This is the older version of the Sigma 8mm fisheye which has the option of a manually operated apurture so it can be used on a mirrorless camera with a suitable adapter. I mostly used it on a Nikon body so the lens was electronically controlled although it does not have a built in focus motor so the autofocus only works on compatible models. It's not really an issue though as it is so wide angle you basically just set the focus to 1m and everything is in focus anyway. The lens cap uses friction to hold it in place & has become less grippy with age but the body & optics are in excellent condition. Includes a soft lens pouch but not the Sony camera & adapter shown in the pictures.