Third party, solidly built wide angle prime from the film era. Adapts easily to mirrorless. Supposedly distributed by Woolworths (don't know if that means the U.S. based F.W. Woolworths, or the company located in Australia). Focus and aperture work smoothly.  Blades are clean. Aperture range is f/2.8-22. Glass is in good shape, no fungus, some cleaning marks on an internal element, and some dust. Dust and marks do not appear to affect image quality. Minimum focus distance is about 18 inches. Minor cosmetic wear. Includes caps. Please review photos and test images. Test pictures are Sony jpgs (full frame sensor) and are straight out of camera.