A good value lens for photography beginners who want to try out longer focal lengths. This is a PENTAX K MOUNT camera lens that requires an adaptor on non-pentax cameras. Overall clear optics and good image quality, with slight dust and scratches typical of such vintage lenses. Aperture works fine and clicks. Two lens caps and case included. Focus ring nice and smooth. Zoom is nice and smooth Tested with a digital camera, sample images (calipers) included, shot at f5.6 and f11 at 300mm There is a small dent on the filter thread in the front.