Well, the Fisheye Lens simply got it’s name from it’s obvious
appearance. The way that these lenses protrude mimics
an actual fish eye thus giving spherical dimension to an image.
Here’s a couple of samples from my Canon 15mm 2.8
**Keep in mind that the closer you are to your subject
with a fisheye lens, the stronger the distortion.
It’s really a fun lens to have in your bag!
Now here’s a few from the Sigma 10mm 2.8
Oh, and the bottom 3 (of Boo) I had placed the Sigma
lens on my 10D so you can see a dark vignette around
the images. That’s because unlike my Mark 3, the 10D
does not have a full frame sensor therefore you get that
lovely (yuck) black vignette around your images. Not nice.
Well, they both run between $650 and $700 so be sure
that you get what you want/need. B&H was happy to allow
me the time to order the Sigma, test them side by side
and then return one. I chose to return the Sigma…for now!