PENTAX SMC 200mm f/4 Lens, Pentax K-mount - Brand: PENTAX - Model Name: SMC PENTAX 200mm f/4 - Focal Length: 200mm - Aperture: f/4 - Country of Manufacture: JAPAN - Mount Type: K-mount Operation confirmed, no problems. Both the focus ring and aperture ring are smooth. Regarding the optics, there is some dust and slight coating degradation on the front element, but no mold or haze, and it is clean. Sample photos were taken at f/4, f/5.6, and f/8. I hope this is helpful. Accessories: Rear cap, front cap, lens hood (third-party) Thank you! Focal length...151-200mm Open F value...2.9-4 #Pentax #PrimeLens #Telephoto #OldLens #Kmount #Pentax