This is a Nikon F-mount fisheye lens. I found it very useful with film cameras. Of course, it can also be used with F-mount digital cameras and mirrorless cameras with an adapter. Photos 10 and 11 were taken with a film camera. Photos 12 and 13 were taken with a digital camera. ⚫︎Condition I have never experienced any problems when using it. The exterior shows signs of use, such as small scratches and scuffs. There are some scratches and dirt on the front lens. There is some lint mixed in with the rear lens, and something like coating peeling on the edge (photo 8). Please note that there is no lens cap.