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Amazon.com : Fotodiox Rear Lens Cap for Contax/Yashica (also known as c/y mount) lenses, fits Contax RTS, II, III, 139, 137, 159, 167, ST, Aria, AX, RX, Yashica FX-1. FX-2,FX-3, FX-3 Super,
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Amazon.com : Fotodiox Lens Mount Adapter, M42 (42mm x1 Thread Screw) Lens to Contax Yashica c/y Mount Camera for Contax 167MT, RTS II, III, Yashica FX-3 2000 : Electronics
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