{"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":719.0,"currency_code":"USD","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","url":"https:\/\/davidastro.com\/en-us\/products\/shelyak-se0245","provider":"David Astro","version":"1.0","type":"link"}