{"product_id":"metabones-canon-ef-to-canon-efr-t-speed-booster-ultra-0-71x-adapter-black-with-tripod-foot-eos-r-1","title":"Metabones Canon EF to Canon EFR T Speed Booster ULTRA 0.71x Adapter (Black) - With Tripod Foot (EOS R)","description":"\u003cp\u003eSKU: MB-201\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"markdown markdown-main-panel enable-luminous-fast-follows enable-updated-hr-color stronger tutor-markdown-rendering\" id=\"model-response-message-contentr_17bec79cd54bc5e5\" aria-busy=\"false\" aria-live=\"polite\" dir=\"ltr\"\u003e\n\u003cp data-path-to-node=\"0\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"2\"\u003eCanon EF Lens to RF-mount T Speed Booster ULTRA 0.71x — Cinema-Grade Full-Frame Optics on Super35 Sensors\u003c\/h3\u003e\n\u003cp data-path-to-node=\"3\" id=\"p-rc_e6855cb95d8059a3-57\"\u003e\u003cspan class=\"citation-109 citation-end-109\"\u003eThis professional-grade optical adapter converts full-frame Canon EF-mount lenses for use on Canon RF-mount cameras, reducing the crop factor by 0.71x while increasing the maximum aperture by a full stop.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"4\"\u003eMaximizing Commercial Production Value\u003c\/h2\u003e\n\u003cp data-path-to-node=\"5\" id=\"p-rc_e6855cb95d8059a3-58\"\u003eIn high-stakes commercial environments, visual consistency across multi-camera setups is paramount. \u003cspan class=\"citation-108 citation-end-108\"\u003eThis adapter leverages an advanced 5-element in 4-group optical path engineered by Caldwell Photographic, incorporating ultra-high index tantalum-based glass.\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-107 citation-end-107\"\u003eThis exotic configuration ensures maximum modulation transfer function metrics, drastically reducing the edge distortion and peripheral vignetting that can compromise adapted glass.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-106 citation-end-106\"\u003eBy transforming standard f\/2.8 zooms into high-speed f\/2.0 assets, production houses can extract peak performance from existing lens investments while maintaining pristine corner-to-corner resolution for discerning clients.\u003csup class=\"superscript\" data-turn-source-index=\"4\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\" id=\"p-rc_e6855cb95d8059a3-59\"\u003eFurthermore, seamless integration into modern cinema ecosystems is guaranteed via rigorous electronic translation. The hardware facilitates uninterrupted communication between the lens and advanced camera systems such as the Canon EOS C70, RED KOMODO 6K, and RED KOMODO-X. \u003cspan class=\"citation-105 citation-end-105\"\u003eDual-pixel autofocus tracking and internal image stabilization protocols operate with absolute fidelity, providing operators with the rock-solid reliability needed for fast-paced commercial workflows where a single missed focus pull can compromise an entire day's production budget.\u003csup class=\"superscript\" data-turn-source-index=\"5\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\" id=\"p-rc_e6855cb95d8059a3-60\"\u003e\u003cspan class=\"citation-104 citation-end-104\"\u003eThe structural housing matches this electronic precision, utilizing precision-machined aluminum alloy and brass elements finished with chromium plating.\u003csup class=\"superscript\" data-turn-source-index=\"6\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e An interior flocked treatment absorbs stray light rays to mitigate internal reflections, preserving native lens contrast under intense studio lighting arrays. A robust rubber gasket at the mount interface safeguards the electronic connections against environmental ingress, ensuring stable, uninterrupted operation during demanding commercial shooting schedules. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"8\"\u003eCritical Performance Benchmarks\u003c\/h2\u003e\n\u003cul data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eOptical Magnification:\u003c\/b\u003e 0.71x\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,1,0\" id=\"p-rc_e6855cb95d8059a3-61\"\u003e\u003cspan class=\"citation-103\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-103\"\u003eAperture Gain:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-103 citation-end-103\"\u003e Increases maximum lens aperture by 1 stop (up to a maximum output of f\/0.9)\u003csup class=\"superscript\" data-turn-source-index=\"7\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,2,0\" id=\"p-rc_e6855cb95d8059a3-62\"\u003e\u003cspan class=\"citation-102\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-102\"\u003eOptical Construction:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-102 citation-end-102\"\u003e 5 elements in 4 groups utilizing ultra-high index tantalum-based optical glass\u003csup class=\"superscript\" data-turn-source-index=\"8\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,3,0\" id=\"p-rc_e6855cb95d8059a3-63\"\u003e\u003cspan class=\"citation-101\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-101\"\u003eCamera Mount Compatibility:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-101 citation-end-101\"\u003e Canon RF-mount (specifically optimized for APS-C \/ Super35 formats like EOS C70, RED KOMODO 6K, KOMODO-X, and full-frame bodies in crop mode)\u003csup class=\"superscript\" data-turn-source-index=\"9\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,4,0\" id=\"p-rc_e6855cb95d8059a3-64\"\u003e\u003cspan class=\"citation-100\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,4,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-100\"\u003eLens Mount Compatibility:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-100 citation-end-100\"\u003e Canon EF-mount full-frame lenses (not compatible with EF-S or third-party APS-C lenses)\u003csup class=\"superscript\" data-turn-source-index=\"10\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,5,0\" id=\"p-rc_e6855cb95d8059a3-65\"\u003e\u003cspan class=\"citation-99\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,5,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-99\"\u003eElectronic Integration:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-99 citation-end-99\"\u003e Supports Dual-Pixel Autofocus (DPAF), Video AF, Image Stabilization (IS), and cinema lens control (e.g., Canon CN-E 18-80mm T4.4 L)\u003csup class=\"superscript\" data-turn-source-index=\"11\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,6,0\" id=\"p-rc_e6855cb95d8059a3-66\"\u003e\u003cb data-path-to-node=\"9,6,0\" data-index-in-node=\"0\"\u003eEXIF Metadata Capture:\u003c\/b\u003e\u003cspan class=\"citation-98 citation-end-98\"\u003e Generates real-time focal length, aperture, and lens identification metadata\u003csup class=\"superscript\" data-turn-source-index=\"12\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,7,0\" id=\"p-rc_e6855cb95d8059a3-67\"\u003e\u003cb data-path-to-node=\"9,7,0\" data-index-in-node=\"0\"\u003eControl Interface:\u003c\/b\u003e\u003cspan class=\"citation-97 citation-end-97\"\u003e Built-in multi-function programmable Control Wheel (rotary and push-in selection) for assignable parameters such as aperture, ISO, or shutter speed\u003csup class=\"superscript\" data-turn-source-index=\"13\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,8,0\" id=\"p-rc_e6855cb95d8059a3-68\"\u003e\u003cb data-path-to-node=\"9,8,0\" data-index-in-node=\"0\"\u003eInternal Reflection Management:\u003c\/b\u003e\u003cspan class=\"citation-96 citation-end-96\"\u003e Deep internal flocking to minimize glare and maximize contrast\u003csup class=\"superscript\" data-turn-source-index=\"14\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,9,0\" id=\"p-rc_e6855cb95d8059a3-69\"\u003e\u003cb data-path-to-node=\"9,9,0\" data-index-in-node=\"0\"\u003eWeather Sealing:\u003c\/b\u003e\u003cspan class=\"citation-95 citation-end-95\"\u003e Integrated rubber gasket at the camera-side RF mount interface\u003csup class=\"superscript\" data-turn-source-index=\"15\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,10,0\"\u003e\u003cb data-path-to-node=\"9,10,0\" data-index-in-node=\"0\"\u003eMechanical Build:\u003c\/b\u003e Heavy-duty aluminum alloy and brass construction with durable chromium plating and a premium satin exterior finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,11,0\" id=\"p-rc_e6855cb95d8059a3-70\"\u003e\u003cb data-path-to-node=\"9,11,0\" data-index-in-node=\"0\"\u003eTripod Support:\u003c\/b\u003e\u003cspan class=\"citation-94 citation-end-94\"\u003e Detachable footprint compatible with Arca-Swiss, Markins, and Photo Clam ball head quick-release systems\u003csup class=\"superscript\" data-turn-source-index=\"16\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,12,0\" id=\"p-rc_e6855cb95d8059a3-71\"\u003e\u003cspan class=\"citation-93\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,12,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-93\"\u003ePower Delivery:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-93 citation-end-93\"\u003e Maintained directly via the host camera body interface; no external auxiliary power source required for standard operation\u003csup class=\"superscript\" data-turn-source-index=\"17\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,13,0\" id=\"p-rc_e6855cb95d8059a3-72\"\u003e\u003cb data-path-to-node=\"9,13,0\" data-index-in-node=\"0\"\u003eDimensions:\u003c\/b\u003e\u003cspan class=\"citation-92 citation-end-92\"\u003e 28.1 x 73.0 x 77.2 mm\u003csup class=\"superscript\" data-turn-source-index=\"18\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,14,0\" id=\"p-rc_e6855cb95d8059a3-73\"\u003e\u003cspan class=\"citation-91\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,14,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-91\"\u003eWeight:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-91 citation-end-91\"\u003e 198 grams\u003csup class=\"superscript\" data-turn-source-index=\"19\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-path-to-node=\"10\"\u003eIntegration \u0026amp; Deployment FAQ\u003c\/h2\u003e\n\u003cp data-path-to-node=\"11\" id=\"p-rc_e6855cb95d8059a3-74\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eQ: How does this adapter assist in matching color and contrast characteristics in a multi-camera commercial studio environment?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"11\" id=\"p-rc_e6855cb95d8059a3-74\"\u003e\u003cspan class=\"citation-90 citation-end-90\"\u003eA: The optical element incorporates specialized coatings and tantalum glass elements designed to remain completely neutral across the visible spectrum.\u003csup class=\"superscript\" data-turn-source-index=\"20\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Because it does not induce color shifting, the baseline color metrics of your EF-mount glass are preserved identically. This prevents color imbalances when mixing adapted lenses alongside native RF glass on an identical sensor matrix. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eQ: Can this system be deployed safely with specialized cinema lenses like the Canon CN-E servo zoom series?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eA: Yes. The electronic firmware maps the communication lines perfectly to support advanced cinema setups like the CN-E 18-80mm T4.4 L servo zoom when mounted on compatible cinema bodies. Servo zoom controls, electronic iris mapping, and comprehensive metadata logging flow smoothly through the internal data pipeline.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\" id=\"p-rc_e6855cb95d8059a3-75\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eQ: Is there a built-in mechanism to handle metadata management when employing vintage mechanical manual lenses?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\" id=\"p-rc_e6855cb95d8059a3-75\"\u003e\u003cspan class=\"citation-89 citation-end-89\"\u003eA: The hardware features an integrated chip emulation function capable of storing specific lens identification, focal length, and aperture profiles for a completely passive manual lens.\u003csup class=\"superscript\" data-turn-source-index=\"21\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-88 citation-end-88\"\u003eThis profile can be customized via desktop application tools and toggled on set by depressing the integrated multi-function control wheel.\u003csup class=\"superscript\" data-turn-source-index=\"22\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003e\u003cb data-path-to-node=\"14\" data-index-in-node=\"0\"\u003eQ: What operational step must be taken regarding in-camera software lens corrections during configuration?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003eA: Because the optical elements reshape the image circle to maximize illumination and sharpness, native digital aberration corrections within the camera menu must be disabled. The adapter passes an internal protocol instructing the camera to turn off automatic peripheral illumination and chromatic aberration corrections to prevent artificial digital artifacting over the optically optimized image.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metabones","offers":[{"title":"Default Title","offer_id":46119296794810,"sku":"MB_SPEF-EFR-BT1","price":990.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/7218\/6554\/files\/MB-201_01.jpg?v=1783480330","url":"https:\/\/dragonimage.com.au\/products\/metabones-canon-ef-to-canon-efr-t-speed-booster-ultra-0-71x-adapter-black-with-tripod-foot-eos-r-1","provider":"Dragon Image Pty Ltd","version":"1.0","type":"link"}