Pentacon Prakticar 50mm F1.8 MC LENS. PB Bayonet mount ( so NOT screw mount ) . The lens works ok , nice tight smooth focus , nice fast snappy iris , clean with no oil on it . There are no optical fungus or haze , a couple of almost invisible cleaning marks on the front element and just the odd tiny dust specks etc as usual , it`s a nice bright lens. Supplied with caps . Free UK P&P ( costing me £4.50 )