{"product_id":"shelyak-es0036","title":"Shelyak Optical kit for Sol’Ex spectroheliograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBuild a high-resolution solar spectroheliograph\u003c\/li\u003e\n\u003cli\u003eAchieves 0.03 nm resolution at 650 nm\u003c\/li\u003e\n\u003cli\u003eTunable across the 400 nm to 700 nm visible spectrum\u003c\/li\u003e\n\u003cli\u003eInternal optical reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eBased on the open-source Sol'Ex project by Christian Buil\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\u003eOptical kit for Sol’Ex spectroheliograph\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the core components to build your own Sol'Ex, an instrument capable of achieving an incredible 0.03 nm resolution for solar imaging. The system operates across the entire visible spectrum from 400 nm to 700 nm, utilizing an internal reduction ratio of 125:80 designed for the 3D-printed instrument body. With this kit, you can construct a spectroheliograph that reveals the Sun's chromosphere with contrast far exceeding that of standard commercial filters.\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\u003eUnlocking the Chromosphere with 0.03 nm Resolution\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of the Sol'Ex is its spectral resolving power. This kit enables a resolution of 0.03 nm (equivalent to 0.3 Ångströms), an extremely narrow bandpass that isolates specific spectral lines with exceptional purity. This allows you to produce high-contrast images of chromospheric features like filaments, prominences, and plage that are often washed out by broader, more common solar filters.\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\u003eA 400 nm to 700 nm Window on Solar Activity\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed-wavelength filters, the Sol'Ex design allows you to image the Sun at any wavelength within the 400 nm to 700 nm range. You are not limited to just Hydrogen-alpha; you can capture images in Sodium (Na D), Helium (He D3), Hydrogen-beta, and more, revealing different layers and activity in the solar atmosphere. The instrument works as a spectroheliograph, scanning the solar disk and using the included software to reconstruct a detailed monochromatic image.\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\u003eA 125:80 Optical Core for the Sol'Ex and Star'Ex Projects\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential optics—slit, grating, lenses—to serve as the heart of your 3D-printed Sol'Ex. The 125:80 internal reduction ratio is specified for the build files developed by Christian Buil, ensuring compatibility. Please note that this is a DIY project; you must source the 3D-printed parts and other components like cameras and adapters separately. For those interested in stellar science, this same optical core can be converted into a high-resolution stellar spectrograph, Star'Ex, with a complementary optical kit.\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 else do I need to build a complete Sol'Ex with this optical kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical components\u003c\/strong\u003e. To complete the Sol'Ex, you will need to source the 3D-printed housing parts (STL files are available on the Sol'Ex project website) and other hardware, including an imaging camera, a guiding camera, and telescope adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is required for the Sol'Ex spectroheliograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex is designed to be mounted on a small telescope. To see the entire solar disk in a single image scan, a telescope with a focal length of \u003cstrong\u003e450mm or less\u003c\/strong\u003e is recommended. Using a telescope with a longer focal length is possible and will yield more detailed images of specific regions on the Sun, but you will not capture the full disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Sol'Ex's 0.03 nm resolution compare to a standard H-alpha filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.03 nm (0.3 Å)\u003c\/strong\u003e resolution of the Sol'Ex is significantly narrower than most commercially available solar filters. For comparison, many high-end amateur H-alpha filters have a bandpass of 0.05 nm to 0.07 nm (0.5 Å to 0.7 Å). This narrower bandpass is what allows the Sol'Ex to produce images with superior contrast on fine chromospheric details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I image prominences in H-alpha with the Sol'Ex optical kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Once you build the Sol'Ex and tune it to the Hydrogen-alpha wavelength (656.3 nm), its high resolution and contrast are ideal for capturing detailed images of solar prominences against the dark sky, as well as filaments on the solar disk itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it difficult to process the images from the Sol'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex project includes dedicated software designed for automatic image processing. The instrument captures data by scanning the Sun, and the software then reconstructs the final, high-contrast monochromatic image from this data, making the process straightforward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I upgrade my Sol'Ex to a Star'Ex for stellar spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex is designed to be convertible into a stellar spectrograph called Star'Ex. This requires a few additional optical elements, which are available in a separate complementary kit (Star’Ex HR complementary kit). This allows you to use the same core instrument to analyze the spectra of stars.\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\u003eResolution at 650 nm\u003c\/td\u003e\n\u003ctd\u003e0.03 nm (with 10 micron slit width)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e125:80\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:\/\/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\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":52943033106717,"sku":"SHK-ES0036","price":593.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Sol-Ex-spectroheliograph-1_3515680a-873c-40f7-b32c-8a320113d37f.jpg?v=1789615989","url":"https:\/\/davidastro.com\/fr\/products\/shelyak-es0036","provider":"David Astro","version":"1.0","type":"link"}