Amazon.com : Brightin Star 35mm F1.7 Large Aperture APS-C Manual Focus Prime Fixed Mirrorless Camera Lens, Fit for Canon EOS-M Mount M, M2, M3, M5, M6, M10, M100, M50, M200 (Black) :
Amazon.com : Pentax K1000 Manual Focus SLR Film Camera with Pentax 50mm Lens (Renewed) : Electronics
Amazon.com : Pentax-A A SMC 50mm 50 mm 1.7 1:1.7 - Pentax PK : Electronics
Amazon.com : Fotasy K-Mount Lens to E Mount Adapter, K Mount E Adapter, PK Lense to E, Compatible with Sony a7 a7R a7s II III IV a9 a7c Alpha 1 a6600 a6500