This is the fairly rare fast standard lens in Pentax K mount. It is able to open up to f1.2, perfect for lowlight conditions or beautiful focus falloff.
This one is in excellent condition with only light wear. The glass is clean and scratch-free with no haze, fungus or other problems. The aperture is dry and snappy and the focus has that Pentax smoothness.
Lens caps are included. This is a nice lens.