Nikon 8mm f2.8 AIS Fisheye-Nikkor format_17.5mm meant to hold a flash

meant to hold a flash or similar small accessory with compatible mount

With minor cosmetic wear

This tiny lens extends less than an inch past the lensmount and provides a pleasant wide-normal field of view (full-frame equivalent to about 40mm)

effective for outdoor shooting under most conditions

Most notable issue: the leatherette has been reglued at some point

Nikon 8mm f2.8 AIS Fisheye-Nikkor format_17.5mm meant to hold a flashThe Nikon 8mm f2. 8 AIS Fisheye Nikkor is probably the lens you picture when someone mentions a fisheye unless you're an ichthyologist. But assuming you're not, this is probably the lens. With a huge, bulging front element and a built in filter turret, this lens is clearly not meant for day to day shooting: it produces a circular image in the middle of the frame, without any attempt to correct distortion. Field of view is 180 degrees, so watch where