{"product_id":"optivisor-head-mounted-magnifier-optical-glass-da2-da10","title":"Optivisors","description":"\u003cp\u003e\u003cstrong\u003eAmerica's #1 head-mounted magnifier for jewelers, watchmakers, and craftspeople.\u003c\/strong\u003e OptiVISOR is the only headband magnifier that uses \u003cstrong\u003eoptical glass prismatic lenses\u003c\/strong\u003e for superior clarity, durability, and scratch resistance. Comfortable, lightweight, and fully adjustable — can be worn over prescription glasses.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical glass prismatic lenses\u003c\/strong\u003e — unmatched clarity versus plastic alternatives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA\u003c\/strong\u003e — quality and durability trusted by professionals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable lens plates\u003c\/strong\u003e — upgrade or swap magnification in seconds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits over eyeglasses\u003c\/strong\u003e — adjustable headband designed for all-day comfort\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eLens Type\u003c\/th\u003e\n\u003ctd\u003eOptical glass prismatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadband\u003c\/th\u003e\n\u003ctd\u003eAdjustable, fits over prescription eyeglasses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLens Plates\u003c\/th\u003e\n\u003ctd\u003eInterchangeable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Higher magnification means a shorter working distance. Choose the model that matches how close you prefer to work. The number in the upper left corner of the lens plate indicates approximate diopter power. Focal length is measured from the lens plate to the work surface, not from your eyes.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eMagnification\u003c\/th\u003e\n\u003cth\u003eFocal Length (Working Distance)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.470\u003c\/td\u003e\n\u003ctd\u003eDA-2\u003c\/td\u003e\n\u003ctd\u003e1.5×\u003c\/td\u003e\n\u003ctd\u003e20\" (510 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.471\u003c\/td\u003e\n\u003ctd\u003eDA-3\u003c\/td\u003e\n\u003ctd\u003e1.75×\u003c\/td\u003e\n\u003ctd\u003e14\" (355 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.472\u003c\/td\u003e\n\u003ctd\u003eDA-4\u003c\/td\u003e\n\u003ctd\u003e2.0×\u003c\/td\u003e\n\u003ctd\u003e10\" (250 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.473\u003c\/td\u003e\n\u003ctd\u003eDA-5 \u003cstrong\u003e(Most Popular)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e2.5×\u003c\/td\u003e\n\u003ctd\u003e8\" (200 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.474\u003c\/td\u003e\n\u003ctd\u003eDA-7\u003c\/td\u003e\n\u003ctd\u003e2.75×\u003c\/td\u003e\n\u003ctd\u003e6\" (150 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.475\u003c\/td\u003e\n\u003ctd\u003eDA-10\u003c\/td\u003e\n\u003ctd\u003e3.5×\u003c\/td\u003e\n\u003ctd\u003e4\" (100 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe number in the upper left corner of each lens plate indicates its approximate diopter power.\u003c\/li\u003e\n\u003cli\u003eFocal length is measured from the \u003cem\u003elens plate\u003c\/em\u003e to the work surface, not from your eyes.\u003c\/li\u003e\n\u003cli\u003eThe DA-5 (8\" working distance) is the most popular choice among bench professionals.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Donnegan","offers":[{"title":"DA 2","offer_id":43533780943062,"sku":"129.470","price":60.15,"currency_code":"USD","in_stock":true},{"title":"DA 3","offer_id":43533780975830,"sku":"129.471","price":60.15,"currency_code":"USD","in_stock":true},{"title":"DA 4","offer_id":43533781008598,"sku":"129.472","price":60.15,"currency_code":"USD","in_stock":true},{"title":"DA 5","offer_id":43533781041366,"sku":"129.473","price":60.15,"currency_code":"USD","in_stock":true},{"title":"DA 7","offer_id":43533781074134,"sku":"129.474","price":65.25,"currency_code":"USD","in_stock":true},{"title":"DA 10","offer_id":43533781106902,"sku":"129.475","price":66.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/optivisors-otto-frei.jpg?v=1719959182","url":"https:\/\/www.ottofrei.com\/products\/optivisor-head-mounted-magnifier-optical-glass-da2-da10","provider":"Otto Frei","version":"1.0","type":"link"}