This is the famous Imagon variable soft focus lens made famous by hollywood glamous photographers of the 1940s and 50s.  Suitable for 4x5 and 5x7" large format cameras.  Also comes with a custom made adapter for Nikon SLR cameras for ultra soft, romantic "impressionist" like results. 


Rodenstock 250mm Imagon soft focus lens - Nikon or 4x5"