{"product_id":"shelyak-se0012","title":"Shelyak Lhires III adapter set (23 mm camera)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects cameras to the Shelyak Lhires III spectroscope\u003c\/li\u003e\n\u003cli\u003eDesigned for cameras with a backfocus between 21.35 mm and 25.35 mm\u003c\/li\u003e\n\u003cli\u003eOptimized for common camera backfocus distances around 23 mm\u003c\/li\u003e\n\u003cli\u003eProvides a rigid, secure connection for precise sensor alignment\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\u003eLhires III adapter set (23 mm camera)\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Lhires III adapter set for 23 mm cameras enables you to mount a camera with a native backfocus between 21.35 mm and 25.35 mm to your Lhires III spectroscope, ensuring the sensor is positioned at the precise focal plane required for 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\u003ePrecision Mounting for Cameras with 21.35mm to 25.35mm Backfocus\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the critical link between your Lhires III spectroscope and a camera with a backfocus in the 21.35 mm to 25.35 mm range. Achieving the correct spacing is non-negotiable in spectroscopy, and this component creates a rigid, repeatable connection for accurate data acquisition.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted Compatibility:\u003c\/strong\u003e Specifically engineered for the Lhires III, this adapter solves the mounting problem for a popular class of cameras, such as those with a nominal backfocus of 23 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified Integration:\u003c\/strong\u003e By using this adapter, you eliminate the need for custom-machined parts or unstable stacks of generic extenders, securing your camera directly to the spectroscope's optical path.\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 purpose of the Lhires III adapter set for 23 mm cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter connects a camera with a specific backfocus range (21.35 mm to 25.35 mm) to a Shelyak Lhires III spectroscope. It ensures the camera sensor is placed at the correct distance from the spectroscope's optics for a sharp spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are compatible with this Lhires III adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAny camera with a native backfocus that falls between \u003cstrong\u003e21.35 mm and 25.35 mm\u003c\/strong\u003e can be used with this adapter. While the title refers to \"23 mm cameras,\" it supports the full specified range. You must confirm your camera's backfocus before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this specific Lhires III adapter for my spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need this adapter only if your imaging camera has a backfocus within the 21.35 mm to 25.35 mm range. Shelyak offers different adapters for cameras with other backfocus distances, such as standard 17.5 mm C-mount cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this Lhires III adapter ensure I get a good spectrum of a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy precisely setting the camera distance, this adapter guarantees that the light from Vega passing through the Lhires III slit and grating forms a sharply focused spectrum on your sensor. Incorrect spacing would result in blurred spectral lines, making it impossible to measure features like the Balmer absorption lines accurately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Lhires III adapter with a standard DSLR on my f\/8 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is highly unlikely. Most DSLRs have a much longer backfocus (typically 44 mm for Canon EF or 46.5 mm for Nikon F-mount) and would not be compatible with this adapter. This adapter is designed for dedicated astronomy cameras that fall within the 21.35 mm to 25.35 mm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this adapter difficult to install on the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward. The adapter is designed to thread or bolt directly onto the Lhires III's camera port, providing a secure mechanical and optical interface for your camera.\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\u003eCompatible Spectroscope\u003c\/td\u003e\n\u003ctd\u003eShelyak Lhires III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e21.35 mm to 25.35 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\"\u003eLhires III adapter set (23 mm camera)\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\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":52943043952925,"sku":"SHK-SE0012","price":124.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Lhires-III-adapter-set-23-mm-camera-1_6e4d4cf1-fcda-4c9a-816a-590b4451e658.jpg?v=1789616236","url":"https:\/\/davidastro.com\/en-us\/products\/shelyak-se0012","provider":"David Astro","version":"1.0","type":"link"}