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Metabones Speed Booster Adapter with Support Foot for Canon EF-Mount Lens to Sony E-Mount (MB_SPEF-E-BM1) at KEH Camera
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Metabones T CINE Speed Booster ULTRA 0.71x (5th Generation) - Canon EF to Sony E-Mount Adapter | Lens / Mount Adapters | Lenses / Accessories | Buy | AbelCine
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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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EDIT: Now with new "Bokeh Circles" tests....An adaptor which claims to make your lens, faster, wider and better! This is NOT an April Fool's! | Philip Bloom- Blog
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