroscopy and spectrophotometry\u003c\/li\u003e\n\u003cli\u003eDesigned for Shelyak Alpy 600 and UVEX spectroscopes\u003c\/li\u003e\n\u003cli\u003eRequires the Alpy Guiding Module 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\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\u003ePhotometric Slit 23\/200µm for Alpy 600 \u0026amp; UVEX\u003c\/h2\u003e\n\u003cp\u003eThis Photometric Slit for Alpy 600 and UVEX spectroscopes enables true spectrophotometry by integrating two distinct apertures in a single component: a narrow 23µm slit for maximum resolution and a wide 200µm slit for capturing total stellar flux.\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 23µm \/ 200µm Slit: A Dual-Purpose Tool for Spectrophotometry\u003c\/h3\u003e\n\u003cp\u003eThis accessory allows you to switch between two fundamental modes of spectroscopic observation without changing hardware. The 23µm slit provides the narrowest aperture, maximizing the spectral resolution of your Alpy 600 or UVEX to resolve fine details in stellar spectra. When your goal is to measure the precise brightness of an object across different wavelengths—true spectrophotometry—the wider 200µm slit ensures that all the light from the star enters the spectroscope, even in moments of poor seeing, for an accurate flux measurement.\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 dual slits on the 23\/200µm Photometric Slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two slits serve two different scientific goals. The narrow \u003cstrong\u003e23µm slit\u003c\/strong\u003e is used to achieve the highest possible spectral resolution for detecting fine absorption or emission lines. The wide \u003cstrong\u003e200µm slit\u003c\/strong\u003e is used for spectrophotometry, where the goal is to capture all of a star's light to accurately measure its brightness, sacrificing some resolution for photometric precision.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I use the 23µm slit with my Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUse the 23µm slit when your primary objective is resolving detail in a spectrum. This is ideal for classifying star types, identifying chemical compositions, or measuring the doppler shift of spectral lines in objects like binary stars or quasars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen is the 200µm slit the right choice for the Photometric Slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 200µm slit is essential for spectrophotometry. If you are studying variable stars, supernovae, or any object where you need to create an accurate spectral energy distribution curve, the wide slit ensures you are measuring the total energy output of the star without light loss at the aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Photometric Slit compatible with all Shelyak spectrographs?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this slit is specifically designed for use with the \u003cstrong\u003eShelyak Alpy 600\u003c\/strong\u003e and \u003cstrong\u003eShelyak UVEX\u003c\/strong\u003e spectroscope models. It is not compatible with other instruments like the Lhires III or LISA.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need other accessories to use the 23\/200µm Photometric Slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this photometric slit must be used with the \u003cstrong\u003eAlpy Guiding Module\u003c\/strong\u003e. The guiding module is required to position the target star accurately on the desired slit and maintain that position during an exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 200µm slit on the Photometric Slit help with poor seeing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAtmospheric turbulence (seeing) causes a star's image to move and swell. A narrow slit can block some of this light as the star image shifts, leading to an inaccurate brightness measurement. The wide 200µm slit provides a large enough opening to contain the entire star image even under poor seeing conditions, ensuring all its light enters the spectroscope for a valid photometric reading.\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\u003e23µm (High Resolution) \/ 200µm (Photometry)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Function\u003c\/td\u003e\n\u003ctd\u003eSpectrophotometry \u0026amp; High-Resolution Spectroscopy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Alpy 600, Shelyak UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Accessory\u003c\/td\u003e\n\u003ctd\u003eAlpy Guiding Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943048638749,"sku":"SHK-SE0145","price":305.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Photometric-slit-23-200-m-1_d73fed93-587d-42fe-8a9a-5716c60391fd.jpg?v=1789616359"},{"product_id":"shelyak-se0150","title":"Shelyak Alpy \u0026 UVEX 35 µm slit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e35 µm Precision Slit Width\u003c\/li\u003e\n\u003cli\u003eIntegrated Guiding Mirror Surface\u003c\/li\u003e\n\u003cli\u003eCompatible with Shelyak Alpy \u0026amp; UVEX Spectrographs\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\u003eAlpy \u0026amp; UVEX 35 µm slit\u003c\/h2\u003e\n\u003cp\u003eThe Alpy \u0026amp; UVEX 35 µm slit is a core component for Shelyak spectrographs, functioning as both a precision entrance aperture and a guiding mirror. Its 35 µm width strikes a versatile balance between spectral resolution and light throughput, making it a standard choice for a wide range of astronomical targets.\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 35µm Slit: Balancing Resolution and Light Throughput\u003c\/h3\u003e\n\u003cp\u003eIn spectroscopy, the slit width directly controls the trade-off between the detail in your spectrum and its brightness. The 35 µm slit for the Alpy and UVEX spectrographs is a popular choice because it represents a highly effective compromise for many observing conditions and targets.\u003c\/p\u003e\n\u003cp\u003eThe polished, reflective surface surrounding the slit allows you to view the entire star field through your guiding camera. This ensures you can keep your target perfectly centered on the nearly invisible slit for long exposures, maximizing signal and preventing drift.\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\u003eSlit Selection for Alpy \u0026amp; UVEX: The 35µm Slit vs. Other Options\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct slit is fundamental to achieving your scientific goals. While the 35µm slit is an excellent all-rounder, understanding its context helps you make the right decision for your specific target.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Narrower Slits (e.g., 25 µm):\u003c\/strong\u003e A narrower slit yields higher spectral resolution but passes significantly less light. It is the superior choice for studying fine absorption lines in the spectra of bright stars, where signal is plentiful.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Wider Slits (e.g., 50 µm+):\u003c\/strong\u003e A wider slit captures more photons, which is critical for obtaining a usable signal on very faint objects like distant galaxies or low-surface-brightness nebulae. The trade-off is a lower-resolution spectrum where fine details may be blurred.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 35µm slit is the workhorse option, ideal for general stellar classification, analyzing emission lines in planetary nebulae, and capturing spectra of moderately bright comets and supernovae.\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 Alpy \u0026amp; UVEX 35 µm slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt serves two critical functions. The precision-cut \u003cstrong\u003e35 µm slit\u003c\/strong\u003e acts as the entrance aperture for the spectrograph, determining the resolution of the spectrum. The reflective surface around the slit acts as a \u003cstrong\u003eguiding mirror\u003c\/strong\u003e, allowing you to see the star field and keep your target perfectly centered for the duration of an exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 35 µm slit affect the spectral resolution of my Alpy or UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit width is a primary factor in determining spectral resolution. A narrower slit produces a sharper, higher-resolution spectrum, allowing you to resolve finer details. The \u003cstrong\u003e35 µm slit\u003c\/strong\u003e provides a strong intermediate resolution, suitable for many projects from stellar classification to emission line studies in nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I choose the 35 µm slit over a narrower one for my Alpy\/UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should choose the \u003cstrong\u003e35 µm slit\u003c\/strong\u003e when light throughput is as important as resolution. While a narrower slit (e.g., 25µm) offers higher resolution, it passes less light, requiring longer exposures. The 35µm slit is ideal for moderately faint targets or when seeing conditions don't support the highest possible resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Alpy \u0026amp; UVEX 35 µm slit for guiding on my target star?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The component is a guiding mirror with a slit at its center. The light from your target that doesn't pass through the slit is reflected into your guiding camera, allowing you to monitor the star's position and make precise tracking corrections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 35 µm slit a good choice for observing faint nebulae like the Orion Nebula (M42) with a Shelyak spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e35 µm slit\u003c\/strong\u003e is an excellent choice for targets like the Orion Nebula (M42). It allows enough light from the extended object to pass through to achieve a good signal-to-noise ratio in a reasonable time, while still providing enough resolution to separate key emission lines like Hydrogen-alpha and Oxygen-III.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eFor measuring the redshift of a bright quasar like 3C 273, would the 35 µm slit be appropriate for my UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e35 µm slit\u003c\/strong\u003e is a very capable option for a bright quasar like 3C 273. It provides a good balance, capturing enough light for a clear continuum while delivering the resolution needed to accurately measure the shift in prominent spectral lines, such as the broad Hydrogen-beta line used for redshift calculations.\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 Width\u003c\/td\u003e\n\u003ctd\u003e35 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Alpy and UVEX series spectrographs\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\"\u003eAlpy \u0026amp; UVEX 35 µm slit\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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_Alpy_600_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 Alpy 600 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":52943049195805,"sku":"SHK-SE0150","price":305.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Alpy-UVEX-35-m-slit-1_b2bb2b2b-316f-4f80-84b8-877210aaf9ff.jpg?v=1789616376"},{"product_id":"shelyak-se0238","title":"Shelyak Fiber Optic Connector Kit for UVEX","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts the Shelyak UVEX spectrograph for fiber optic input\u003c\/li\u003e\n\u003cli\u003eEnables physical separation of the telescope and spectrograph\u003c\/li\u003e\n\u003cli\u003eIdeal for permanent observatory installations to reduce vibration and thermal influence\u003c\/li\u003e\n\u003cli\u003eFacilitates a stable and repeatable setup for long-term projects\u003c\/li\u003e\n\u003cli\u003eEngineered for a trade-off between light throughput and spectral resolution\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\u003eFiber Optic Connector Kit for UVEX\u003c\/h2\u003e\n\u003cp\u003eThis Fiber Optic Connector Kit adapts the Shelyak UVEX spectrograph for use with a fiber optic feed, allowing you to physically decouple the instrument from your telescope. This capability is essential for permanent observatory setups where the spectrograph can be mounted on a stable pier or bench, isolated from telescope vibrations and thermal variations. By feeding light directly from the telescope's focal plane via an optical fiber, you gain significant stability for long-term scientific projects, such as exoplanet transit monitoring or variable star photometry.\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\u003eRemote Light Injection for the UVEX Spectrograph\u003c\/h3\u003e\n\u003cp\u003eThe primary function of this kit is to enable remote spectroscopy. Instead of mounting the heavy and sensitive UVEX directly onto your moving telescope, this adapter allows you to place it in a controlled environment. This minimizes mechanical flexure, focus drift due to temperature changes, and vibrations, which are critical sources of error in high-resolution spectroscopy.\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\u003eUnderstanding the Resolution Trade-Off\u003c\/h3\u003e\n\u003cp\u003eUsing an optical fiber feed involves a deliberate engineering trade-off. A typical optical fiber has a larger diameter than the UVEX's standard entrance slit. This increases light throughput, which is beneficial for faint targets, but it also reduces the instrument's ultimate spectral resolution. This kit is therefore optimized for applications where stability and light-gathering are more critical than achieving the highest possible resolution the UVEX can offer with its narrowest slit.\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 primary purpose of the UVEX Fiber Optic Connector Kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of this kit is to allow you to connect a fiber optic cable to your Shelyak UVEX spectrograph. This enables you to physically separate the spectrograph from the telescope, which is ideal for permanent observatory setups to improve stability and reduce environmental interference like vibration and temperature changes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does using this fiber optic kit affect the resolution of my UVEX spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing an optical fiber reduces the spectrograph's resolution compared to using its standard, narrower slit. The larger core of a typical fiber acts as a wider entrance slit, increasing light throughput for fainter targets but resulting in broader spectral lines. This is a known trade-off for gaining the stability of a fiber-fed system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I use a fiber optic feed with my UVEX for a project on a star like Betelgeuse (Alpha Orionis)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor long-term monitoring of a variable star like Betelgeuse, stability is paramount. A fiber feed isolates the UVEX spectrograph from the telescope's movement and thermal shifts, ensuring that any changes you record in the star's spectrum are genuine and not artifacts from the equipment. This stable, repeatable setup is crucial for differential photometry and radial velocity studies over weeks or months.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this kit to build a remote-controlled spectroscopy setup in my observatory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this kit is a key component for such a setup. By placing the UVEX on a stable bench and running a fiber optic cable to the telescope, you can automate your data acquisition without having to physically interact with the spectrograph, minimizing disturbances and allowing for fully remote operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Fiber Optic Connector Kit for UVEX include the fiber optic cable itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this kit is an adapter to connect a fiber to the spectrograph. The optical fiber cable itself is sold separately, allowing you to choose the appropriate length and core diameter for your specific observatory configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this connector kit compatible with other spectrographs, like the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit is specifically designed for the Shelyak UVEX spectrograph. It is not compatible with other models like the Lhires III, which have different mechanical interfaces and optical designs.\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 accessory.\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\"\u003ePackage contents not specified.\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_UVEX_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 UVEX 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":52943051686173,"sku":"SHK-SE0238","price":305.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Fiber-optic-connector-kit-for-UVEX-1_864bbaf8-6b09-4703-aeb1-1f99092dd2dd.jpg?v=1789616451"},{"product_id":"shelyak-se0242","title":"Shelyak Grating module for the UVEX - 150 l\/mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e150 lines\/mm Grating Density\u003c\/li\u003e\n\u003cli\u003eDesigned for the Shelyak UVEX Spectroscope\u003c\/li\u003e\n\u003cli\u003eOptimized for Low-Resolution, Wide-Coverage Spectroscopy\u003c\/li\u003e\n\u003cli\u003eInterchangeable Module for UVEX System\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\u003eGrating module for the UVEX - 150 l\/mm\u003c\/h2\u003e\n\u003cp\u003eThis optional 150 lines\/mm grating module expands the capabilities of your UVEX spectroscope, sitting at the lowest-resolution end of a lineup that includes 300, 600, 1200, and 1800 l\/mm options. By trading the high resolution of the standard 600 l\/mm grating for maximum wavelength coverage, the 150 l\/mm module is purpose-built for survey work and classifying a wide range of celestial objects in a single exposure.\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\u003e150 l\/mm Grating: Maximizing Spectral Range for Survey Work\u003c\/h3\u003e\n\u003cp\u003eThe primary role of the 150 l\/mm grating is to capture the widest possible spectral range that your camera sensor can accommodate in a single frame. This low-dispersion capability is essential for survey projects where the goal is to quickly characterize many targets, such as classifying stars, identifying supernova types, or monitoring cometary emissions.\u003c\/p\u003e\n\u003cp\u003eFor faint targets, lower dispersion concentrates the object's light over fewer pixels, increasing the signal-to-noise ratio of the continuum. This makes the 150 l\/mm grating the most efficient choice for obtaining usable spectra of faint novae, asteroids, or distant quasars where capturing the overall spectral shape is more critical than resolving fine details.\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\u003eUVEX 150 l\/mm vs. 600 l\/mm Grating: Resolution vs. Wavelength Coverage\u003c\/h3\u003e\n\u003cp\u003eChoosing between the optional 150 l\/mm grating and the standard 600 l\/mm grating is a direct trade-off between spectral detail and wavelength coverage. Your scientific objective determines which is the correct tool for the job.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 600 l\/mm Grating:\u003c\/strong\u003e This grating provides four times the resolution, making it the superior choice for resolving fine spectral features. It is ideal for measuring subtle Doppler shifts, studying complex stellar atmospheres, or separating closely spaced emission lines in planetary nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional 150 l\/mm Grating:\u003c\/strong\u003e This grating captures a much wider band of the spectrum on the same sensor. This allows you to see the entire visible spectrum of an object at once, from the violet H-delta line to the red H-alpha line, without creating a mosaic of multiple images. This is invaluable for transient events or initial object classification.\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\"\u003eWhy would I choose the 150 l\/mm grating for my UVEX instead of the standard 600 l\/mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should choose the \u003cstrong\u003e150 l\/mm grating\u003c\/strong\u003e when your primary goal is to capture the widest possible range of wavelengths in a single exposure. It is ideal for survey work, classifying unknown objects, or studying targets with very broad spectral features. The standard \u003cstrong\u003e600 l\/mm grating\u003c\/strong\u003e is better when you need high resolution to study fine details within a narrow spectral window.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects, like a Type Ia supernova or a Wolf-Rayet star, are best studied with the UVEX 150 l\/mm grating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX 150 l\/mm grating is excellent for both. \u003cstrong\u003eType Ia supernovae\u003c\/strong\u003e are identified by a characteristic broad silicon absorption feature (Si II) at 6150Å, which is easily captured with this grating's wide coverage. \u003cstrong\u003eWolf-Rayet stars\u003c\/strong\u003e have extremely broad emission lines (sometimes hundreds of angstroms wide) from stellar winds, and the 150 l\/mm grating ensures the entire profile of these features fits within a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 150 l\/mm grating affect exposure times with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Because the 150 l\/mm grating disperses light less than a higher-density grating, it concentrates the starlight onto fewer pixels on your camera sensor. This results in a higher signal-to-noise ratio for the stellar continuum in a given exposure time, making it more efficient for capturing spectra of faint objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-Q\"\u003eCan I use the UVEX 150 l\/mm grating to measure precise radial velocities?\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is not the right tool for that task. The low resolution of the 150 l\/mm grating is insufficient for measuring the small Doppler shifts required for precise radial velocity work. For those applications, a higher resolution grating, such as the standard 600 l\/mm or the optional 1200 l\/mm, is necessary.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I'm trying to classify a newly discovered comet with my UVEX, is the 150 l\/mm or the 600 l\/mm grating a better choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e150 l\/mm grating\u003c\/strong\u003e is the better choice for initial comet classification. Cometary spectra often show broad emission bands from molecules like C2 (the Swan bands) and CN spread across the visible spectrum. The wide coverage of the 150 l\/mm grating allows you to capture all these features simultaneously to quickly assess the comet's composition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it difficult to swap gratings on the Shelyak UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Shelyak UVEX is designed as a modular system. Swapping gratings is a straightforward process, allowing you to reconfigure the spectroscope in the field to match your observing target and scientific goals for the night. Always refer to the UVEX manual for the correct procedure.\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\u003eGrating Density\u003c\/td\u003e\n\u003ctd\u003e150 lines\/mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak UVEX Spectroscope\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\"\u003eUVEX 150 l\/mm Grating Module\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_UVEX_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 UVEX 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":52943051948317,"sku":"SHK-SE0242","price":992.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Grating-module-for-the-UVEX-150-l-mm-1_8c7669aa-09e4-416e-a28d-be125b6cbaa3.jpg?v=1789616459"},{"product_id":"shelyak-se0243","title":"Shelyak Grating module for the UVEX - 300 l\/mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300 lines\/mm Grating Density\u003c\/li\u003e\n\u003cli\u003eOptional Interchangeable Module\u003c\/li\u003e\n\u003cli\u003eDesigned for the Shelyak UVEX Spectroscope\u003c\/li\u003e\n\u003cli\u003eLower Resolution, Wider Spectral Coverage\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\u003eGrating module for the UVEX - 300 l\/mm\u003c\/h2\u003e\n\u003cp\u003eThis optional Grating Module for the Shelyak UVEX spectroscope features a line density of 300 lines\/mm, offering a different balance of resolution and spectral coverage compared to the standard 600 l\/mm grating. It is a key component in a modular system that includes gratings from 150 l\/mm up to 1800 l\/mm, allowing you to tailor the instrument's capabilities to specific scientific targets.\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 300 l\/mm Grating: Balancing Resolution and Spectral Range\u003c\/h3\u003e\n\u003cp\u003eIn spectroscopy, grating choice dictates a fundamental trade-off. The 300 lines\/mm grating disperses incoming light less aggressively than higher-density gratings. This results in lower spectral resolution but allows a significantly wider range of wavelengths to fit onto your camera's sensor in a single exposure.\u003c\/p\u003e\n\u003cp\u003eThis capability is critical for survey work, initial classification of variable stars or supernovae, and studying objects with very broad spectral features. For faint targets, concentrating the light over a smaller sensor area can also improve the signal-to-noise ratio for the overall spectrum, making it a valuable tool for capturing data on challenging 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\u003eChoosing Your Grating: 300 l\/mm vs. the 600 l\/mm Standard\u003c\/h3\u003e\n\u003cp\u003eWhile the UVEX's standard 600 l\/mm grating provides an excellent general-purpose balance for many projects, the 300 l\/mm module serves a specific and complementary role. You would choose the 300 l\/mm grating when your scientific goal prioritizes wavelength coverage over fine detail.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e300 l\/mm Grating:\u003c\/strong\u003e Best for wide-field spectroscopy. Use it to capture the full spectrum of a nova from the hydrogen-alpha to hydrogen-beta lines in one frame, or for classifying multiple stars in a cluster simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600 l\/mm Grating (Standard):\u003c\/strong\u003e The versatile workhorse. Ideal for resolving the double-peaked emission lines in Be stars or studying the detailed structure of planetary nebulae spectra.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Density Gratings (1200\/1800 l\/mm):\u003c\/strong\u003e These are reserved for high-resolution studies of single, narrow spectral lines, such as measuring the radial velocity of a star via Doppler shift.\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 the primary use for the Shelyak UVEX 300 l\/mm grating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 300 l\/mm grating is designed for low-resolution spectroscopy where capturing a wide range of wavelengths in a single image is more important than resolving fine details. It is ideal for survey projects, classifying unknown objects, and studying targets with broad spectral features like supernovae or novae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 300 l\/mm grating compare to the standard 600 l\/mm grating included with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 300 l\/mm grating provides half the spectral resolution of the standard 600 l\/mm grating. In exchange, it covers a much wider spectral range on the same sensor. The 600 l\/mm is a general-purpose tool for detailed analysis, while the 300 l\/mm is a specialized tool for wide-field spectroscopic surveys.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen would I choose the 300 l\/mm grating for observing a nova like Nova Persei (GK Persei)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a nova, especially in its early, rapidly evolving stages, the 300 l\/mm grating is an excellent choice. It allows you to capture the entire visible spectrum, including the broad P Cygni profiles and multiple emission lines (like the Balmer series), in a single exposure to monitor its overall evolution. A higher-resolution grating might require multiple exposures and mosaicking to cover the same range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 300 l\/mm grating fit my Shelyak UVEX spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This grating is specifically designed as an interchangeable module for the Shelyak UVEX spectroscope, allowing you to easily swap it with the standard 600 l\/mm grating or other optional gratings in the series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 300 l\/mm grating better for faint objects than the 1200 l\/mm grating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for capturing a detectable spectrum. The 300 l\/mm grating concentrates the faint light over a smaller area on the sensor, improving the signal-to-noise ratio of the overall spectrum. The 1200 l\/mm grating spreads that same faint light out much further, which can make the resulting high-resolution spectrum too dim to be useful without very long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 300 l\/mm grating to measure the redshift of a quasar like 3C 273?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent application for the 300 l\/mm grating. The broad emission lines of a quasar like 3C 273 are easily visible at this resolution, and the wide spectral coverage helps you identify multiple lines to confirm the redshift. The goal is to identify the pattern of shifted lines, not to resolve their internal structure, making low resolution ideal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eGrating Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstrument\u003c\/td\u003e\n\u003ctd\u003eShelyak UVEX Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating Density\u003c\/td\u003e\n\u003ctd\u003e300 lines\/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\"\u003eGrating Module for UVEX (300 l\/mm)\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_UVEX_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 UVEX 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":52943052275997,"sku":"SHK-SE0243","price":992.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Grating-module-for-the-UVEX-150-l-mm-1_b112a085-7d93-4f03-a91a-1d652c44b9a9.jpg?v=1789616467"},{"product_id":"shelyak-se0245","title":"Shelyak Grating module for the UVEX - 1200 l\/mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e1200 lines\/mm Grating Density\u003c\/li\u003e\n\u003cli\u003eDesigned for the Shelyak UVEX Spectroscope\u003c\/li\u003e\n\u003cli\u003eEnables High-Resolution Spectroscopy\u003c\/li\u003e\n\u003cli\u003eUser-Interchangeable Module\u003c\/li\u003e\n\u003cli\u003eDoubles Resolution of Standard Grating\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\u003eGrating module for the UVEX - 1200 l\/mm\u003c\/h2\u003e\n\u003cp\u003eThis optional 1200 lines\/mm grating module for the Shelyak UVEX spectroscope is engineered specifically for high-resolution applications. It directly replaces the standard 600 l\/mm grating supplied with the UVEX, effectively doubling the instrument's native spectral resolving power for detailed scientific analysis.\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 with the 1200 l\/mm Grating\u003c\/h3\u003e\n\u003cp\u003eIncreasing a spectroscope's line density from 600 l\/mm to 1200 l\/mm allows you to resolve finer details within a star's spectrum. This is critical for advanced projects such as monitoring the emission line profile changes in Be stars, measuring small Doppler shifts in spectroscopic binaries, or separating closely spaced absorption lines in stellar atmospheres.\u003c\/p\u003e\n\u003cp\u003eBy spreading the light over a greater angle, the 1200 l\/mm grating makes these subtle spectral features large enough for your camera sensor to detect. This module transforms the UVEX into an instrument capable of contributing to pro-am research campaigns that require higher resolving power than the stock configuration can provide.\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\u003eChoosing Your Grating: 1200 l\/mm vs. the 600 l\/mm Standard\u003c\/h3\u003e\n\u003cp\u003eThe primary trade-off for higher resolution is a reduction in the spectral range captured in a single exposure. While the standard 600 l\/mm grating provides a balanced view of a wide wavelength range, the 1200 l\/mm grating focuses on a smaller segment of the spectrum with significantly greater detail.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1200 l\/mm Grating:\u003c\/strong\u003e Choose this for targeted studies of specific spectral lines (like H-alpha or Sodium D-lines) where maximum detail is the goal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600 l\/mm Grating (Standard):\u003c\/strong\u003e Ideal for general stellar classification and capturing broad spectral features across a wide range of wavelengths in one shot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Density Gratings (e.g., 300 l\/mm):\u003c\/strong\u003e Best for low-resolution survey work, classifying faint objects like supernovae, or capturing the entire visible spectrum of a star at once.\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 the main advantage of the Shelyak 1200 l\/mm grating over the standard 600 l\/mm grating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is \u003cstrong\u003edoubled spectral resolution\u003c\/strong\u003e. The 1200 l\/mm grating spreads light out more, allowing you to see finer details and separate spectral lines that would appear blended together with the standard 600 l\/mm grating. This is essential for detailed scientific analysis of specific spectral features.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I use a lower resolution grating instead of this 1200 l\/mm module for the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUse a lower-density grating (like the optional 300 l\/mm or 150 l\/mm) when your priority is capturing the widest possible wavelength range in a single image, or when observing very faint objects. Lower resolution concentrates the light, improving the signal-to-noise ratio for targets like quasars, comets, or faint supernovae where detailed line profiles are less critical than initial classification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 1200 l\/mm UVEX grating to study the H-alpha line of Be stars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application. The high resolution of the 1200 l\/mm grating is perfectly suited for resolving the complex and variable emission profiles of the H-alpha line in Be stars. This allows you to track changes in the star's circumstellar disk, which is a key area of pro-am collaborative research.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 1200 l\/mm grating affect the wavelength range I can capture with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 1200 l\/mm grating significantly \u003cstrong\u003enarrows the spectral range\u003c\/strong\u003e that fits onto your camera's sensor in a single exposure compared to the 600 l\/mm grating. You will be capturing a smaller slice of the spectrum, but with much greater detail within that slice. You may need to take multiple exposures, rotating the grating slightly between each, to cover a wider region of interest.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs installing the 1200 l\/mm grating module in the UVEX spectroscope difficult?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the UVEX is designed for interchangeable gratings. The modules are made to be easily swappable by the user, allowing you to change the resolution of the spectroscope in the field to match your observing target and scientific goals for the night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is best for high-resolution spectroscopy with the UVEX and the 1200 l\/mm grating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHigh-resolution spectroscopy requires a strong signal. Therefore, telescopes with larger apertures (typically 8\" or greater) are recommended to gather enough light, especially for fainter stars. Schmidt-Cassegrains (SCTs) and Ritchey-Chrétiens (RCs) are common choices due to their large apertures and comfortable back focus, which easily accommodates the spectroscope.\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\u003eGrating Density\u003c\/td\u003e\n\u003ctd\u003e1200 lines\/mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak UVEX Spectroscope\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_UVEX_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 UVEX 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":52943052538141,"sku":"SHK-SE0245","price":992.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Grating-module-for-the-UVEX-150-l-mm-1_bdc204a7-8ffd-43bd-b3b3-805d4a5ab9ff.jpg?v=1789616475"},{"product_id":"shelyak-se0246","title":"Shelyak Grating module for the UVEX - 1800 l\/mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eGrating Density: 1800 lines\/mm\u003c\/li\u003e\n\u003cli\u003eInstrument Compatibility: Shelyak UVEX Spectroscope\u003c\/li\u003e\n\u003cli\u003ePrimary Application: High-resolution spectroscopy\u003c\/li\u003e\n\u003cli\u003eModular Design: Interchangeable with other UVEX gratings\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\u003eGrating module for the UVEX - 1800 l\/mm\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Grating Module for the UVEX elevates your spectroscope's capabilities with a line density of 1800 lines per millimeter (l\/mm). This module offers three times the line count of the standard 600 l\/mm grating included with the UVEX, delivering the highest possible spectral dispersion and resolution available for the 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\u003e1800 l\/mm: The Highest Resolution for UVEX Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThis grating is a specialized tool designed for maximum detail. The high 1800 l\/mm density spreads starlight across a greater number of pixels, allowing you to resolve extremely fine spectral features that are invisible with lower-dispersion gratings. It is the ideal choice for advanced projects like measuring the Doppler shift in binary star systems, analyzing the detailed atmospheric lines of bright stars, or separating close emission lines in planetary nebulae.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this high resolution is a reduction in brightness and a narrower spectral range captured in a single exposure. This makes the 1800 l\/mm grating best suited for brighter targets where photon signal is abundant and fine detail is the primary scientific goal.\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 5-Grating UVEX Modular System\u003c\/h3\u003e\n\u003cp\u003eThe UVEX spectroscope is engineered around a modular, user-interchangeable grating system. This allows you to adapt the instrument's resolution to match your specific target and observing conditions. The 1800 l\/mm grating represents the pinnacle of this system for high-resolution work.\u003c\/p\u003e\n\u003cp\u003eYou can easily swap it with the standard 600 l\/mm grating or other optional modules, including the 150, 300, and 1200 l\/mm versions. This flexibility transforms the UVEX from a single instrument into a versatile analytical platform, capable of everything from low-resolution surveys of faint objects to high-precision analysis of bright stars.\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\u003e1800 l\/mm vs. 600 l\/mm: Choosing the Right Dispersion\u003c\/h3\u003e\n\u003cp\u003eSelecting the correct grating is critical for successful spectroscopy. The choice between the optional 1800 l\/mm module and the standard 600 l\/mm grating depends entirely on your target.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 600 l\/mm Grating:\u003c\/strong\u003e This is the workhorse for general spectroscopy. It produces brighter spectra and captures a wider range of wavelengths in one shot, making it ideal for classifying stars, observing fainter objects like supernovae, or conducting initial survey work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional 1800 l\/mm Grating:\u003c\/strong\u003e This is a specialist's tool. Use it when you have a bright target and a specific scientific question that requires resolving very fine details. It prioritizes resolution over all other factors.\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 the primary advantage of the 1800 l\/mm grating for the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is its \u003cstrong\u003ehigh spectral resolution\u003c\/strong\u003e. With 1800 lines per millimeter, it spreads light out more than any other UVEX grating, allowing you to resolve very fine, closely spaced details in a spectrum that would be blurred together at lower dispersions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen would I use the 1800 l\/mm grating to observe a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a bright A-type star like Vega, the 1800 l\/mm grating would be excellent for studying the detailed profile of its prominent hydrogen absorption lines (the Balmer series). The high resolution would allow you to detect subtle asymmetries or Doppler shifts caused by stellar rotation or other atmospheric phenomena.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes using the 1800 l\/mm grating have any disadvantages compared to the standard 600 l\/mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Because the light is spread out more, the resulting spectrum is \u003cstrong\u003edimmer\u003c\/strong\u003e and covers a \u003cstrong\u003enarrower wavelength range\u003c\/strong\u003e in a single image. This means it requires longer exposure times or brighter targets and may require taking multiple images to cover the same spectral range as the 600 l\/mm grating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow difficult is it to install the 1800 l\/mm grating module in the UVEX spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX is designed for user-swappable gratings. The process is straightforward and involves removing the access panel and carefully exchanging the modules. For detailed instructions, please refer to the main Shelyak UVEX instrument manual.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the UVEX 1800 l\/mm grating to study a faint galaxy like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is not recommended. The high dispersion of the 1800 l\/mm grating would spread the very faint light from M51 too thinly, resulting in an unusable spectrum with a very low signal-to-noise ratio. A low-dispersion grating, like the standard 600 l\/mm or optional 150 l\/mm, is required for such faint, extended objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat other gratings are available for the Shelyak UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX modular system includes a family of gratings to suit different scientific goals. In addition to the standard 600 l\/mm and this 1800 l\/mm module, Shelyak offers optional gratings of \u003cstrong\u003e150 l\/mm\u003c\/strong\u003e, \u003cstrong\u003e300 l\/mm\u003c\/strong\u003e, and \u003cstrong\u003e1200 l\/mm\u003c\/strong\u003e.\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_UVEX_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 UVEX 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":52943052800285,"sku":"SHK-SE0246","price":992.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Grating-module-for-the-UVEX-150-l-mm-1_3dc2d9fa-d61e-4483-9460-b6cf48cfa251.jpg?v=1789616483"},{"product_id":"shelyak-se0248","title":"Shelyak 530 nm UVEX order filter kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for the Shelyak Instruments UVEX Spectrograph\u003c\/li\u003e\n\u003cli\u003eSuppresses 2nd Order Near-Infrared (IR) Spectral Contamination\u003c\/li\u003e\n\u003cli\u003eEnsures Cleaner, More Accurate Spectroscopic Data\u003c\/li\u003e\n\u003cli\u003eMounts directly to the rear of the UVEX slot support\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\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\u003e530 nm UVEX order filter kit\u003c\/h2\u003e\n      \u003cp\u003eThe 530 nm UVEX order filter kit is a critical accessory for the Shelyak UVEX spectrograph, engineered to solve the specific problem of second-order spectral contamination. When observing targets with significant near-infrared (IR) emissions, this filter prevents false signals from appearing in your visible spectrum, ensuring the data you collect is clean. By suppressing this unwanted second-order light, the 530 nm filter allows for unambiguous identification of spectral features.\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\u003eEliminate Spectral Contamination: The 530nm UVEX Order Filter\u003c\/h3\u003e\n      \u003cp\u003eIn spectroscopy, a diffraction grating can produce multiple spectra, or \"orders.\" The second order of a near-IR wavelength can overlap with the first-order spectrum of a visible wavelength, creating an artifact that corrupts your data. This 530 nm order filter is designed to block this specific type of contamination, making it essential for achieving scientific-grade results with your UVEX.\u003c\/p\u003e\n      \u003cp\u003eThe filter is designed for straightforward integration, screwing directly onto the rear of the UVEX's slot support. This placement ensures it effectively filters the light path without complicating your imaging train, resulting in cleaner spectra and more reliable measurements of stellar classifications, emission lines, and other astrophysical phenomena.\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 is the primary purpose of the 530 nm UVEX order filter kit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary purpose of the 530 nm UVEX order filter is to \u003cstrong\u003esuppress the second order of the near-infrared (IR) spectrum\u003c\/strong\u003e. This prevents false spectral lines from IR sources from contaminating your visible-light spectrum, leading to cleaner and more accurate scientific data.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhen observing a Be star with my UVEX, do I need the 530 nm order filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, observing a Be star is an excellent use case for this filter. Be stars often have strong hydrogen-alpha emission in the red part of the spectrum and can have significant IR emission. Using the 530 nm filter ensures that the second-order light from this IR emission does not create artifacts in the blue-green portion of your spectrum, allowing for accurate characterization of the star's properties.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIf I'm observing the H-alpha line at 656nm with my UVEX, is this filter necessary?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhen your primary target is a red-end wavelength like H-alpha (656nm), which is above the filter's likely cutoff, this filter is generally not needed and would block the light you intend to measure. This filter is most useful when you are observing targets in the blue and green parts of the spectrum (below 530 nm) and want to eliminate contamination from IR sources.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the 530 nm UVEX order filter installed?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe filter is designed to be screwed directly onto the \u003cstrong\u003erear of the UVEX slot support\u003c\/strong\u003e. This simple and secure mounting method integrates the filter seamlessly into the spectrograph's optical path.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 530 nm UVEX filter impact the brightness or focus of my spectrum?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eLike any filter, it will cause a minor reduction in light throughput, but this is a necessary trade-off for eliminating significant spectral contamination. The impact on focus should be negligible, as it is a thin, high-quality optical component designed specifically for the UVEX system.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 530 nm order filter required for all observations with the Shelyak UVEX?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, it is not required for all observations. It is specifically needed when you are concerned about second-order contamination from near-IR sources. If you are observing targets with little to no IR emission, or if your scientific goals are not impacted by potential low-level contamination, you may not need to use it.\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_UVEX_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 UVEX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943053488413,"sku":"SHK-SE0248","price":258.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-530-nm-UVEX-order-filter-kit-1_c63b0dd0-657d-4ba4-88f8-6be4e6469bc9.jpg?v=1789616501"}],"url":"https:\/\/davidastro.com\/collections\/shelyak-uvex-spectroscopes.oembed","provider":"David Astro","version":"1.0","type":"link"}