[nis]

focus accuracy and speed is not only determined by the lens but also by the camera. No offense, but don't expect miracles from your D7000.

Thank you for remind me this

I was going to suggest a Sigma 17-70/2.8-4, that's the one of the new Contemporary line.

Actually I was thinking the same thing... but many review show that this lens show bad focusing ability as well accuracy, I have to look elsewhere, I am ok to invest in FF lens, since maybe in future I will move to FF, but definitely not now, I need to justify my Return On Investment

From the ww lenses I only know the Sigma 10-20/3.5, used that on Pentax quite a while and found it great. And it's fixed aperture and still 1/4 lower in price than Nikon 10-24/3.5-4.5

thanks for this info