© 2006 KenRockwell.com
Nikon 12 - 24
mm f/4, Tokina 12 - 24 mm f/4, Sigma 10 - 20 mm f/4 - 5.6 and Tamron
11 - 18 mm f/4.5 - 5.6.
Click an image to get it from Adorama. Also try Amazon. It helps me if you get yours at either one.
The lenses perform as marked. The Nikon's 12mm is very slightly wider than the Tokina's. The Tamron's 11mm is wider still, and of course the Sigma is the widest of all at 10 mm.
This is good. 20 years ago lens makers lied a lot. Today their marked focal lengths are honest.
No surprises. The lenses perform as marked.