{"product_id":"prototype-gtf-102","title":"[Prototype] GTF 102","description":"\u003cp\u003eThe GTF series evolved from the triplet GT platform by adding a two-element field-flattening group, creating a five-element optical system that does not require a separate field flattener. The series was discontinued in 2014, making this GTF 102 a particularly interesting piece from an earlier generation of William Optics design.\u003c\/p\u003e\n\u003cp\u003eThis prototype combines that classic five-element GTF optical design with a newer \u003cstrong\u003e2.5\" focuser featuring an M63 opening\u003c\/strong\u003e and an integrated \u003cstrong\u003eBahtinov mask\u003c\/strong\u003e, giving it a mix of classic character and more modern mechanical features.\u003c\/p\u003e\n\u003cp\u003eAs a development sample, this unit has a few condition and package differences:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSoft carry case not included\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMinor scratches are present on the lens surface\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA distinctive prototype that combines one of our classic discontinued optical designs with later-generation mechanical features.\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Blue","offer_id":49142380429529,"sku":"A-F102GTF-prototype","price":1398.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0675\/5752\/3673\/files\/GT-102-BU-1.jpg?v=1787552345","url":"https:\/\/tw.williamoptics.com\/products\/prototype-gtf-102","provider":"William Optics","version":"1.0","type":"link"}