Pentax 50mm f/2 SMC M Manual Focus K-Mount Lens {49} at KEH Camera
Amazon.com : Pentax smc PENTAX-FA 50mmF1.4 Classic, Single-Focus, Standard Lens for use with K-Mount Digital SLR Cameras ND Filter Included : Electronics
Pentax SMC P FA - Lens - 50 mm - f/1.4 - Pentax K - for Pentax K-1; *ist; MZ; PZ; ZX - Walmart.com