In article <32C93755.4F15@iquest.net>, bick@iquest.net says...

>Which lens will give me the capabiliaty and the possiblity for purchase
>($400-$600 used)?

The run-away best buy in Nikon fisheyes is a (used) AI or AI'd
16mm f3.5 Nikkor - this lens is SHARP, even wide-open (making it
also a speed lens, since hand-holding 1/4 second exposures with
a 16mm fisheye is easy). The price should be in your range.
Hope This Helps