Round panoramas

[Drake]

I have always wondered how do they stitch such round, globe-looking panoramas. Is it even possible with a 18mm lens on a crop body or do I have to go way wider?

Here's an example (photos by Nick Heiwa):
http://funtasticus.com/20080331/works-by-japanese-photographer-nick-heiwa/

Any idea how it's done?

 

[KristinaS]

Here's a link of a tutorial that might help you:

http://www.dirkpaessler.com/blog/index.php/photographers-tools/2006/09/06/tutorial-create-your-own-planets/

 

[Drake]

Thanks a lot, I guess it kinda solves my problem

 

[KristinaS]

You're welcome!