{"product_id":"tele-vue-20x-2-big-barlow-bwc-2211","title":"Tele Vue 2.0x 2\" BIG Barlow (BWC-2211)","description":"\u003ch2\u003eTele Vue 2.0x 2\" BIG Barlow\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue 2.0x 2″ BIG Barlow is ideal for Newtonian scope owners. It will be parfocal with both 2″ and 1¼” eyepieces in this application. Features include 1¼” eyepiece adapter, threads for 48mm filters, captive lock screw and full multi-coatings.\u003c\/p\u003e\n\u003cp\u003eNote: The Big Barlow is\u003cspan\u003e \u003c\/span\u003e\u003cu\u003enot\u003c\/u\u003e\u003cspan\u003e \u003c\/span\u003erecommended for use with 2″ diagonals because it’s length prevents it from being parfocal. With some telescopes, focus might not be reached, particularly when the interface lens is also used with it. A far better approach with no potential problems in any scope or with any eyepieces is to use the 2″ 2x Powermate (PMT-2200). See the\u003cspan\u003e \u003c\/span\u003ePowermates\u003cspan\u003e \u003c\/span\u003epage for a discussion of Powermates vs. Barlows.\u003c\/p\u003e\n\u003ch4 class=\"fs_italic\"\u003e\u003cem\u003e\u003cstrong\u003eConcept\u003c\/strong\u003e\u003c\/em\u003e\u003c\/h4\u003e\n\u003cblockquote\u003e\n\u003cp class=\"fs_italic\"\u003e\u003cem\u003e\"I originally designed the Tele Vue Barlow line to complement the high performance of our eyepieces. Only 2 elements of high index glass were required to reduce all aberrations to well below the airy disc in an f\/4 system. It has taken a good 15 years, but I think we’re finally laying to rest the popular myth of the “degrading Barlow.” In a 1997 Sky \u0026amp; Telescope review, Terrence Dickenson wrote “…Technology has erased the old objections. A modern Barlow will not degrade your telescope’s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler eyepieces and their clones have built-in Barlows – ample evidence that the lens is not some detrimental intruder.” Thanks Terry, I couldn’t agree more.\"\u003c\/em\u003e \u003cstrong\u003e— Al Nagler\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp\u003eProperly designed Barlows do wonderful things: They amplify power, slow the telescope’s f\/# (improving eyepiece sharpness), and give designers the opportunity to compensate for eyepiece aberrations.\u003c\/p\u003e\n\u003cp\u003eTele Vue Barlows use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f\/4 scopes. They even improve our competitor’s eyepieces and telescopes!\u003c\/p\u003e\n\u003ch4 class=\"pageSectionTitle\"\u003eTele Vue Quality\u003c\/h4\u003e\n\u003cp\u003eCompromise image quality in any part of the optical chain and you’ve compromised every part! Tele Vue product design and execution deliver consummate satisfaction. Every Tele Vue Barlow must pass the same rigorous f\/4, full field testing as all our eyepieces.\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eAll Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories.\u003c\/b\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cem\u003e \u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" id=\"tab-local_1\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_1\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eMagnification: 2x\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBarrel: 2″\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWeight: 0.75 lbs\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\"\u003e\n\u003cp\u003e\u003cspan\u003e2″ BIG Barlow\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp\u003eTele Vue Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":49092755751012,"sku":"ojk1787937233825","price":194.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/9705\/7380\/files\/tele-vue-20x-2-big-barlow-bwc-2211_1.png?v=1787937240","url":"https:\/\/www.morningmerchant.shop\/products\/tele-vue-20x-2-big-barlow-bwc-2211","provider":"My Store","version":"1.0","type":"link"}