Looking for a tripod mount: Pentax SLR Talk Forum: Digital Photography Review
Pentax SMC DA* 60-250mm f/4 ED [IF] SDM - Review / Test Report
Amazon.com : Pentax SMC DA* 60-250mm f/4 ED IF SDM Telephoto Zoom Lens w/ Case for Pentax Digital SLR Cameras : Digital Slr Camera Lenses : Electronics
Pentax SMC DA* 300mm F4 ED[IF] SDM Review | PCMag
SMC PENTAX 67 LS 6x7 165mm f4 Prime Telephoto MF Lens – Film Supply Club