Schneider Kreuznach Xenagon 1:3.5 30mm lens for Robot camera made in Germany. This lens is for Robot screw mount cameras. 

This is in excellent condition. The optics are clear. Smooth aperture and focus.  Comes with front cap, Extension tubes and original box. 

All vintage lenses can be used with modern cameras with appropriate adapters. 

Light dust inclusions are expected on vintage lenses due to age.