Nikon F/G focal reducer speed booster adapter Canon EOS-M EOSM M6 M3 M5 M10 M100 | eBay
Sample review of our focal reducer by Joseph Moore. new version Focal reducer/Speed booster adapter. reduce the focal length (by 0.72x wider). 50mm lens on NEX with the adpater, eff. focal length is 50mm x 1.5(crop) x 0.72 = 54mm. | eBay!