[Morauder]

Tamron
http://www.bobatkins.com/photography...ron_11-18.html
Tokina
http://www.photozone.de/8Reviews/len...24_4/index.htm
http://www.photo.net/equipment/tokina/12-24-f4/
http://www.thkphoto.com/products/tok...t_article.html
http://www.popphoto.com/assets/downl...naLensTest.pdf
http://www.anands.net/faq/tokina.html