I currently have a D7000 and my husband is using my D3100, (at last a hobby we can share). I want to purchase a wide angle lens before our next trip and am currently tossing up between the Tokina AT-X 116 PRO DX AF 11-26 f2.8 and the Nikkor 10-24 AF-S DX 3.5 - 4.5G ED. I know the Tokina won't AF on the D3100 and the Nikkor will. The Tokina is also heavier which does worry me a bit. I can get the Tokina about $200 cheaper than the Nikkor. Does anyone have any experience with these lenses? Would love to hear some opinions.