{"product_id":"shelyak-se0247","title":"Shelyak High Performance 23µm Slit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e23µm Slit Width\u003c\/li\u003e\n\u003cli\u003eOver 90% Reflectivity\u003c\/li\u003e\n\u003cli\u003eProtected Aluminum Coating\u003c\/li\u003e\n\u003cli\u003e350-800nm Anti-Reflection Coating\u003c\/li\u003e\n\u003cli\u003eCompatible with ALPY 600 \u0026amp; UVEX Spectroscopes\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\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 High Performance 23µm Slit\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak High Performance 23µm Slit replaces standard spectroscope slits with a protected aluminum coating that achieves over 90% reflectivity, a significant increase over the ~50% rate of typical chrome slits. Its anti-reflection treatment is extended to cover the 350-800nm spectral range, making it a critical upgrade for Shelyak ALPY 600 and UVEX spectroscopes.\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\u003eProtected Aluminum Coating: Over 90% Reflectivity\u003c\/h3\u003e\n\u003cp\u003eBy using a protected aluminum coating, this 23µm slit achieves a reflection rate of over 90%. This nearly doubles the light reflected to your guide camera compared to standard chrome slits, which typically reflect only around 50% of the light, leading to more stable and accurate guiding.\u003c\/p\u003e\n\u003cp\u003eThis slit also features a larger reflective surface, which is particularly beneficial when using guide cameras with larger sensors, such as the IMX174, with an Alpy guiding module, ensuring full illumination of 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\u003e350-800nm AR Coating for UVEX \u0026amp; ALPY 600\u003c\/h3\u003e\n\u003cp\u003eThe anti-reflection treatment has been optimized for a broad 350-800nm spectral range. This enhancement is especially critical for the UVEX spectroscope, allowing you to maintain high signal-to-noise across its entire operational range, from the near-ultraviolet to the near-infrared.\u003c\/p\u003e\n\u003cp\u003eThis slit is a direct-fit upgrade for both the Shelyak ALPY 600 and UVEX spectroscopes. It is the recommended slit for any UVEX user seeking to maximize instrument throughput and scientific output.\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 Shelyak High Performance 23µm Slit over a standard one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is its reflectivity of \u003cstrong\u003eover 90%\u003c\/strong\u003e from its protected aluminum coating, compared to ~50% for standard chrome slits. This sends significantly more light to your guide camera, improving guiding accuracy on fainter stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI use a Shelyak UVEX spectroscope to study Be stars. Is this 23µm slit a good choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is highly recommended for the UVEX. Its extended \u003cstrong\u003eanti-reflection coating (350-800nm)\u003c\/strong\u003e ensures maximum light throughput across the UVEX's wide spectral range, which is ideal for capturing both the Balmer lines in the visible and other features toward the UV and NIR ends of the spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the High Performance 23µm Slit work with my ALPY 600 and an IMX174 guide camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The slit is fully compatible with the \u003cstrong\u003eALPY 600\u003c\/strong\u003e. It also features a larger reflective surface specifically to better accommodate larger sensors like the IMX174, ensuring the guide star is not vignetted.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat material is the coating on the High Performance 23µm Slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit features a \u003cstrong\u003eprotected aluminum\u003c\/strong\u003e coating. This material provides the high reflectivity (\u0026gt;90%) and durability required for spectrographic applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 23µm High Performance Slit compatible with other spectroscopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis slit is specifically designed and confirmed to be compatible with the \u003cstrong\u003eShelyak ALPY 600\u003c\/strong\u003e and \u003cstrong\u003eShelyak UVEX\u003c\/strong\u003e spectroscopes. Compatibility with other models is not guaranteed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the anti-reflection coating on the High Performance 23µm Slit important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe anti-reflection coating minimizes light loss as it passes through the slit into the spectroscope. By extending this coating to cover \u003cstrong\u003e350-800nm\u003c\/strong\u003e, the slit ensures that more photons from your target reach the science camera, improving the signal-to-noise ratio of your final spectrum.\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\u003e23µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eProtected Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflectivity\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti-Reflection Range\u003c\/td\u003e\n\u003ctd\u003e350-800nm\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\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\"\u003eHigh Performance Slit 23µm\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\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":52943053062429,"sku":"SHK-SE0247","price":499.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-High-performance-slit-23-m-1_1cd135c0-60a7-4666-9974-c8af022f25de.jpg?v=1789616492","url":"https:\/\/davidastro.com\/products\/shelyak-se0247","provider":"David Astro","version":"1.0","type":"link"}