Viltrox C/Y-E Focal Reducer Speed Booster Adapter for Contax Yashica C/Y Lens to Sony E NEX A7 II A7R A7S A6300 A6000 NEX-7/6 viltrox ef e auto focus reducer speed booster lens adapter for canon ef eos lens to sony camera nex 7 a9 a7 ii a7rii a7sii a6500