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Pentax HD PENTAX-D FA 15-30mm f/2.8 ED SDM WR Lens 21280 B&H
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HD PENTAX-D FA* 50mm F1.4 SDM AW Lens - Ricoh
Amazon.com : Samyang 12mm F2.8 Ultra Wide Fisheye Lens for Pentax DSLR Cameras- Full Frame Compatible : Electronics
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RhinoCam Vertex Stitching Adapter - Pentax 6x7 Lens to Nikon Z Cameras – Fotodiox, Inc. USA