I am interested in Fish eye lens for my Nikon line of camera bodies.
Looking at THIS site: http://www.nikonusa.com/en/Nikon-Pro...ses/index.page
I see there is a 16mm f/2.8 fish eye. It's spec calls for 180 degrees field of view when used with full frame cameras such as F100.
Now, there is also the famous 14-24mm zoom (which is NOT a fish eye) but it's maximum coverage is 114 degrees.
On Sigma line of products, there are 4.5mm and 8mm fish, then 10mm and 15mm fish.
I am not interested in round images, so first two are out.
Here's what I would like to know...
What does focal length do in fish eye lenses? Obviously, it does not define angle of coverage like it does for all other lenses.
Additionally, what IS fish eye then? Is that severe barrel distortion that makes a lens fish eye? Or is it 180 degree coverage? Or are they one and the same?
Somewhat related to both, how come 14mm regular wide angle has less coverage than 16mm fish?
How would I pick the "best" fish for me? Maybe that will come clear when I know the answers to my questions...
I am going to visit Cape Kennedy Space Center soon. Inside the Vehicle Assembly Building, I would like to make use of the "fish".