{"product_id":"metabones-canon-ef-to-micro-four-thirds-t-speed-booster-xl-064x-black-matte","title":"Metabones Canon EF to Micro Four Thirds T Speed Booster XL 0.64x (Black Matte)","description":"\u003cp\u003eA new Micro-4\/3 mount Speed Booster® adapter designed exclusively for the Panasonic GH4 and other selected Micro Four Thirds cameras (refer to the below camera compatbility table), with a magnification of 0.64x.  The Speed Booster XL 0.64x uses an advanced 6-element optical design to achieve extraordinary optical performance at apertures up to an incredible f\/0.80, a new record for Micro Four Thirds format.\u003cbr\u003e\n\n\u003cbr\u003e\n\nThe new Speed Booster XL 0.64x reduces the full-frame crop factor of the Panasonic GH4 from 2.0x to 1.28x, thus effectively transforming these cameras into APS-H format.  When the GH4 is used in Cinema 4k video mode the horizontal full frame crop factor is reduced from 2.34x to 1.50x, thus effectively transforming the GH4 into a super-35 format 4k cine camera.  In addition, the speed of any attached lens is increased by 11\/3 stops, with a maximum output aperture of f\/0.80 when an f\/1.2 lens is used.  For example, a 50mm f\/1.2 becomes a 32mm f\/0.80, which is the fastest aperture available for full size Micro Four Thirds format.\u003c\/p\u003e","brand":"Metabones","offers":[{"title":"Default Title","offer_id":47123517341924,"sku":"MB_SPEF-M43-BT3","price":374.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/4647\/2676\/files\/MB_SPEF-M43-BT3_e2267e82-9327-4868-8cfe-aaaeecf4999c.jpg?v=1764765243","url":"https:\/\/progear-website.myshopify.com\/products\/metabones-canon-ef-to-micro-four-thirds-t-speed-booster-xl-064x-black-matte","provider":"Progear-website","version":"1.0","type":"link"}