Kipon Pentax M42 Screw Mount Lens to Sigma SA Camera Lens Adapter KP-LA-SG-PXS
K&F Concept PK/DA L Manual Focus Lens Mount Adapter for Pentax K(PK/DA) Lens to Sigma Leica Panasonic L Mount Mirrorless Cameras|Lens Adapter| - AliExpress
Sigma A Art 30 mm f/1.4 DC HSM Lens For Pentax K-Mount **Near Mint** Condition | eBay
SIGMA 30mm F1.4 EX DC AF Lens for PENTAX K Mount From JAPAN [Exc++] #1112934A | eBay
Sigma 18-300mm f/3.5-6.3 DC MACRO OS HSM Contemporary Lens with Sigma AML72-01 Close-Up Lens for Pentax K Mount - Walmart.com
Sigma 80-200mm F3.5 Zoom Lens for Pentax K Mount - Etsy Norway