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Amazon.com : Fotodiox Pro Lens Mount Adapter - M42 Screw Mount SLR Lens to Pentax K (PK) Mount SLR Camera Body : Electronics
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M42 Screw Mount SLR Lens to Pentax K (PK) Mount SLR Camera Body Pro Mount Adapter – Fotodiox, Inc. USA
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M42 Lens to for Pentax PK K Mount Adapter Ring for K 01 K5 K7 K100 K200 KR KX K7 KM Camera|Lens Adapter| - AliExpress
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Amazon.com : Fotodiox Lens Mount Adapter (Blk), M42 Lens (42mm thread Mount) Lens to Pentax (PK) Camera, fits Pentax *ist DS, DS2, D, DL, DL2, K10D, K20D, K100D, K110D, K200D, K100D Super,
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