Nikon 8mm f2.8 AIS Fisheye-Nikkor format_17.5mm Not a series adapter: this

Not a series adapter: this just takes glass blanks

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

lens shows some internal dust but nothing too dramatic

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

effective for outdoor shooting under most conditions

Nikon 8mm f2.8 AIS Fisheye-Nikkor format_17.5mm Not a series adapter: thisThe 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