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Metabones®
GEAR REVIEW: The Metabones Speed Booster for that Full-Frame Look Pt1
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EF-R3 Autofocus 0.71x Speed Booster Obiettivo Adattatore Compatibile con Canon EF Obiettivo a Canon EOS R R5 R6 RP C70 Fotocamera : Amazon.it: Elettronica
First Impressions: Metabones Speed Booster: Digital Photography Review
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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
