Amazon.com : Pentax DA 50mm f1.8 lens for Pentax DSLR Cameras : Digital Slr Camera Lenses : Electronics
Amazon.com : Pentax SMC PENTAX-F 50mm 1:1.7 AF F1.7 Auto Focusing Lens : Electronics
Amazon.com: Pentax SMC M M 1:1.7 1.7 50mm 50 mm Asahi PK : Electronics
Amazon.com : Meike 50mm F1.7 Full Frame Manual Focus Prime Lens Compatible with Canon RF Mount Cameras EOS-R EOS-RP R5 R6 : Electronics
Amazon.com : Meike 50mm F1.7 Full Frame Large Aperture Manual Focus Lens for Panasonic Lumix Sigma Leica L-Mount Mirrorless Camera Such as S1, S1R,S1H, S5, FP… : Electronics
Pentax A 50mm F1.7 SMC Manual Focus Lens for Super Program Camera : Electronics - Amazon.com