oh my ... that lens ! thanks for the heads up
flir.php ... so much search result returns :p
No special lens was used - that's a E4 modded with the res hack - but there is a catch.
Your going to need ImageMagick, MS ICE, PHP, EXIFTool, FLIR Tools, and a decent chunk of time.
There is another PHP file here (splitjpg.php) that was used to stitch many images together into a panoramic with MS ICE then I ran the output though the splitphp then FLIR tools then finally the flir.php. It's a bit convoluted but results are

. Users here like tomas123 and daves have contributed some insane work on this.