Gain macro capabilities with your Pentax K lens by mounting it to your Sony E-mount camera with the DLX Stretch Adapter from Fotodiox. It features an integrated focusing helicoid that provides close-up focusing when desired and can be retracted for guaranteed infinity focus during general purpose shooting. This adapter also features a magnetic drop-in filter system and comes with ND4, ND8, and ND16 filters that allow for added light control and will work with any adapted lenses. Additionally, this adapter features a precise construction with chrome-plated brass mounts that securely hold the lens and camera in place. A soft case for the drop-in filters is included in the package.