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Just got my Helios 44-2 for my M5 and Viltrox Speedbooster : r/canon
Amazon.com : NEEWER EF-EOS M Lens Mount Adapter 0.71x Autofocus Speed Booster Compatible with Canon EF Lens to EOS M Series Camera EOS M M2 M3 M5 M6 M10 M50 M100 M200
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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
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