Schneider Kreuznach 50mm f/2.8 Retina Xenar in DKL mount for Kodak Retina Reflex SLR. The glass has no fungus or haze. The focusing ring turns smoothly. The aperture tab moves smoothly and the lens stops down correctly. The lens is clean cosmetically. The outer bayonet ring has a very subtle deformation which may not effect filter/hood mounting. it can be seen in the photos.