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Pentax Adapter K for 645 Lens (645 to K mount) Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Lens Database
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Amazon.com : Fotodiox Pro Lens Mount Adapter - Compatible with Pentax 645 (P645) Mount SLR Lenses to Arri LPL (Large Positive Lock) Mount Cameras : Electronics
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