Pentax 6x7 Pentax 67: International Camera Museum : Blue Moon Camera and Machine
Amazon.com : 67mm 7 Piece Filter Set Includes 3 PC Filter Kit (UV-CPL-FLD-) and 4 PC Close Up Filter Set (+1+2+4+10) for Canon, Olympus, Pentax, Sony, Sigma, Tamron SLR Lenses, Digital Cameras
PENTAX Camera Lens Filters 67 mm Filter for sale | eBay