Lovely vintage Canon 50mm F1.4 lens, often referred to as the Japanese Summilux! 
Optically it’s a very pleasant performer with classic rendering, if not a touch contrasty for its time, but still very much on the lower contrast side in comparison with today’s more punchy lenses 
Optically excellent for its age with no haze/dust/fungus present or anything that would impact image quality
Focus is smooth throughout the range and aperture clicks are distinct and in full stops 
Comes with a filter and generic rear caps