Nikon 8mm f2.8 AIS Fisheye-Nikkor format_17.5mm lens shows some internal dust

lens shows some internal dust but nothing too dramatic

or buy specially respooled 620 from

grippable camera mounting screw that can be loosened and tightened by hand

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)

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

Nikon 8mm f2.8 AIS Fisheye-Nikkor format_17.5mm lens shows some internal dustThe 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