... , Mamiya, Zenit) PENTAX CAMERA: *ist D, *ist DL, *ist Ds, *istDL2, K100 Introduction:M42 to all Pentax PK mount adapter ring. Make M42 ... mount lenses (Zeiss, Pentax, Praktica, Mamiya, Zenit) can be ... NIKON G-EOSWTY-A-109 W-TIANYA adapter ring Pentax M42 42mm to PK K Mount Adapter Infinity focus for K20D K100D K200D ...