For sale is my Sigma 15mm fisheye lens. It is a Nikon mount manual focus lens, and is a 'fullframe' fisheye. This is unique because it allows use of filters that screw onto the inside of the lens, which comes apart with a bayonet mount for that purpose! It has the original 'normal' filter in place (I think it has to have a filter there to focus accurately). It is in perfect mechanical condition and the glass is good except some internal dust. Includes the original Sigma front and rear caps. $219 including Priority Mail shipping in the USA.