Amazon.com : Pentax DA 50mm f1.8 lens for Pentax DSLR Cameras : Digital Slr Camera Lenses : Electronics
Amazon.com : Pentax HD 31mmF1.8 Limited Black Limited Lens Wide-Angle Prime Lens [F1.8 Large Aperture Lens] [High-Performance HD Coating] [SP Coating] [Round-Shaped Diaphragm] [Machined Aluminum Body ] (20210) : Electronics
Amazon.com : Pentax SMCP-D FA 50mm f/2.8 Lens for Pentax and Samsung Digital SLR Cameras (OLD MODEL) : Camera Lenses : Electronics