Specification :

Fisheye lens is a wide-angle lens that takes in an extremely wide, hemispherical image.The focal lengths of fisheye lenses depend on the film format.Fisheye lenses achieve extremely wide angles of view by forgoing a rectilinear image, opting instead for a special mapping ( for example: equisolid angle) , which gives images a characteristic convex appearance. A panorama by rotating lens or stitching images ( cylindrical perspective) is not a fisheye photo.
Fisheye lens showed in picture is used for Sanyo projector XM-1000C, 5000 Lumen.We could manufacture and design kinds of fisheye lens as reqeusted.