This is my third stereographic projection. I took this in Balboa Park outside of the Botanical Garden.
This image took about 216 pictures to make using my 18mm lens. I really wish that I had a good fish eye lens so that I could reduce that number to just 15 pictures if you count all of the pictures required to make it an HDR.
A Sigma 10mm f/2.8 EX DC HSM Fisheye Lens is now on my wish list and it would make my life much easier.
I used Photomatix to batch process the HDRs.
Then I used PTgui to make the equirectangular panorama.
I used Flexify 2 plug-in for Photoshop to turn that equirectangular pano into a stereographic projection.
Then I used Photoshop to touch up stuff.
*Update* 7/30/2010 -
Here are some websites that feature this photo: