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Amazon.com : Metabones Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four Thirds-Mount Cameras : Electronics
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SIGMA Surprises: A crop SIGMA 30mm f/1.4 Art lens on full-frame. Simply put I did not expect this to work at all. – Eric L. Woods
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Metabones Speed Booster adapter gives lenses an extra f/stop and nearly full frame focal lengths on APS-C sensors - Newsshooter
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Lens adapter to give full frame perspective on crop sensor cameras? -- Canon Lenses in photography-on-the.net forums
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