It's a pre-Ai era model. It's known as a 35mm lens with an interesting bokeh....good actually, which is rather uncommon among most wide-angle lenses. It will mount and shoot, unmodified on the baby Nikons D60,D40,D40x,D3000,D5000, since those bodies lack both the Ai coupler AND they lack the minimum aperture sensing pin, which is located at the 7 o'clock position on the outer edge of the lens mount when looking at the face of the camera. It will probably NOT mount on your D80 unless some metal is removed from the outer rim of the aperture adjustment ring which was "fat" on lenses of that era.