{"product_id":"optivisor-head-mounted-magnifier-optical-glass-da2-da10","title":"Optivisors","description":"\u003cp\u003eAn OptiVISOR magnifies close bench work such as stone setting, engraving, and watch repair while leaving both hands free. \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. It is comfortable, lightweight, fully adjustable, can be worn over prescription glasses, and is made in the USA.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical glass prismatic lenses\u003c\/strong\u003e for clarity unmatched by plastic alternatives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA\u003c\/strong\u003e, with quality and durability trusted by professionals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable lens plates\u003c\/strong\u003e that upgrade or swap magnification in seconds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits over eyeglasses\u003c\/strong\u003e, with an adjustable headband designed for all-day comfort\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable Options\u003c\/h3\u003e\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\u003e1.5X\u003c\/td\u003e\n\u003ctd\u003e20 in (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\u003e1.75X\u003c\/td\u003e\n\u003ctd\u003e14 in (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\u003e2.0X\u003c\/td\u003e\n\u003ctd\u003e10 in (250 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e129.473\u003c\/td\u003e\n\u003ctd\u003eDA 5\u003c\/td\u003e\n\u003ctd\u003e2.5X\u003c\/td\u003e\n\u003ctd\u003e8 in (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\u003e2.75X\u003c\/td\u003e\n\u003ctd\u003e6 in (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\u003e3.5X\u003c\/td\u003e\n\u003ctd\u003e4 in (100 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHigher magnification means a shorter working distance, so choose the model that matches how close you prefer to work.\u003c\/li\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, at an 8 in 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\/ja\/products\/optivisor-head-mounted-magnifier-optical-glass-da2-da10","provider":"Otto Frei","version":"1.0","type":"link"}