{"product_id":"shelyak-se0128","title":"Shelyak Alpy Barlow Lens for Alpy 600 Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables DSLR camera use with Alpy 600 spectroscope\u003c\/li\u003e\n\u003cli\u003eIncreases available backfocus for long imaging trains\u003c\/li\u003e\n\u003cli\u003eAccommodates cameras with integrated filter wheels\u003c\/li\u003e\n\u003cli\u003eScrews directly to the rear of the ALPY 600\u003c\/li\u003e\n\u003cli\u003eCorrects focus for cameras with standard T-ring spacing\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 Alpy Barlow Lens for Alpy 600 Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThis dedicated Barlow lens is the essential component for connecting a DSLR or a camera with a long backfocus requirement to the Shelyak Alpy 600 spectroscope. It solves the critical problem of insufficient backfocus, extending the focal plane to meet the standard spacing of DSLRs with T-rings and astronomy cameras equipped with filter wheels. By screwing directly onto the rear of the Alpy 600, it makes it possible to achieve a sharp, focused spectrum with imaging systems that would otherwise be incompatible.\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 Essential Adapter for DSLR Spectroscopy with Alpy 600\u003c\/h3\u003e\n\u003cp\u003eThe standard Alpy 600 has a very short backfocus distance, designed for compact, dedicated astronomy cameras. This Barlow lens modifies the optical path to significantly increase that distance, specifically to accommodate the deeper sensor position found in DSLR and mirrorless cameras. If you want to use your existing digital camera for spectroscopy, this lens is not optional—it is the required adapter to bring your camera to focus.\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\u003eAccommodating Filter Wheels and Long Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eModern imaging setups often include accessories like filter wheels or off-axis guiders that add considerable length to the imaging train. This Barlow provides the necessary focal extension to accommodate these bulkier configurations. It ensures you can integrate your preferred camera and accessories with the Alpy 600 without being limited by its native backfocus, giving you the flexibility to use your primary imaging rig for scientific analysis.\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 Shelyak Alpy Barlow Lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts sole purpose is to \u003cstrong\u003eincrease the backfocus\u003c\/strong\u003e of the Shelyak Alpy 600 spectroscope. This allows you to achieve focus with cameras that have a long backfocus distance, such as DSLR cameras or astronomy cameras used with a filter wheel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this Barlow to use my Canon or Nikon DSLR with the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. A standard DSLR camera's sensor is located too far from the mounting flange to reach focus on a native Alpy 600. This Barlow lens is required to extend the focal point to where your DSLR sensor can capture a sharp spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Barlow help if I use a ZWO filter wheel with my camera on the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Adding a filter wheel to your imaging train increases the required backfocus beyond what the standard Alpy 600 provides. This Barlow lens provides the necessary additional spacing to bring your camera and filter wheel combination to focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Alpy Barlow Lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward. The Barlow element is designed to be screwed directly onto the rear of the Alpy 600 unit, where you would normally attach your camera adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Barlow compatible with any other spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is a dedicated optical component designed specifically for the Shelyak Alpy 600. It is not a general-purpose Barlow and is not intended for use with other instruments or for visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this Barlow lens change the resolution of the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAs a Barlow lens, it increases the effective focal length of the system. This will change the image scale on your sensor, but it is designed to work with the Alpy 600's native resolution and optical design to produce a usable spectrum with longer backfocus cameras.\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 colspan=\"2\" style=\"text-align:center;\"\u003eNo specifications provided.\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-full\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eNo items were listed in the box for this product.\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":52943047262493,"sku":"SHK-SE0128","price":205.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Barlow-lens-1_a57ee582-85e9-4edd-8090-b7ec863f89c6.jpg?v=1789616317","url":"https:\/\/davidastro.com\/products\/shelyak-se0128","provider":"David Astro","version":"1.0","type":"link"}