SMC Pentax-F 50mm f2.8 autofocus macro lens. Rare! Optically: external glass coating without scratches/marks. Minor dust behind rear element. Cosmetically: unfortunately, focus scale cover glass is damaged - as seen in second picture. Focusing and aperture move freely - but I don't have Pentax camera to test AF or auto exposure/electronic contacts. Rear cap included. Return for refund, if not happy.