I'm hoping someone can help. I have the D5000 and I also have a Tamron AF Aspherical LD DiII 19-250 3.5 - 6.3 lens. My problem is that the auto focus is not working when this len is connected to the D5000, but work fine on Nikon D80.
I have another len Sigma 150-500 f5-6.3 APO DG OS that works fine on the D5000.
Is the 18-250mm screw driven? Meaning, do you hear the body focus motor working on the D80 when you have it on that camera?
Yes... I can hear the motor on the D80 when auto focusing.