M42 to K-mount adapter won't unscrew - PentaxForums.com
APM Telescopes. T2 Adaptor for Pentax K Bajonett oder Sigma SA (D)SLR Cameras
KF Concept PK-E PRO Pentax K bajonett adapter - Sony E vázakra (KF06.445) - StúdióEszközök
Kaiser Hátsó objektív sapka Pentax K bajonett - 6537 - Objektív - Fotótechnika - Tripont
Lens Adapter Pentax K Bayonet Lens to Sony MA Bayonet Cameras for Sony Alpha A100, A200, A230, A290, A300, A33, A330, A350, A380, A380 90 , A. 450, A500, A55, A550, A560,
Modified DA*60-250/4 on K-1: Pentax SLR Talk Forum: Digital Photography Review
Amazon.com : NOVOFLEX Adapter Compatible with Sony E-Mount Camera Body to Pentax K Lenses (NEX/Pent) : Camera Lens Adapters : Electronics
Lens2scope , 7mm wide angle, for Pentax K lenses, black, angled eyepiece