Thank you for viewing. This is a YASHICA M42 mount lens. It is not a K-mount. It can be used with digital cameras via a mount adapter, and focusing is manual. Includes front and rear caps, and a filter. I can't see any major scratches on the lens barrel, front element, or rear element with the naked eye. The aperture and focus rings turn with appropriate torque. Please refrain from purchasing if you are overly concerned about condition. This is an old item, and will be sold as-is. In the event of any oversight or issues after arrival, the buyer will need to handle them. We cannot cover repair costs or accept returns, so please purchase only if you understand and agree to this. Thank you. SN: 326652 8900→7900→7700→7500→7300→7200→7100→6900→6700 Focal Length...19-70mm Maximum Aperture...1.5-2 Other Features...Front lens cap included, Rear lens cap included