Nikon 8mm f2.8 AIS Fisheye-Nikkor adapter but this is also the

but this is also the right size for a 35mm rangefinder or a small SLR

III and IIIa cameras

* please note: this is still a mid-50s German folding camera

the autofocus performance is miserable

Available in 35mm only

Nikon 8mm f2.8 AIS Fisheye-Nikkor adapter but this is also theThe 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