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Metabones®
Venus Optics will soon announce the new 0,7x “speedbooster” – 43 Rumors
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Metabones®
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Adapting lenses to Micro Four Thirds - Beginner's Guide and TIPS — Micro Four Nerds
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Amazon.com : Pixco Lens Kit Speed Booster Focal Reducer Lens Adapter Suit for M42 F Lens to Canon EOS M Camera+39mm-42mm Step-up Metal Filter Adapter Ring / 39mm Lens to 42mm Accessory (
