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Viltrox Ef-r3 Auto Focus Speed Booster Full Frame Lens Adapter For Canon Eos Ef To Eos R Camera R R6 Rp R5 C70 Red Komodo S35 - Lens Adapter - AliExpress
Amazon.com : VILTROX Lens Adapter Speed Booster EF-M2 II AF Focal Reducer Booster Adapter 0.71x Compatible with Canon EF Mount Lens to M4/3 Camera GH4 GH5 GF9 GX85 E-M5 E-M10 E-M10II E-PL5 :
Midwest Photo Metabones Nikon G/F to BMCC Speed Booster 0.64x
Metabones®
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Canon EF to Micro 4/3 Four Thirds Speed Booster - Rule Boston Camera
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Metabones T Speed Booster XL 0.64x Adapter for Canon EF Lens to BMPCC – Voice and Video Sales
Blackmagic Pocket Cinema Camera 4K With Metabones Speed Booster Adapter CINECAMPOCHDMFT4K G
Amazon.com : VILTROX EF-EOS M2 Speed Booster 0.71x Auto Focus Lens Mont Adapter for Canon EF Mount Lens to Canon EF-M Mount Mirrorless Camera EOS M M2 M3 M5 M6 M10 M50
Dodd Camera - METABONES Canon EF to Sony E .71X T Speed Booster #OPENBOX