theedge wrote:Sigma has a good range of 10-20mm lenses.
I would however opt for the older sigmas (I think 10-20mm 4-5.6 is older), because the quality control of the newer models aren't so good. I bought one that had slight decentering and had to return it (ie one corner of the pic was really blurry when you zoom in). Then again it depends how lucky you are.
I use the Sigma 10-20mm on a D7000 when I shoot real estate photos. It converts to 15mm and is sharp and fairly robust. It gets good reviews too. Recommended.
And with a cropped chip you get great depth of field at f4
That being said it's the only non-Nikon lens I own preferring 16-35mm on a full frame camera for the sharpness and when you don't need better than f4.