This lens is in perfect working order, newly refurbished by Sigma.  Full disclosure, there is a single speck of dust inside the front element, off center, not visible through the camera.

The Sigma Contemporary Lens 16mm f/1.4 for Sony E-Mount is a high-quality auto lens that offers excellent performance for Sony mount cameras. With a fast maximum aperture of f/1.4, this lens is ideal for low-light conditions and capturing crisp images with beautiful bokeh. Featuring both auto and manual focus options, this lens provides versatility for photographers looking to achieve precise shots. The lens is specifically designed for Sony E-mount cameras, ensuring a secure fit and optimal performance with Sony cameras.